Toyota Jidosha Kabushiki Kaisha

Tokyo Institute of Technology

Kunihiro Nobuhara

Shigenori Hama

Jun Yoshida

Yuki Kato

Koji Kawamoto

Hideki Nakayama

Ryoji Kanno

Takamasa Otomo

Masaaki Hirayama

Yoshiumi Kawamura

Tomoya Matsunaga

Makio Kon

A lithium secondary battery is provided which can exhibit excellent battery performances for a long period of time and has an excellent crystal structure stability. The positive electrode of the lithium secondary battery provided according to the present invention includes positive electrode active material particles mainly containing a lithium-containing phosphate compound represented by the general formula: LiM[PA]O, where M is one or two or more elements selected from the group consisting of Ni, Mn, Fe and Co; A is a pentavalent metal element; and x and y are real numbers satisfying 0&#x3c;x&#x2266;2 and 0&#x3c;y&#x2266;0.15.

Lithium secondary battery and method for producing same

The problem of the present invention is to provide a sulfide solid electrolyte material having excellent ion conductivity. The present invention solves the problem by providing a sulfide solid electrolyte material comprising an Melement (such as a Li element), an Melement (such as a Ge element and a P element), and an S element; having a peak in a position of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; in an X-ray diffraction measurement using a CuK&#x3b1; line; and having an I/Ivalue of less than 0.50 when a diffraction intensity at the peak of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; is represented by Iand a diffraction intensity at a peak of 2&#x3b8;=27.33&#xb0;&#xb1;0.50&#xb0; is represented by I.

Sulfide solid electrolyte material, battery, and method for producing sulfide solid electrolyte material

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Susono, Japan

Kunihiro Nobuhara