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

專(zhuān)利號(hào)
US10868331B2
公開(kāi)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(lèi)
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(shuō)明書(shū)

Next, the solution mixture is sufficiently stirred using a dispersing machine such as a ball mill, thereby obtaining a slurry. Next, the slurry is applied on the first main surface of the porous self-supporting film, for example, by a doctor blade method. At this time, while the solid electrolyte particles in the slurry hardly enter the pores of the porous self-supporting film, the solvent in the slurry enters the pores of the porous self-supporting film and reaches the second main surface. Since at least a portion of the polymeric material is dissolved in the slurry, the polymeric material also reaches the second main surface from the first main surface of the porous self-supporting film, and a coating is formed on at least a portion of the second main surface. Next, the coating is dried to remove the solvent, whereby it is possible to obtain a separator including a solid electrolyte layer containing the second binder and the first binder existing on the second main surface of the porous self-supporting film.

權(quán)利要求

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