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`JP207 S07S7S 1A NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
`
`Auplicariis: PANASONIC CORP
`
`inventors: RINDSHITA MASAHIRG NAGURA KENSURE NATSUE RYUICHI
`
`Classiioagtions:
`BS
`
`HOTMA/SS;
`
`Priorities: JP207 12 120054 2074-09-28
`
`Application: JP2O172720954 2011-09-28
`
`Publication: JP2oTa07S7SiA-13-04-22
`
`Published as: JP2OTI0737a 4s
`
`NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
`
`Absitact
`
`PROBLEM TOS BE SOLVED: To provide @ nonaqueous electrolyte secondary ballery which uses a novel
`cathode active niaterial and has high enerqy density and good reversibly. SOLUTION: The nonaqueous
`aiectrolyie secondary beallery comprises: a cathode using 4 hihhum-containing compound as a mein cathode
`eextive material and an anoce. The Hihkun-conteining cornpaund satisfies LIMNF. Mn is partially substituted
`by ane or more slernents selected fram Th V, Or, Mn. Pe, Oo, Cu. dn, 2r, Nb. Mo, WW. Oa, Sr. Ba, Al and
`Bi
`
`worldwid espacenet.contpatentsearch fanuly0484781 37/pablicatiaonP2013...
`
`
`
`2020/02/19
`
`

`

`
`
`Notice
`This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
`complete, reHable or fit for specific purposes. Critical decisions, such as commercially relevant or
`financial decisions. should not be based on machine-translation output.
`
`CLAIMS JP2013073791
`
`1.
`A non-aqueous electrolyte secondary battery comprising a positive electrode and a negative
`electrode mainly containing a lithium-containing compound as a positive electrode active
`material,wherein the Hthivan-containing compound satisfies the following composition formula
`(ASMX b GEL. AMKLi, MiSMn, XERE. big6G) +++ C1)
`
`2.
`
`2. The nonaqueous electrolyte secondary battery according to claim 1, wherein Min the
`composition formula (1} includes Mn and a metal element in which a part of the Mnis further
`substituted.
`
`2 +
`
`The metal element is at least one elerment selected from Ti, V, Cr, Mn, Fe. Co, Ca, Zn, ¥, Zr, Nb,
`Mo, W, Ca, Sr, Ba, Al, and Bi, The non-aqueous electrolyte secondary battery according to claim2,
`wherein:
`
`4,
`
`X in the composition formula (1) is composed of F and Gin which a part of F is further
`substituted, and b in the composition forrmula (1) is 6-x, where x is Q Ss x <0, 2. The non-aqueous
`electrolyte secondary battery according to claim i, wherein
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`

