JP2023522136A - 正極片、当該正極片を含む電気化学装置及び電子装置 - Google Patents
正極片、当該正極片を含む電気化学装置及び電子装置 Download PDFInfo
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- JP2023522136A JP2023522136A JP2021541551A JP2021541551A JP2023522136A JP 2023522136 A JP2023522136 A JP 2023522136A JP 2021541551 A JP2021541551 A JP 2021541551A JP 2021541551 A JP2021541551 A JP 2021541551A JP 2023522136 A JP2023522136 A JP 2023522136A
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- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229940017219 methyl propionate Drugs 0.000 description 1
- 229940057061 mevalonolactone Drugs 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920005614 potassium polyacrylate Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002153 silicon-carbon composite material Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 239000004759 spandex Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- WMOVHXAZOJBABW-UHFFFAOYSA-N tert-butyl acetate Chemical compound CC(=O)OC(C)(C)C WMOVHXAZOJBABW-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- QHGNHLZPVBIIPX-UHFFFAOYSA-N tin(II) oxide Inorganic materials [Sn]=O QHGNHLZPVBIIPX-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- 125000001889 triflyl group Chemical group FC(F)(F)S(*)(=O)=O 0.000 description 1
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
二次電池は、高エネルギー貯蔵密度、高開回路電圧、低自己放電率、長いサイクル寿命、安全性に優れるなどの利点を有し、電気エネルギー貯蔵、携帯電子機器、電気自動車及び航空宇宙装置などの各分野に幅広く使用されている。携帯電子機器及び電気自動車の急速な発展に伴い、市場では、リチウムイオン二次電池のエネルギー密度、サイクル性能及び動力学的性能などに対する要求が益々高まっている。
具体的な技術的手段は以下の通りである。
[化1]
Li1+xNaaCo1+yAlzMgpTiuMvO2+w (1)
式(1)において、Mは、Zr、LaまたはYのうちの少なくとも1種を含み、-0.1<x<0.1、0<a<0.005、-0.05<y<0.05、0.01<z<0.05、0.001<p<0.01、0<u<0.005、0<v<0.005、-0.05<w<0.05、
[化2]
Li2+rNasN1+qO2+t (2)
式(2)において、-0.2<r<0.2、0<s≦0.05、-0.1<q<0.1、-0.05<t<0.05、Nは、Ni、Cu、Mn、Fe、Coのうちの少なくとも1種を含む。
リチウムイオン二次電池のエネルギー密度は、エネルギー密度=D0×P0/V0によって算出され、その単位は、Wh/Lである。
正極へのリチウム補充の材料を含むボタン型電池の放電比容量=放電容量/正極へのリチウム補充の材料の質量。
Claims (11)
- 正極集電体と、前記正極集電体の少なくとも1つの表面に設けられた正極活物質層とを含む正極片であって、
前記正極活物質層は、式(1)で示される第1の正極活物質及び式(2)で示される第2の正極活物質を含み、
Li1+xNaaCo1+yAlzMgpTiuMvO2+w(1)
式(1)において、Mは、Zr、LaまたはYのうちの少なくとも1種を含み、-0.1<x<0.1、0<a<0.005、-0.05<y<0.05、0.01<z<0.05、0.001<p<0.01、0<u<0.005、0<v<0.005、-0.05<w<0.05、
Li2+rNasN1+qO2+t(2)
式(2)において、-0.2<r<0.2、0<s≦0.05、-0.1<q<0.1、-0.05<t<0.05、NはNi、Cu、Mn、Fe、Coのうちの少なくとも1種を含む、正極片。 - 前記正極片の圧縮密度Pは、3.85g/cm3<P<4.35g/cm3を満たす請求項1に記載の正極片。
- 前記第1の正極活物質と前記第2の正極活物質との質量比は、4:1~200:1である請求項1に記載の正極片。
- 前記正極活物質層の合計質量に対して、前記第1の正極活物質の含有量の質量百分率は、80%~98.5%である請求項1に記載の正極片。
- 前記第1の正極活物質のDv50は、3μm~20μmであり、前記第1の正極活物質のDv90は、12μm~45μmである請求項1に記載の正極片。
- 前記第2の正極活物質のDv50は、6μm~18μmであり、前記第2の正極活物質のDv90は、15μm~32μmである請求項1または5に記載の正極片。
- 前記第2の正極活物質は、X≧300mAh/g、Y/X≦40%を満たし、
Xは、前記第2の正極活物質の初回充電比容量であり、Yは、前記第2の正極活物質の初回放電比容量である、請求項1に記載の正極片。 - 請求項1に記載の正極片であって、前記正極片は、下記(a)~(e)のうちの少なくとも1つを満たす、
(a)前記正極片の圧縮密度Pは、4.05g/cm3<P<4.30g/cm3を満たし、
(b)前記第1の正極活物質と前記第2の正極活物質との質量比は、9:1~100:1であり、
(c)前記正極活物質層の合計質量に対して、前記第1の正極活物質の含有量の質量百分率は、85%~98.5%であり、
(d)前記第1の正極活物質のDv50は、5μm~16μmであり、前記第1の正極活物質のDv90は、18μm~40μmであり、
(e)前記第2の正極活物質のDv50は、10μm~16μmであり、前記第2の正極活物質のDv90は、18μm~30μmである。 - 前記正極活物質層は、第1の正極活物質層と第2の正極活物質層とを含み、前記第1の正極活物質層は、前記第1の正極活物質を含み、前記第2の正極活物質層は、前記第2の正極活物質を含む請求項1~8のいずれか1項に記載の正極片。
- 請求項1~9のいずれか1項に記載の正極片を含む、電気化学装置。
- 請求項10に記載の電気化学装置を含む、電子装置。
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US20220310998A1 (en) | 2022-09-29 |
WO2022198667A1 (zh) | 2022-09-29 |
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