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

專利號
US10868331B2
公開日期
2020-12-15
申請人
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

As is apparent from Table 1, in the secondary batteries according to Examples 1 to 4 and 6 to 10 using the separator having a concentration of the polymeric material contained in the solid electrolyte layer of 5 mass % or more, the charge-and-discharge efficiency in the charge-and-discharge cycle was more excellent than the charge-and-discharge efficiency of the secondary battery according to Example 5 using the separator having a concentration of the polymeric material contained in the solid electrolyte layer of less than 5 mass %.

Additionally, as is apparent from Table 1, in the secondary battery according to Example 1 using the separator including the solid electrolyte layer containing an electrolyte salt, the charge-and-discharge efficiency in the charge-and-discharge cycle is more excellent than the charge-and-discharge efficiency of the secondary battery according to Example 3 using the separator including the solid electrolyte layer containing no electrolyte salt.

As can be seen from the results of Examples 1, 6, and 7, excellent performances can be obtained even if the type of the polymeric material contained in the solid electrolyte layer is changed. As can be seen from the results of Examples 1 and 9, excellent performances can be obtained even if the type of the electrolyte salt contained in the solid electrolyte layer is changed. As can be seen from the results of Examples 1 and 8, excellent performances can be obtained even if the type of the positive electrode active material is changed. As can be seen from the results of Examples 1 and 10, excellent performances can be obtained even if the type of the negative electrode active material is changed.

權(quán)利要求

1
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