`
`
`Notice
`This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
`complete, reHable or fit for specific purposes. Critical decisions, such as commercially relevant or
`financial decisions. should not be based on machine-translation output.
`
`DESCRIPTIONJP2013073791
`
`Abstract: Provided is a non-aqueous electrolyte secondarybattery using a novel positive
`electrode active material, having a hich energy density, and having good reversibility. A non-
`aqueous electrolyte secondary battery includirig a pusitive electrode and a negative electrode
`mainly containing a lithium-containing compotundas a positive electrode active material, wherein
`the lithium-comaining compound satisfies LiMnF. Further, Mn is one or more elements selected
`from gold Ti, V. Cr. Mn, Fe, Co, Cu, Zn, Y. Zr, Nb, Mo, W. Ca, Sr, Ba, Al, and Bi. Partially replaced.
`[Selection diagram] Fig. |
`
`Non-aqueous electrolyte secondary battery
`
`{OOO1}
`The present invention relates to a non-acpueaus electrolyte secondary battery, and particularlyto
`a novel positive electrode active material thereof
`
`joo02|
`2. Description of the Related Art In recent years, secondary batteries have been developed as
`small secondary batteries, mobile power sources, or Stationary power sources, and demands for
`higher energy density and higher performance of secondary batteries in each field are extremely
`high. .
`
`{OQ03}]
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`in particular, in the use of a mobile power source anda stationary powersource, in arder to use a
`secondary battery as such a powersource, it is necessary to connect a large number of batteries
`in series or in parallel to form a module. There is a demand for developing a secondary battery
`having a high energy density in order to minimize the energy consumption.
`
`The non-aqueous electrolyte secondary battery has a higher operating volrage than the aqueous
`solution secondary battery, and is a preferable secondarybattery in viewof the abovepoints.
`Hawever, a positive electrode such as LiCaQ 2, LANIO 2. LiMn 2 O 4, and LiFePO 4 whichis
`currently commercialized The active material is of the order of GOO to 800 Wh / kg, and further
`higher energy density is desired.
`
`[0004]
`
`From such a point, some pasitive electrode active materials for non-aqueous electrolyte
`secondary batteries have been proposed.
`
`For example, Patent Literature | and Patent Literature 2 disclose the use of a halide having a
`high electronegativity suchas FeFS or LiGFeF6. However, since the redox potential af a meta!
`element used is low, only a discharpe voltape of about 3 V is obtained. In the active material, the
`charge / discharpe capacity can be increased by utilizing a conversion reaction in which the
`alkali metal Liin the structure is separated from the bond with the metal element Fe and bonds
`with halogen, particularly fluorine (F}), However, the reaction in this conversion region has low
`reversibility and low operating voltage. In order to realize a high energy density, it is desirable to
`use only the insertion reaction region where the change in the host structure during the charge /
`discharge reaction is small.
`
`{O00S})
`JP-A-09-22698 JP-A-09-55202
`
`{OGOG6}
`In viewof the above, an object of the present invention is to provide a nanaqueous electrolyte
`secondary battery having a high energy density and a good reversibility using a novel positive
`electrode active material.
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`

