Tdk Corporation

Hirofumi Kakuta

Hideaki Seki

Shin Fujita

Takashi Sasaki

Takeo Tsukada

Taisuke Masuko

Akinobu Nojima

Teiichi Tanaka

Tomohiko Hasegawa

Yusuke Kume

Tetsu Syoji

A non-aqueous electrolyte for a lithium ion secondary battery capable of improving rate characteristics, and the lithium ion secondary battery using the same. The non-aqueous electrolyte for the lithium ion secondary battery includes a carboxylic acid ester and 2.0&#xd7;10to 3.0&#xd7;10mol/L of halide ion other than fluoride ion.

Non-aqueous electrolyte for lithium ion secondary battery and lithium ion secondary battery using same

In this non-aqueous electrolyte secondary battery, a positive terminal and a negative terminal extend in a first direction, protrude from a laminated cell stack, and are provided so that a center line is interposed therebetween, the center line passing through a midpoint of both ends of the laminated cell stack in a second direction orthogonal to the first direction and extending in the first direction when the laminated cell stack is seen in plan view, and a first terminal with higher heat dissipation efficiency among the positive terminal and the negative terminal is provided in a location closer to the center line than a location of a second terminal with lower heat dissipation efficiency among the positive terminal and the negative terminal.

Non-aqueous electrolyte secondary battery

A positive electrode includes: a positive electrode current collector; and a positive electrode active material layer disposed on the positive electrode current collector. The positive electrode active material layer contains a lithium-containing transition metal oxide represented by composition formula (1) indicated below, and a compound represented by LiVOPO4. The lithium-containing transition metal oxide and the compound represented by LiVOPO4 are dispersed in the positive electrode active material layer.LiNiCoAlO2&#x2003;&#x2003;(1)where 0.9&#x2264;t&#x2264;1.1, 0.3&#x3c;x&#x3c;0.99, 0.01&#x3c;y&#x3c;0.4, 0.001&#x3c;z&#x3c;0.2, and x+y+z=1.

Positive electrode and lithium ion secondary battery

A Li-ion conductive oxide ceramic material including a garnet-type or similar crystal structure according to an aspect of the present disclosure contains Li, La, Zr, and O, the material further containing one or more elements selected from the group consisting of rare-earth elements. A Li-ion conductive oxide ceramic material including a garnet-type or similar crystal structure according to the other aspects of the present disclosure is represented by the following composition formula (1) LiLaZrAOwhere A is one or more elements selected from the group consisting of rare-earth elements, and x is a number such that 0&#x3c;x&#x2264;0.5.

Li-ion conductive oxide ceramic material including garnet-type or similar crystal structure

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Tokyo, Japan

Hirofumi Kakuta