The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 2021
Filed:
Oct. 07, 2019
Toyota Jidosha Kabushiki Kaisha, Aichi-ken, JP;
Daichi Kosaka, Susono, JP;
Jun Yoshida, Mishima, JP;
Tetsuya Waseda, Tokyo-to, JP;
Takamasa Otomo, Gotemba, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken, JP;
Abstract
A main object of the present disclosure is to provide a novel active material of which volume change due to charge and discharge is small. The present disclosure achieves the object by providing a method for producing an active material having a composition represented by NaMSi(M is a metal element other than Na, x and y satisfy 0<x, 0≤y, y≤x, and 0<x+y<8), and a silicon clathrate I type crystal phase, the method comprising: a preparing step of preparing a precursor compound having the silicon clathrate I type crystal phase; and a liquid treatment step of bringing the precursor compound into contact with a polar liquid so as to desorb a Na element from the precursor compound and obtain the active material.