Tokyo Institute of Technology

Toyota Jidosha Kabushiki Kaisha

Other

Matsushita Electric Industrial Co., Ltd.

Sumitomo Chemical Company, Limited

Toda Kogyo Corporation

Ricoh Company, Ltd.

Okayama University

Tokyo Jidosha Kabushiki Kaisha

Ryoji Kanno

Masaaki Hirayama

Satoshi Hori

Yuki Kato

Mikio Takano

Shigeo Kondo

Kazunori Takada

Tatsuya Nakamura

Takamasa Otomo

Kota Suzuki

Koji Kawamoto

Hisatsugu Yamasaki

Shinya Shiotani

Shigenori Hama

Takayuki Kaneko

Yuki Inoue

Jun Takada

Hajime Yuzurihara

Takamasa Ohtomo

Yuichiro Imanari

Kenji Nakane

Shigeo Takeuchi

Keiichi Minami

Mitsuru Sakano

Tatsuo Fujii

Makoto Nakanishi

Yoshihiro Kawakami

Hideki Hashimoto

Kunihiro Nobuhara

Genki Kobayashi

Yulong Sun

Huang Wenze

Makoto Yoshioka

A main object of the present disclosure is to provide a sulfide solid electrolyte capable of suppressing a decrease in Li ion conductivity due to moisture. The present disclosure achieves the object by providing a sulfide solid electrolyte comprising a Li element, a P element, a S element and an O element, and having a granular shape, and including a crystal portion oriented along the granular shape, on an inner surface of the sulfide solid electrolyte.

Sulfide solid electrolyte and all solid state battery

A sulfide solid electrolyte is capable of suppressing a decrease in Li ion conductivity due to moisture. A sulfide solid electrolyte includes a Li element, a P element, a S element and an O element, and having a granular shape, and including a crystal portion oriented along the granular shape, on an inner surface of the sulfide solid electrolyte.

Provided is a sulfide solid electrolyte material which has a composition that does not contain Ge, while having a smaller Li content than conventional sulfide solid electrolyte materials, and which has both lithium ion conductivity and chemical stability at the same time. A sulfide solid electrolyte which has a crystal structure represented by composition formula (LiSn)(SiSn)(PSi)S(wherein &#x3b1;&#x2264;0.67, &#x3b2;&#x2264;0.33 and 0.43&#x3c;&#x3b1;+&#x3b2; (provided that 0.23&#x3c;&#x3b1;&#x2264;0.4 when &#x3b2;=0.2 and 0.13&#x3c;&#x3b1;&#x2264;0.4 when &#x3b2;=0.3 may be excluded)), or a crystal structure represented by composition formula LiSiPS(wherein 0.1&#x2264;&#x3b3;&#x3c;0.3).

Sulfide solid electrolyte

The problem of the present invention is to provide a sulfide solid electrolyte material with favorable reduction resistance. The present invention solves the problem by providing a sulfide solid electrolyte material having a peak at a position of 2&#x3b8;=30.26&#xb0;&#xb1;1.00&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; ray, and having a composition of LiSiPSO(a=1&#x2212;x+y, 0.65&#x2264;x&#x2264;0.75, &#x2212;0.025&#x2264;y&#x2264;0.1, &#x2212;0.2&#x2264;z&#x2264;0).

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

(Problem to be Solved) The present invention was made in view of the above-described problems, with an object of providing a Li&#x2014;P&#x2014;S-based sulfide solid electrolyte material with both excellent electrochemical stability and a high lithium ion conductivity, providing a method of producing the Li&#x2014;P&#x2014;S-based sulfide solid electrolyte material, and providing a lithium battery including the sulfide solid electrolyte material. (Solution) There is provided a sulfide solid electrolyte material including a Li element, a P element, and a S element and having peaks at positions of 2&#x3b8;=17.90&#xb1;0.20, 29.0&#xb1;0.50, and 29.75&#xb1;0.25' in powder X-ray diffraction measurement using a Cu-K&#x3b1; ray having an X-ray wavelength of 1.5418 &#x212b;, in which assuming that the diffraction intensity of the peak at 2&#x3b8;=17.90&#xb1;0.20 is Iand the diffraction intensity of the peak at 2&#x3b8;=18.50&#xb1;0.20 is I, a value of I/Iis less than 0.50.

Solid &#x3b1;-lithium electrolyte

(Problem to be Solved) A solid electrolyte material with favorable ion conductivity is demanded from the viewpoint of the higher output of a battery. The present invention was made in view of the above-described problems, with an object of providing a sulfide solid electrolyte material with favorable Li ion conductivity and providing a lithium battery including the sulfide solid electrolyte material. (Solution) There are provided: a solid electrolyte including a sulfide-based solid electrolyte represented by a composition formula: (LiS)(MS)(PS), in which M is at least one selected from the group consisting of Ge, Sb, Si, Sn, B, Al, Ga, In, Zr, V, and Nb, and 0.53&#x2264;x&#x2264;0.74, 0.13&#x2264;y&#x2264;0.37, 0.04&#x2264;z&#x2264;0.15, and x+y+z=1 are satisfied; and a lithium battery including the solid electrolyte.