`{OOO7}
`In order to solve such problems, according to the present invention, in a nonaqueous electrolyte
`secondary battery including a positive electrode and a negative electrode mainly including a
`Hthium-containing compound as @ positive electrode active material, the ithium-containing
`compound has the following composition formula (2): The nonaqueous electrolyte secondary
`battery to be filled.
`
`{OGO8}
`
`ASMXb Owhere A is Li, M is Mn, X is F, and b is 6) (2) Further, M in the compasition formula is
`Mn(trivalent), and one of the MnIt is also preferred that the metal element be replaced with a
`metal element.
`
`By substituting Mn (trivalent) in the composition with metal elements having different ionic radii,
`volume Huctuations such as expansion and contraction and distortion of the crystal lattice caused
`by charging and discharging are suppressed, and the crystal structure is stabilized. Improves
`durability.
`
`JOOO9}
`
`‘The metal element is at least one element selected from Ti. V, Cr. Ni Fe, Co. Cu, 2n. ¥. 2, Nb, Mo,
`W, Ca, Sr, Ba, Aland Bi. It is preferred that
`
`These elements are a Gd transition, a 4d transition, and a 4f transition system, and have an tonic
`radius close to that of Mn (trivalent).
`
`These elements are preferable because they cannot be replaced if the ionic radius is toa different.
`
`{OO1O}
`
`Further, X in the composition formula is composed of P and O in which a part of F is further
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`substituted, and b in the composition formula is 6-x, where x is 0 Sx <0.05. Is also preferred.
`Here, if it exceeds 0.05, the voltage may decrease or the crystal structure may not be maintained.
`
`[OGL 1]
`By substituting a part of X with O, a part of Mn (trivalent) in the composition can take an
`expensive number state such as W (pentavalent), V (pentavalent), Mn (hexavalent), and the like.
`Substitution with another metal element is possible, which causes crystal distortion and atomic
`deficiency, and facilitates diffusion of ions in the solic phase, thereby further improving battery
`characteristics.
`
`{O012}
`As described above, according to the present invention, when A is an alkali metal having Lias a
`main component, M is a metal elernent having Mn as a rnain cormpanent, and X is a ligand having
`Fas amain component. A nonaqueous electrolyte secondary battery with an extremely high
`energy density can be provided by using a lithium-containing compound whose coniposition
`formula is represented by ASMX6and whose crystal structure belongs to C2 / cas a main
`positive electrode active material.
`
`JOO13)
`Longitudinal sectional view of a non-aqueous electrolyte secondarybattery accordingto one
`embodiment of the presentinvention
`
`{OO14)
`
`Hereinafter, the present invention will be described in more detail,
`
`That is, in order ta provide a non-aqueous electrolyte secondary battery having good reversibility
`in the charge / discharge reaction and a high discharpe voltage, first, a crystal structure having a
`diffusion path of Li ions for causing a highly efficient charge / discharge reaction. Second, as a
`result of earnestly searching for a metal element and a ligand capable of obtaining a high energy
`density as a positive electrode of a non-aqueous electrolyte secondarybattery, the alkali metal
`containing Li as a main component described above wasobtained. Is A, a metal element having
`Mn as a main component is M, and a ligand having F as a main componentis X, a conrpound
`having a composition represented by ASMX6 and a structure belonging to the space groupC2 /
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`cis obtained. The above problem can be solved byusing it a8 a main positive electrode active
`material, and a high energy density of 1000 Wh / ko class is realized when the above-mentioned
`Higand, particularly fluorine, is used. [t was found to be a positive electrode active material that.
`
`{OO1LS}
`The reason whythe active material shownin the present invention has a high discharge voltage
`and shows good charge / discharge behavior is considered as follows.
`
`{OO1LG}
`
`The voltage indicated by the active material for a battery largely depends on the electronic state
`of the metal elernent that performs charge transfer in the active material, that is, the electric
`charge. Therefore, selection of the metal elament is important.
`
`Compounds of metal elements such as Co. Ni, Mn. V. and Fe are used as the positive electrode of
`the nonaqueous electrolyte secondary battery.Among these, Mn is Mn (trivalent) and Mn
`(etravalent) to Mn (6).)}. The potential of which is higher than that of transition metal elements,
`and a compound having relatively high chemical stability is produced.
`
`Furthermore, it is less toxic than compounds such as Cr and V, and is inexpensive for Co.
`
`{OOL7}
`
`Among the Mn compounds having such characteristics, in order to be usable as an active
`material of a nonaqueous electrolyte secondary battery, it is necessary to have a Li diffusion path
`in the crystal structure.
`
`The crystal structure of ihe compound having the compasition ASMX6as the precursoris
`monoclinic Ce /-c, and the alkali metal A and the metal element M mainly composed of Mn share
`the &f site surrounded bythe six ligands X and form a tunnel. Forming the structure. Such a
`tunnel structure provides a good diffusion path for the alkali metal A. Thatis, it is considered that
`the alkali metal A diffuses while happing at the 8f site, thereby enabling a highly reversible
`charge / discharge reaction,
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`{OO18]
`
`On the other hand, as deseribed above, since the potential has a positive correlation with the
`charge of the metal element, in order to achieve a high energy density. the ligand should be
`selected so that the metal element has a high charge. The active material, which has high
`electronegativity, such as F, O, as a Hgand, deprives the metal clement of an electron, so that the
`real charge of the metal element increases, and thus a high discharge voltage is obtained. . In
`particular, the coordination of F having a high electronegativity is preferable because theeffectis
`remarkably larpe and an active material having a high energy density can be obtained.
`
`(OO19]
`
`By substituting a very small number of the ligands X with oxygen O,.a part of Mn (trivalent) as a
`metal clement is expensive such as W (pentavalent}, V (pentavalent), and Mn (hexavalent).
`Substitution with another metal element that can take several states becomes possible, which
`causes distortion of crystals and loss of atoms, and facilitates diffusion of ions in a solid phase,
`thereby further improving battery characteristics. However, since excessive substitution lowers
`the voliage instead, the substitution amount of the Hgand should be in an optimal rarige for
`solving the above-mentioned problem.
`
`{OO2Z0}
`As described above, the configuration of the present invention can provide a high energy density
`nonaqueous electrolyte secondary battery having good reversibility,
`
`{0021}
`
`Hereinafter, specific examples of the present invertion will be described.
`
`The nonaqueous electrolyte secondary battery of the present Invention is characterized by a
`pasitive electrode active material, and other components are not particularly limited.
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`

