交联封装实现高效的水稳定锂金属负极（英文）

发布时间：2022-01-17 11:58

　　锂金属被认为是开发下一代高比能电池负极的终极选择.然而,由于金属锂固有的高化学反应活性而导致的低湿空气耐受性以及不稳定的固体电解质界面（SEI）,严重阻碍了锂金属负极的商业化应用.本文通过温度调控路易斯碱性环境下PVDF–HFP膜的交联,成功实现了锂金属负极的高效封装.得益于交联PVDF–HFP内在的疏水性以及致密的微结构,封装的锂负极表现出显著改善的水稳定性,在潮湿的空气（25°C, 30%RH）以及纯水条件下的耐受性得到了显著提升.此外,由于强极性PVDF–HFP聚合物对有机电解液的优异亲和力,封装后的锂金属负极在对称电池和全电池中均表现出更优的电化学性能.这项工作展示了一种对湿敏性碱金属电极新颖而有效的封装策略,旨在为基于碱金属的高能量密度电池的大规模、低成本应用铺平道路. 

【文章来源】：Science Bulletin. 2020,65(11)EISCICSCD

【文章页数】：8 页

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