材料科学
电池(电)
电极
塔菲尔方程
无定形固体
阴极
光电子学
纳米技术
电气工程
功率(物理)
电化学
热力学
化学
物理
有机化学
物理化学
工程类
作者
Justin M. Whiteley,Simon Hafner,Sang Sub Han,Seul Cham Kim,Kyu Hwan Oh,Se-Hee Lee
标识
DOI:10.1002/aenm.201600495
摘要
A new concept of pairing an active material and a mixed conductor is explored as a solid‐state battery electrode. By imbedding nano‐FeS 2 domains into an amorphous LiTiS 2 matrix, a hybrid power‐energy system is achieved while additionally improving upon many common solid electrode design flaws. High‐resolution transmission electron microscopy is used to probe the active material/mixed conductor interface over the course of cycling. Arguably the most beneficial development is enhancement of charge transfer, manifesting in a significantly increased exchange current as captured in a Tafel analysis. By developing a solution to active material isolation and creating a more homogenous electrode design, cycling at a high rate of C/2 for 500 cycles is obtained. Additionally, the electrode can recover full capacity simply by reducing system rate. Capacity recovery implicates a lack of active material isolation, a common problem in solid‐state batteries.
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