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改进离子电池,通过替换聚乙烯基铁甲酸凝卷带

Anu Adamson¹, Kenneth Tuul^2,3, Tom Bötticher²

¹Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada.

Nature materials

|September 22, 2023

概括

离子电池中的聚乙烯二甲酸带可以脱聚合,导致自放电. 将其替换为稳定的聚烯带可以消除 LiFePO4-石墨电池中的这个问题.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
化学工程是化学工程的重要组成部分.

背景情况:

聚乙烯二甲 (PET) 带对于离子电池组装至关重要,防止电极解.
尽管PET在电池电解质中的化学稳定性很重要,但它经常被忽视.
聚乙烯脱聚合可以通过氧化还原穿形成导致自我放电.

研究的目的:

为了研究PET在离子电池电解质中的化学稳定性.
在典型的细胞条件下确定PET的分解机制.
为电池制造寻找替代性稳定聚合物.

主要方法:

进行了化学选实验,以探测PET分解.
使用了从二甲基碳酸盐中在现场生成的甲醇和甲氧化物.
聚烯和聚胺 (Kapton) 被选为电解质稳定性.

主要成果:

聚乙烯 (PET) 脱聚合成二甲基甲基甲甲酸盐,作为氧化还原送运器.
甲醇和甲氧化是PET分解中的关键中间体.
聚烯和聚胺在电解质中表现出极好的稳定性.

结论:

由于化学不稳定性,PET带在离子电池中存在自放电的风险.
聚烯和聚胺是PET带的可行,稳定的替代品.
将PET带替换为聚烯带可以消除LiFePO4-石墨细胞中的可逆自放电.

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