`[O022)
`
`FIG. 1 ilustrates a cross section of a coin-type non-aqueous electrolyte secondary battery as an
`example of the present invention, In PIG. 1, reference numeral | denotes a battery case made of a
`stainless steel plate having resistance to organic electrolyte, reference numeral 2 denotes a
`sealing plate madeof the same material as the battery case 1, and reference numeral 3 denotes a
`current collector made of the same material as the sealing plate 2. The current collector 3 is spot-
`welded to the inner surface of the battery case 1. Reference numeral 4 denotes a lithiummetal
`negative electrode, and reference numeral 5 denotes a positive electrode of the present
`invention, which is composed af, for example, LiISMnF6 described later as an active material,
`acetylene black as a conductive agent, and polytetrafluoroethylene as a binder, Reference
`numeral G denotes a microporous polypropylene separator, and reference numeral 7 denotes a
`polypropylene insulating gasket.
`
`{0023}
`{Example 1} The positive electrode active material was obtained by mixing commercially
`available MnFe and LIP at a molar ratio of 1: 3.3 in an Ar atmosphere, kneading them ina
`mortar, and then firing at 750° C for 12 hours in an Ar atmosphere. In this way, they were
`synthesized,
`
`fOG24)}
`
`Usingthe obtained LiIGMnfS, a positive electrade 5 of a nonaqueous clectrolyte secondary
`battery was configured as follows.
`
`Under an Ar atmosphere, LiGMnF6, acetylene black, and polytetrafluoroethyleneas a binder were
`mixed at a ratio of 80/10: 10, kneaded in a mortar, and then press-moided to form a pellet having
`a thickness of 200 p.m and a diameter of 12 mm. Agent.
`
`{0025}
`
`Using the positive electrode plate thus obtained, an evaluation batlery was constructed as
`follows. As the lithhim metal negative electrade 4, a metal Uthium foil Ghickness: QO.) mm)
`punched into a size of 15 mmo was used. As the electrolyte, a mixture of ethylene carbonate and
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`

`ethyl methyl carbonate at a ratio of L: 3 was used as a solvent. and an organic solvent electrolyte
`in which | mol of LiPF 6 was dissolved per liter as an electrolyte supporting salt was used. As the
`separator 6, a 20- g m-thick polypropylene porous film was used. The positive electrode 5 and
`the lithium metal negative electrode 4 were placed in a stainless steel battery container with a
`separator 6 interposed therebetween, and after injecting a non-aqueous solvent electrolyte, they
`were sealed with a lid via an insulating gasket 7,
`
`{OO26}
`{Example 2) A battery manufactured in the same manner as in Example | except that
`LiSMnO0.95Ti0.05F6 was used as the pasitive electrode active material was used.
`
`{0027}
`The cathode active material was obtained by mixing commercially available MnF2, TiF2, and LiF
`at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading therm in a mortar, and then
`at 750° C. for 12 hours in an Ar atmosphere. It was synthesized byfiring.
`
`{OG628}
`{Example 3} A battery manufactured in the same manner as in Example 1 except that
`LISMn0.95VO0.05F6 was usedas the positive electrode active material was used.
`
`{OQO29}
`The positive electrade active material was obtained by mixing commercially available Mnk2, VFe2,
`and LIF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading in a mortar, and
`then at 750° C. for £2 heurs in an Ar atmosphere. It was synthesized by firing.
`
`JOO30]
`Example 4 A battery manufactured in the sarne mariner as in Exarnple 1 except that
`LISMn0.95Cr0,05F6 was used as the positive electrode active material was used,
`
`{O03 1}
`The positive electrode active material was obtained by mixing commercially available MnF2.
`Crf2 and LiF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading themina
`mortar, and then at 750° C. for 12 hours in an Ar atmosphere. It was synthesized byfiring.
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`

