JPWO2012165207A1 - 非水電解質電池 - Google Patents
非水電解質電池 Download PDFInfo
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- JPWO2012165207A1 JPWO2012165207A1 JP2013517977A JP2013517977A JPWO2012165207A1 JP WO2012165207 A1 JPWO2012165207 A1 JP WO2012165207A1 JP 2013517977 A JP2013517977 A JP 2013517977A JP 2013517977 A JP2013517977 A JP 2013517977A JP WO2012165207 A1 JPWO2012165207 A1 JP WO2012165207A1
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- electrolyte battery
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- 239000011255 nonaqueous electrolyte Substances 0.000 title claims abstract description 55
- 229910000314 transition metal oxide Inorganic materials 0.000 claims abstract description 39
- 239000007774 positive electrode material Substances 0.000 claims abstract description 24
- 239000013078 crystal Substances 0.000 claims abstract description 21
- 150000005676 cyclic carbonates Chemical class 0.000 claims abstract description 13
- 150000002148 esters Chemical class 0.000 claims abstract description 11
- 239000011734 sodium Substances 0.000 claims description 42
- 229910052744 lithium Inorganic materials 0.000 claims description 38
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 37
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 30
- 229910052708 sodium Inorganic materials 0.000 claims description 30
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 claims description 11
- -1 chain carbonate ester Chemical class 0.000 claims description 8
- 238000005342 ion exchange Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- PMGBATZKLCISOD-UHFFFAOYSA-N methyl 3,3,3-trifluoropropanoate Chemical compound COC(=O)CC(F)(F)F PMGBATZKLCISOD-UHFFFAOYSA-N 0.000 claims description 5
- 150000005678 chain carbonates Chemical class 0.000 claims description 4
- 150000001733 carboxylic acid esters Chemical class 0.000 claims description 3
- GBPVMEKUJUKTBA-UHFFFAOYSA-N methyl 2,2,2-trifluoroethyl carbonate Chemical compound COC(=O)OCC(F)(F)F GBPVMEKUJUKTBA-UHFFFAOYSA-N 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 19
- 239000011572 manganese Substances 0.000 description 19
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 12
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 10
- 229910020599 Co 3 O 4 Inorganic materials 0.000 description 7
- 229910013870 LiPF 6 Inorganic materials 0.000 description 7
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 6
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 229910017052 cobalt Inorganic materials 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000634 powder X-ray diffraction Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910013553 LiNO Inorganic materials 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- FKRCODPIKNYEAC-UHFFFAOYSA-N ethyl propionate Chemical compound CCOC(=O)CC FKRCODPIKNYEAC-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 150000002500 ions Chemical group 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910018871 CoO 2 Inorganic materials 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013716 LiNi Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- RJUFJBKOKNCXHH-UHFFFAOYSA-N Methyl propionate Chemical compound CCC(=O)OC RJUFJBKOKNCXHH-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- ZMIGMASIKSOYAM-UHFFFAOYSA-N cerium Chemical compound [Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce][Ce] ZMIGMASIKSOYAM-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940093499 ethyl acetate Drugs 0.000 description 1
