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`Docket No.: P201064US00
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`AMENDMENTS TO THE CLAIMS
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`This listing of claims replaces all prior versions of claims in the application.
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`Listing of Claims:
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`1.
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`(Currently Amended) A secondary battery comprising a negative electrode
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`containing a silicon composite particle which includesa lithium silicate phase andsilicon particles
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`dispersed in the lithium silicate phase, and
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`an electrolytic solution containing a fluorine-containing linear carboxylic acid ester
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`represented by R'-(CO)O-CH-R? (wherein R'is an alkyl group and R’is an alkyl group in which
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`at least one hydrogen atom is substituted with fluorine),
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`wherein the electrolytic solution further contains 2-chloro-1,1-difluoroethyl-2,2,2-
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`trifluoroethyl ether.
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`2.
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`(Original) The secondary battery according to Claim 1, wherein the fluorine-
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`containing linear carboxylic acid ester contains 2,2,2-trifluoroethyl acetate.
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`3.
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`(Previously Presented) The secondary battery according to Claim 1, wherein the
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`electrolytic solution further contains methyl 3,3,3-trifluoropropionate.
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`4.
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`5.
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`(Canceled)
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`(Previously Presented) The secondary battery according to Claim 1, wherein, in the
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`lithium silicate phase, a half-width of a diffraction peak of a (111) plane oflithium silicate phase
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`in an XRD pattern measured through X-ray diffraction analysis is 0.05° to 0.55°.
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`
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`Application No.: 17/056,229
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`Docket No.: P201064US00
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`6.
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`(Previously Presented) The secondary battery according to Claim 1, wherein atleast
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`a portion of a surface of the silicon composite particle is coated with a conductive material.
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