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Secondary battery, battery pack, vehicle, and stationary power supply

專利號(hào)
US10868331B2
公開日期
2020-12-15
申請(qǐng)人
KABUSHIKI KAISHA TOSHIBA（JP Minato-ku）
發(fā)明人
Yasuyuki Hotta; Shinsuke Matsuno; Norio Takami
IPC分類
H01M4/02; H01M10/0565; B60L58/10; H01M2/16; H01M10/0525; H01M10/0585; H01M10/42
技術(shù)領(lǐng)域
electrode,separator,battery,negative,solid,positive,in,layer,material,secondary
地域： Minato-ku

摘要

According to one embodiment, a secondary battery is provided. The separator includes a porous self-supporting film, a solid electrolyte layer, and a first binder. The solid electrolyte layer is provided on one main surface of the porous self-supporting film. The porous self-supported film and the solid electrolyte layer are adhered with the first binder. The first binder exists on both of the one main surface and another main surface of the porous self-supporting film. The solid electrolyte layer includes solid electrolyte particles and a second binder. The solid electrolyte particles have alkali metal ions conductivity. The polymeric material of the second bonder is a same as the polymeric material of the first material.

說明書

The polymeric material preferably contains at least one material selected from the group consisting of polyvinyl formal, polyvinyl alcohol, polyvinyl acetal, polyvinyl butyral, polymethyl methacrylate, and polytetrafluoroethylene.

Examples of structural formulas of compounds usable as the polymeric material will be described below.

The structural formula of polyvinyl formal is as follows. In the formula, preferably, a is 50 to 80, b is 0 to 5, and c is 15 to 50.

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The structural formula of polyvinyl butyral is as follows. In the formula, preferably, 1 is 50 to 80, m is 0 to 10, and n is 10 to 50.

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The structural formula of polyvinyl alcohol is as follows. In the formula, preferably, n is 70 to 20,000.

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The structural formula of polymethyl methacrylate is as follows. In the formula, preferably, n is 30 to 10,000.

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權(quán)利要求

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