- CYEDOLFRAIXARV-UHFFFAOYSA-N ethyl propyl carbonate Chemical compound CCCOC(=O)OCC CYEDOLFRAIXARV-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- RCIJMMSZBQEWKW-UHFFFAOYSA-N methyl propan-2-yl carbonate Chemical compound COC(=O)OC(C)C RCIJMMSZBQEWKW-UHFFFAOYSA-N 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01M10/052—Li-accumulators
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- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
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- H01—ELECTRIC ELEMENTS
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
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- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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Abstract
Description
〔試験セルの作製〕
<実施例1>
NaNO3、Co3O4、及びMn2O3をNa0.7Co5/6Mn1/6O2の化学量論比に合うように混合した。その後、空気中において900℃で10時間保持することによって、ナトリウム含有遷移金属酸化物を得た。
4,5−ジフルオロエチレンカーボネート(DFEC)とメチル3,3,3−トリフルオロプロピオネート(F−MP)とを体積比が2:8になるように混合した非水電解液に、LiPF6を1.0mol/lの濃度になるように溶解させたものを非水電解質として用いたこと以外は、実施例1と同様にして試験セルを作製した。
4−フルオロエチレンカーボネート(FEC)とメチル2,2,2−トリフルオロエチルカーボネート(F−EMC)とを体積比が2:8となるように混合した非水電解液に、LiPF6を1.0mol/lの濃度になるように溶解させたものを非水電解質に用いたこと以外は、実施例1と同様にして試験セルを作製した。
エチレンカーボネート(EC)とエチルメチルカーボネート(EMC)とを体積比が2:8になるように混合した非水電解液に、LiPF6を1.0mol/lの濃度になるように溶解させたものを非水電解質として用いたこと以外は、実施例1と同様にして試験セルを作製した。
Li2CO3及びCo3O4を混合し、空気中において900℃で10時間保持することによって、LiCoO2を得た。得られたLiCoO2は、粉末X線回折法により分析を行った結果、空間群R−3mに属する結晶構造を有することが分かった。
エチレンカーボネート(EC)とエチルメチルカーボネート(EMC)とを体積比が2:8となるように混合した非水電解液に、LiPF6を1.0mol/lの濃度になるように溶解させたものを非水電解質として用いたこと以外は、比較例2と同様にして試験セルを作製した。表1に各試験セルの詳細を示す。
実施例1〜3及び比較例1〜3の各試験セルについて、0.2Itの定電流で正極電位が4.8V(vs.Li/Li+)(比較例2、3については4.6V(vs.Li/Li+))に達するまで充電した後、4.8V(vs.Li/Li+)(比較例2、3については4.6V(vs.Li/Li+))の定電圧で、電流値が0.05Itに達するまで充電した。その後、0.2Itの定電流で正極電位が3.2V(vs.Li/Li+)に達するまで放電を行った。このときの放電容量を充電容量で除した値に100をかけて充放電効率(%)を計算した結果を表2に示す。
〔試験セルの作製〕
<実施例4>
Li2CO3、NaNO3、Co3O4、及びMn2O3をNa0.7Li0.025Co10/12Mn2/12O2の化学量論比に合うように混合した。その後、空気中において900℃で10時間保持することによって、ナトリウム含有遷移金属酸化物を得た。
Li2CO3、NaNO3、Co3O4、及びMn2O3をNa0.7Li0.05Co10/12Mn2/12O2の化学量論比に合うように混合したこと以外は、実施例4と同様にして試験セルを作製した。
Li2CO3、NaNO3、Co3O4、及びMn2O3をNa0.7Li0.075Co10/12Mn2/12O2の化学量論比に合うように混合したこと以外は、実施例4と同様にして試験セルを作製した。
Li2CO3、NaNO3、Co3O4、及びMn2O3をNa0.7Li0.05Co10/12Mn2/12O2の化学量論比に合うように混合した。その後、空気中において800℃で10時間保持することによって、ナトリウム含有遷移金属酸化物を得た。以降、実施例4と同様にして試験セルを作製した。
エチレンカーボネート(EC)とジエチルカーボネート(DEC)とを体積比が3:7になるように混合した非水電解液に、LiPF6を1.0mol/lの濃度になるように溶解させたものを非水電解質として用いたこと以外は、実施例4〜7と同様にして試験セルを作製した。
実施例4〜7及び比較例4〜7の各試験セルについて、0.2Itの定電流で正極電位が4.8V(vs.Li/Li+)に達するまで充電した後、4.8V(vs.Li/Li+)の定電圧で、電流値が0.05Itに達するまで充電した。その後、0.2Itの定電流で正極電位が3.2V(vs.Li/Li+)に達するまで放電を行った。このときの放電容量を充電容量で除した値に100をかけて充放電効率(%)を計算した結果を表4に示す。
2…対極
3…参照極
4…セパレーター
5…非水電解質
6…容器
7…集電タブ
Claims (10)
- 正極活物質を含む正極と、負極と、非水電解質とを備える非水電解質電池であって、
前記正極活物質が、空間群P63mcに属する結晶構造を有するリチウム含有遷移金属酸化物を含み、
前記非水電解質が、フッ素化環状炭酸エステルとフッ素化鎖状エステルとを含む、ことを特徴とする非水電解質電池。 - 前記リチウム含有遷移金属酸化物が、Lix1Nay1CoαMβOγ(0<x1<1.1、0<y1≦0.05、0.75≦α<1、0<β≦0.25、1.9≦γ≦2.1、MはCo以外の金属元素で少なくともMnを含む)で表されることを特徴とする、請求項1に記載の非水電解質電池。
- 前記リチウム含有遷移金属酸化物が、Lix2Nay2CoαMβOγ(0≦x2≦0.1、0.66<y2<0.75、0.75≦α<1、0<β≦0.25、1.9≦γ≦2.1、MはCo以外の金属元素で少なくともMnを含む)で表されるナトリウム含有酸化物に含まれるナトリウムの一部をリチウムでイオン交換することによって得られるリチウム含有遷移金属酸化物であることを特徴とする、請求項1又は2に記載の非水電解質電池。
- 前記x2が0.025≦x2≦0.050であることを特徴とする、請求項3に記載の非水電解質電池。
- 前記フッ素化環状炭酸エステルが、4−フルオロエチレンカーボネート又は4,5−ジフルオロエチレンカーボネートの少なくとも一方を含むことを特徴とする、請求項1〜4のいずれか1項に記載の非水電解質電池。
- 前記フッ素化鎖状エステルが、フッ素化鎖状カルボン酸エステル又はフッ素化鎖状炭酸エステルの少なくとも一方を含むことを特徴とする、請求項1〜5のいずれか1項に記載の非水電解質電池。
- 前記フッ素化鎖状カルボン酸エステルが、メチル3,3,3−トリフルオロプロピオネートを含むことを特徴とする、請求項6に記載の非水電解質電池。
- 前記フッ素化鎖状炭酸エステルが、メチル2,2,2−トリフルオロエチルカーボネートを含むことを特徴とする、請求項6又は7に記載の非水電解質電池。
- 前記リチウム含有遷移金属酸化物が、Lix1Nay1CoαMβOγ(0<x1<0.1、0<y1≦0.05、0.75≦α<1、0<β≦0.25、1.9≦γ≦2.1、MはCo以外の金属元素で少なくともMnを含む)で表されることを特徴とする、請求項1〜8のいずれか1項に記載の非水電解質電池。
- 正極電位が4.6V(vs.Li/Li+)を超えるまで充電されることを特徴とする、請求項1〜9のいずれか1項に記載の非水電解質電池。
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