Polymer Blend Electrolytes for Batteries and Beyond
Polymer Blend Electrolytes for Batteries and Beyond
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DOI：
10.1021/acs.iecr.1c02938
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发表时间：
2021-11
影响因子：
4.2
通讯作者：
Michael P. Blatt;D. Hallinan
中科院分区：
文献类型：
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作者：
Michael P. Blatt;D. Hallinan
聚合物混合电解质正在重新崛起，成为一类令人兴奋的工业相关电解质。它们用聚合物取代了传统电解液中的溶剂和盐：分别称为聚溶剂和聚电解质。在锂电池的情况下，聚电解质是聚阴离子，在被多溶剂解离时释放出锂离子。这篇综述定义了电解液的类别，提供了基准和衡量标准以供比较，介绍了聚合物混合物的背景，并详细回顾了过去17年来关于混合型电解液的报告。特别是与单离子导电聚阴离子混合的聚醚型聚溶剂，以及与锂盐混合的生物基聚溶剂混合物。少数未完成的报告符合基于聚合物的基准，但仍比锂电池的液体电解液低一个数量级。因此，对重大突破的可能性进行了展望，并提出了进一步研究的建议，如机械性能的确定。目前，聚合物共混电解液在高能量密度但低功率电池方面具有很大的潜力。
Polymer blend electrolytes are reemerging as an exciting class of industrially relevant electrolytes. They replace both the solvent and the salt of conventional electrolytes with polymers: termed polysolvents and polyelectrolytes, respectively. In the case of lithium batteries, the polyelectrolytes are polyanions that release lithium ions upon dissociation by polysolvents. This review defines classes of electrolytes, provides benchmarks and metrics for comparison, gives a background on polymer blends, and provides a detailed review of reports on blend-based electrolytes over the past 17 years. In particular, polyether-based polysolvents blended with single-ion conducting polyanions are covered, as well as biobased polysolvent blends mixed with lithium salts. A few outstanding reports meet polymer-based benchmarks but remain an order of magnitude below liquid electrolytes for lithium batteries. Therefore, an outlook is provided on possibilities for a major breakthrough, as are recommendations for further investigation, such as the determination of mechanical properties. Currently, polymer blend electrolytes hold great potential for high energy density but low power batteries.