`{0032}
`Example 5 A battery manufactured in the same manneras in Example 1 except that
`LISMnO.95Ni0.05F6 was used as the positive clectrode active material was used.
`
`{0033}
`The positive electrade active material was obtained by mixing commercially available MnF2,
`NiF2, and LIF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading them ina
`mortar, and then at 750 © C. for 12 hours in an Ar airnesphere. It was synthesized byfiring.
`
`{O03 4]
`{Example 63 A battery manufactured in the same marmer as in Example 1 except that
`LISMnO.95FeO.05F6 was used as the positive electrode active material was used.
`
`{OO35}
`The positive electrode active material was obtained by mixing commercially available MnF2,
`FeF2 and LiF in an Ar atmosphere at a molar ratio of 0.95: 0.05: 3.3 and kneading them ina
`mortar, and then at 750° C. for 12 hours in an Ar atmosphere. [t was synthesized byfiring.
`
`{OO36})
`Example 7 A battery manufactured in the sarne mariner as in Exarnple 1 except that
`LISMnO.95Co0.05F6 was used as the pasitive electrode active material was used,
`
`[0037]
`The positive electrode active material was obtained by mixing commercially available MnF¢,
`CoFd, and LiF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading them ina
`mortar, and then at 750° C. for 12 hours in an Ar atmosphere. It was synthesized byfiring.
`
`[0038]
`{Example 8) A battery manufactured in the sarne manner as in Example 1 except that
`LISAMNnO.95Cu0.05F6 was used as the pasitive electrode active material was used.
`
`{OQ39}
`The positive electrode active material was obtained by mixing commercially available MnF2,
`CuF2, and LIF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading themina
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`

`mortar, and then at 750 © C. for 12 hours in an Ar atmosphere. [t was synthesized by firing.
`
`{OG40}
`Example 9 A battery manufactured in the same manner as in Example | except that
`LiISMn0.957n0.05F6 was used as the positive electrode active material was used.
`
`{O04 1]
`The positive clectrade active material was obtained by mixing commercially available MnF2,
`2nF2 and LiF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading them in a
`mortar, and ther: at 750 ~° Cfor 12 hours in an Ar atrnosphere, It was synthesized byfiring.
`
`{OO4 2]
`{Example 10) A battery manufactured in the same manner as in Exarnple | except that
`LISMnO0.O5Y0.05F6 was used as the positive electrode active material was used.
`
`{OG43}
`The positive electrode active material was obtained by mixing commercially available MnF2. YES
`and LIF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading them in a mortar,
`and then at 750° C. for 12 hours in an Ar atmosphere. It was synthesizedbyfiring.
`
`{0044}
`{Example 11} A battery manufactured in the same manner as in Example 1 except that
`LISMn0.O5Nb0.05F6 was used as the positive electrode active material was used.
`
`{OO45]
`The positive electrode active material was obtained by mixing conimercially available MnF2,
`NbBFS and LIF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading them ina
`mortar, and then at 750° C. for 12 hours in an Ar atmosphere. it was synthesized by firing.
`
`{OO46]
`{Example 12} A battery manufactured in the same manner as in Example | except that
`LiISMn0.95Mo0.05F6 was used as the positive electrode active material was used.
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`

`{OO47)
`The positive electrode active material was obtained by mixing commercially available Mnk2,
`MoF3 and LIF in an Ar atmosphere at a molar ratio of 0.95: 0.05: 3.3 and kneading themin a
`mortar, and then at 750° C. for 12 hours in an Ar atmosphere. It was synthesized byfiring.
`
`{OO48}
`(Example 13} A battery manufactured in the same manner as in Example 1 except that
`LiSMnO.95W0.05F6 was used as the positive electrode active material was used.
`
`JOOAG]
`The positive electrode active material was obtained by mixing commercially available MnF2,
`WF, and LiP in an Ar atmosphere at a molar ratio of 0.95: 0.05: 3.3 and kneading in a mortar,
`and then at 750° C. for 12 hours in an Ar atmosphere. It was synthesized byfiring.
`
`[OQ50}
`(Example 14) A batrery manufactured in the same manner as in Example 1 except that
`LISMnO.95CaQ.05F6 was used as the positive electrode active material was used.
`
`JOOS 1]
`The positive electrode active material was obtained by mixing commercially availableMnF2,
`CaFé and LiF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atrnosphere and kneading them Ina
`mortar, and then at 750° C. for 12 hours in an Ar atmosphere. It was synthesized by firing.
`
`{OO52]
`{Example 15) A battery manufactured in the same manner as in Example | except that
`LISMn0.95Sr0.05F6 was used as the positive electrode active material was used.
`
`[0053]
`The positive electrode active material was obtained by mixing commercially availableMnF2, SrP2
`and LIP at a molarratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading them in a mortar,
`and then at 750° C. for 12 hours in an Ar atmasphere. It was synthesized byfiring.
`
`{O054]
`{Example 16) A battery manufactured in the same manneras in Example | except that
`
`{2-02-2020
`
`11
`
`

