聚丙烯腈
材料科学
电解质
阴极
电池(电)
相间
电化学
电极
锂(药物)
化学工程
纳米技术
溶解
复合材料
聚合物
电气工程
化学
生物
物理
工程类
内分泌学
物理化学
功率(物理)
医学
量子力学
遗传学
作者
Xianhui Zhang,Peiyuan Gao,Zhaohui Wu,Mark H. Engelhard,Xia Cao,Hao Jia,Yaobin Xu,Haodong Liu,Chongmin Wang,Jun Liu,Ji‐Guang Zhang,Haodong Liu,Wu Xu
标识
DOI:10.1021/acsami.2c16890
摘要
Sulfurized polyacrylonitrile (SPAN) represents one of the most promising directions for high-energy-density lithium (Li)-sulfur batteries. However, the practical application of Li||SPAN is currently limited by the insufficient chemical/electrochemical stability of electrode/electrolyte interphase (EEI). Here, a pinned EEI layer is designed for stabilizing a SPAN cathode by regulating the EEI formation mechanism in an advanced LiFSI/ether/fluorinated-ether electrolyte. Computational simulations and experimental investigations reveal that, benefiting from the nonsolvating nature, the fluorinated-ether can not only act as a protective shield to prevent the Li polysulfides dissolution but also, more importantly, endow a diffusion-controlled EEI formation process. It promotes the formation of a uniform, protective, and conductive EEI layer pinning into SPAN surface region, enabling the high loading Li||SPAN batteries with superior cycling stability, wide temperature performance, and high-rate capability. This design strategy opens an avenue for exploring advanced electrolytes for Li||SPAN batteries and guides the interface design for broad types of battery systems.
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