Lithium solid electrolyte

A sulfide solid electrolyte material has favorable ion conductivity and resistance to reduction. The sulfide solid electrolyte material includes a peak at a position of 2&#x3b8;=29.86&#xb0;&#xb1;1.00&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; ray, and a composition of LiPS(0.1&#x2264;y&#x2264;0.175).

In order to improve the stability of an electrolyte, an object of the present disclosure is to develop, among the sulfide solid electrolytes of Li&#x2014;P&#x2014;S&#x2014;O based containing no metal element other than lithium, a new solid electrolyte having a possibility to have high ion conductivity and a method for producing for obtaining the same easily. The present disclosure achieves the object by providing a solid electrolyte material including a sulfide composition represented by a composition formula LiPPSO(LiPSO), wherein 0.6&#x2264;x&#x3c;1, 0&#x2264;z&#x2264;0.2, and &#x2212;0.025&#x2264;y&#x2264;0.1, and a method for producing the same.

Solid electrolyte material and method for producing the same

To improve the stability of an electrolyte, among the sulfide solid electrolytes of Li&#x2014;P&#x2014;S&#x2014;X based (X is at least one of F, Cl, N and OH) containing no metal element other than lithium, a new solid electrolyte having a possibility to have high ion conductivity and a method for producing for obtaining the same easily. The disclosure achieves the object by providing a solid electrolyte material including a sulfide composition represented by a composition formula Li4&#x2212;4y&#x2212;x&#x2212;zP4+1+y&#x2212;xP5+xS4&#x2212;zXz (Li4&#x2212;4y&#x2212;x&#x2212;zP1+yS4&#x2212;zXz), wherein 0.2&#x2264;x&#x3c;1.0, 0&#x2264;z&#x2264;0.2, and 0&#x2264;y&#x2264;0.075, and X is at least one of F, Cl, N and OH, and the solid electrolyte material has a peak at a position of 2&#x3b8;=17.8&#xb0;&#xb1;0.1&#xb0;, 19.1&#xb0;&#xb1;0.1&#xb0;, 21.7&#xb0;&#xb1;0.1&#xb0;, 23.8&#xb0;&#xb1;0.1&#xb0; and 30.85&#xb0;&#xb1;0.1&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; ray, and method for producing the same.

The present invention aims to provide a sulfide solid electrolyte material with favorable ion conductivity, in which charge and discharge efficiency may be inhibited from decreasing. The object is attained by providing a sulfide solid electrolyte material, including: a Li element; a P element; and a S element, characterized in that the material has a peak at a position of 2&#x3b8;=30.21&#xb0;&#xb1;0.50&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; ray, and the sulfide solid electrolyte material does not substantially include a metallic element belonging to the third group to the sixteenth group.

A main object of the present invention is to provide a sulfide solid electrolyte material having favorable ion conductivity and low reduction potential. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material including an Melement (such as a Li element), an Melement (such as a Ge element, a Si element and a P element) and a S element, wherein the material has a peak at a position of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; line; and when a diffraction intensity at the peak of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; is regarded as Iand a diffraction intensity at a peak of 2&#x3b8;=27.33&#xb0;&#xb1;0.50&#xb0; is regarded as I, a value of I/Iis less than 0.50, and Mcontains at least P and Si.

A main object of the present disclosure is to provide a sulfide solid electrolyte material with favorable Li ion conductivity. To achieve the above object, the present disclosure provides a sulfide solid electrolyte material comprising a composition of LiAlSiS(0&#x3c;x&#x3c;1), and having a peak at a position of 2&#x3b8;=25.19&#xb0;&#xb1;1.00&#xb0;, 29.62&#xb0;&#xb1;1.00&#xb0;, 30.97&#xb0;&#xb1;1.00&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; ray.

The problem is to provide a sulfide solid electrolyte material with favorable Li ion conductivity in a low-temperature environment. The problem is overcome by providing a sulfide solid electrolyte material comprising an Melement (such as an Li element and an Mg element), an Melement (such as a Ge element and a P element) and a S element, wherein the sulfide solid electrolyte material has a peak at a position of 2&#x3b8;=29.58&#xb0;&#xb1;0.50&#xb0; in X-ray diffraction measurement using a CuK&#x3b1; ray, does not have a peak at a position of 2&#x3b8;=27.33&#xb0;&#xb1;0.50&#xb0; or slightly having the peak, and a substituted amount &#x3b4;(%) of the divalent element in the Melement is in such a range that the sulfide solid electrolyte material exhibits higher Li ion conductance at 0&#xb0; C. than the case of &#x3b4;=0.

Provided is a sulfide-based solid electrolyte, including: a Na element; a Ge element; a P element; and a S element, wherein an atomic percentage (at. %) of each of the Na element, the Ge element, the P element, and the S element is as follows when a total of the respective elements is 100 at. %,

Solid electrolyte and secondary battery

This invention relates to an anode active material comprising at least one iron oxide selected from the group consisting of amorphous iron oxides, ferrihydrite, and lepidocrocite. The invention also relates to a lithium ion secondary battery anode material comprising the anode active material as a constituent component, a lithium ion secondary battery anode comprising the lithium ion secondary battery anode material, and a lithium ion secondary battery comprising the lithium ion secondary battery anode.

Growing community of inventors

Yokohama, Japan

Ryoji Kanno