`

`LISMnO.95BaQ.0SF6 was used as the positive electrode active material wasused.
`
`{OO55]
`The positive electrode active material was obtained by mixing commercially available MnF2,
`BaF, and LIP at a molarratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading them in a
`mortar, and then at 750° C.for 12 hours in anAr atmosphere. ft was synthesized byfiring.
`
`{OOS6]
`{Example 17} A battery nramufactured in the same manner as in Example 1] except that
`LISMnO.9S5AI0.05F6 was used as the positive electrode active material was used,
`
`{OOS7}
`The positive electrode active material was obtained by mixing commercially availableMnFd, AIFS
`and LIF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading them in a mortar,
`and then at 750° C. for 12 hours in an Ar atmosphere. It was synthesized by firing.
`
`{Q058]
`(Example 18) A battery manufactured in the same manner as in Example 1 except that
`LISMn0.OSBi0.05F6 was used as the positive electrode active material was used.
`
`{OOS9}
`‘The positive electrode active material was obtained by mixing commercially availableMnF2,
`BiFS, and LiF at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneading themin a
`mortar, and then at 750 “°C. for [2 hours in an Ar atmosphere. It was synthesized by firing.
`
`{0060}
`{Example 19} A battery manufactured in the same manneras in Example | except that
`LISMn0.95W0.0500.02F5.96 was used as the positive electrode active material was used.
`
`{O06 1]
`As the positive electrode active material, commercially available MnFZ, WPS, and LiF were mixed
`at a molar ratio of 0.95: 0.05: 3.3 in an Ar atmosphere and kneaded in a mortar, and then mixed
`with Ar and O2 at 750° C. for 12 hours. It was synthesized byfiring in an atmosphere.
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`

`{OO62}
`Comparative Example 1 A battery manufactured in the same manner as in Example 1 except. that
`LINIO 2 was used as the positive electrode active material was used.
`
`{O063}
`The positive electrode active material was synthesized by mixing commercially available NiO and
`LIOH at a molar ratio of I: 1.1, kneading the mixture in a mortar, and firing at 750° C.for 12
`hours in an O 2 atmosphere.
`
`{OO64]
`
`The discharge characteristics of the nonaqueous electrolyte secondary battery thus obtained
`were examined under the following conditions.
`
`The battery was charged to 4.8 Vat 25° C. with a constant current of 0.01 ft.
`
`Thereafter, the battery was discharged at a constant current of 0.01 It. and the energy density
`until the terminal voltage showed 2.5 V was measured.
`
`{OO6S|I
`
`Table 1 shows the enerey densities of the positive electrode active materials manufactured in
`Examples and Comparative Examples of the present invention.
`
`This indicates that the positive electrode active material used in this example hasan extremely
`high enerey density.
`
`{OO66}
`
`{OG67)}
`
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`

`As described above, it was found that a non-aqueous electrolyte secondary battery having high
`energy density and good reversibility can be obtained by using the lithium-containing compound
`shownin the present invention as the positive electrode active material.
`
`{[O068]
`Since the nonaqueous electralyte secondary battery of the present invention has a hiph energy
`density and good reversibility, i can be used as a small secondarybattery used in portable
`electronic devices, a power source for a mobile abject, ar a secondary powersourceas a
`Stationary power source. Useful for batteries and the like.
`
`{OC69]
`DESCRIPTION OF SYMBOLS I Battery case 2 Sealing plate 3 Current collector 4 Lithium metal
`negative electrode 5 Positive electrode 6 Separator 7 Insulating gasket
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`

`HP. 2073-73797 A 2073.4, 22
`
`(18) BIKESSSTAFUP)
`
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