Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Matsushita Electric Industrial Co., Ltd.

Nobuhiko Hojo

Takayuki Nakatsutsumi

Ryuichi Natsui

Hirotetsu Suzuki

Yu Ohtsuka

Akira Kano

Yukihiro Okada

Taisuke Yamamoto

Yu Otsuka

Takafumi Tsukagoshi

Atsushi Fukui

Aoi Tanaka

Masahisa Fujimoto

Junichi Sakamoto

Satoshi Shibutani

Takakazu Yamamoto

Junko Matsushita

Toshiki Nokami

Kenji Matsubara

Yuu Inatomi

Yuji Tani

Mayumi Maenishi

Norihisa Mino

Junji Niikura

Hiroyuki Matsumoto

Kohji Yuasa

Hiroki Fukumoto

Jun-ichi Yoshida

Tomoaki Yanagida

Takahisa Shimizu

Kazuyoshi Honda

Kazuhito Hatoh

Hiroshi Yoshizawa

Satoru Fujii

Mikinari Shimada

Shuji Ito

Takashi Akiyama

Shoichiro Watanabe

Masato Hosaka

Aoi Muta

Takayuki Sasaki

Kazuhiro Iida

Masanobu Takeuchi

Yumi Kondo

Yasutaka Noguchi

Junichi Yoshida

Masahiro Takahata

Tetsuyuki Okano

Yohji Misaki

Yukihiro Umetani

Akihiro Shimizu

A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a lithium ion conductive nonaqueous electrolyte, wherein the negative electrode contains graphite, an open circuit potential of the negative electrode in a fully charged state is 70 mV or less relative to lithium metal, the nonaqueous electrolyte contains a solvent, a cation, and an anion, the solvent contains a fluorine-containing cyclic carbonic acid ester, the cation includes lithium ions, and the anion includes an oxalate complex anion.

Nonaqueous electrolyte secondary battery

A secondary battery according to the present invention is provided with a positive electrode, a negative electrode and an electrolyte solution; the electrolyte solution contains water and a lithium salt; the negative electrode contains a negative electrode active material; a silane coupling agent, which is reductively decomposed at a potential that is higher than the reductive decomposition potential of water, is adhered to the surface of the negative electrode active material; and the silane coupling agent contains fluorine as a constituent element.

Secondary battery

A non-aqueous electrolyte secondary battery, wherein a negative electrode includes a negative electrode mixture layer having a thickness T and a negative electrode current collector, the negative electrode active material includes carbon and Si-containing materials, wherein when the negative electrode mixture layer is divided into a first region having a thickness of T/2 on the surface side of the negative electrode and a second region having a thickness of T/2 on the negative electrode collector side, a mass ratio of the first to the second composite material contained in the first region is >1, a mass ratio of the first composite to the second composite material contained in the second region is <1, and, in a fully charged condition, an open circuit potential of the negative electrode is 0 V or more and 70 mV or less with respect to a lithium metal.

A positive electrode active material that is a composite oxide that is represented by the general formula LiNiCoMnMO, wherein 0.9<a<1.1, 0.4≤x<1.0, 0≤y<0.4, 0≤z<0.4, 0≤b<0.2, 0.9<(x+y+z+b)<1.1, and the element M includes at least one element from the group that consists of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Al, Ga, and In. The ratio (B/A) of BET specific surface area (A) before particle compression testing and BET specific surface area (B) after particle compression testing of the composite oxide particles is 1.0-3.0.

A non-aqueous electrolyte secondary battery with a negative electrode active material including a carbon material, and a silicon-containing material in which Si particles are dispersed in a lithium ion conductive phase. The negative electrode material mixture layer having a thickness Tincludes a first region on the negative electrode surface side having a thickness of T, and a second region on the negative electrode current collector side, and the ratio T/Tis 1/20 to 19/20. The ratio of a mass ratio Mof the silicon-containing material in the first region to a mass ratio Mof the silicon-containing material in the second region is not less than 0 and less than 1. An open circuit potential of the negative electrode in a fully charged condition is higher than 0 mV and 70 mV or lower relative to lithium metal.

Non-aqueous electrolyte secondary battery

An electrolyte solution according to one aspect of the present disclosure comprises water, a lithium salt, and a polycarboxylic acid having two or more carboxylic acid groups. A secondary battery according to one aspect of the present disclosure comprises a positive electrode, a negative electrode, and the electrolyte solution.

Electrolyte and secondary battery

A battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution including an additive. The positive electrode active material includes a compound having a crystal structure belonging to a space group FM3-M and represented by Compositional Formula (1): LiMeOF, where, Me is one or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr; and subscripts x, y, &#x3b1;, and &#x3b2; satisfy the following requirements: 1.7&#x2264;x&#x2264;2.2, 0.8&#x2264;y&#x2264;1.3, 1&#x2264;&#x3b1;&#x2264;2.5, and 0.5&#x2264;&#x3b2;&#x2264;2. The additive is at least one selected from dinitrile compounds and diisocyanate compounds.

Battery

A battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution including a lithium hexafluorophosphate and an additive. The positive electrode active material includes a compound having a crystal structure belonging to a space group FM3-M and represented by Compositional Formula (1): LiMeOF. The additive is at least one selected from the group consisting of difluorophosphates, tetrafluoroborates, bis(oxalate)borate salts, bis(trifluoromethanesulfonyl)imide salts, and bis(fluorosulfonyl)imide salts.

A battery includes a positive electrode including a positive electrode active material, a negative electrode, and an electrolytic solution including a nonaqueous solvent. The positive electrode active material includes a compound having a crystal structure belonging to a space group FM3-M and represented by Compositional Formula (1): LiMeOF, where, Me is one or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr; and subscripts x, y, &#x3b1;, and &#x3b2; satisfy the following requirements: 1.7&#x2264;x&#x2264;2.2, 0.8&#x2264;y&#x2264;1.3, 1&#x2264;&#x3b1;&#x2264;2.5, and 0.5&#x2264;&#x3b2;&#x2264;2. The nonaqueous solvent includes a solvent having at least one fluoro group.

A rechargeable battery including a positive electrode, a negative electrode, and an electrolyte solution is provided. The electrolyte solution contains water and one or more lithium salts, and the lithium salts include lithium fluorophosphate.

Rechargeable battery and electrolyte solution

Provided is a battery including: a positive electrode containing a positive electrode active material; a negative electrode; and an electrolyte solution containing a nonaqueous solvent. The positive electrode active material contains a compound represented by composition formula (1) below and having a crystal structure belonging to space group FM3-M: LiMeOF. (1) Here, Me is one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and C. x, y, &#x3b1;, and &#x3b2; satisfy the following conditions: 1.7&#x2264;x&#x2264;2.2, 0.8&#x2264;y&#x2264;1.3, 1&#x2264;&#x3b1;&#x2264;2.5, and 0.5&#x2264;&#x3b2;&#x2264;2, respectively. The nonaqueous solvent includes at least one solvent selected from hydrofluoroethers, phosphazenes, phosphates, and perfluoropolyethers.

A nonaqueous electrolyte includes a nonaqueous solvent and an alkali metal salt dissolved in the nonaqueous solvent. The nonaqueous solvent contains a perfluoropolyether and a nitrile compound represented by a formula R&#x2014;CN, where Rrepresents a hydrocarbon group which has a carbon number of 2 to 4 and in which at least one hydrogen atom is substituted with fluorine.

Nonaqueous electrolyte containing perfluoropolyether and nitrile compound, and secondary battery including the same

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Osaka, Japan

Nobuhiko Hojo