电解质
阳极
阴极
硫化物
电化学
无机化学
锂(药物)
插层(化学)
化学
钠
电极
化学工程
材料科学
冶金
内分泌学
物理化学
工程类
医学
作者
Xiaowei Chi,Yanliang Liang,Hao Fang,Ye Zhang,Justin M. Whiteley,Hui Dong,Pu Hu,Se-Hee Lee,Yan Yao
标识
DOI:10.1002/anie.201712895
摘要
Abstract All‐solid‐state sodium batteries (ASSSBs) with nonflammable electrolytes and ubiquitous sodium resource are a promising solution to the safety and cost concerns for lithium‐ion batteries. However, the intrinsic mismatch between low anodic decomposition potential of superionic sulfide electrolytes and high operating potentials of sodium‐ion cathodes leads to a volatile cathode–electrolyte interface and undesirable cell performance. Here we report a high‐capacity organic cathode, Na 4 C 6 O 6 , that is chemically and electrochemically compatible with sulfide electrolytes. A bulk‐type ASSSB shows high specific capacity (184 mAh g −1 ) and one of the highest specific energies (395 Wh kg −1 ) among intercalation compound‐based ASSSBs. The capacity retentions of 76 % after 100 cycles at 0.1 C and 70 % after 400 cycles at 0.2 C represent the record stability for ASSSBs. Additionally, Na 4 C 6 O 6 functions as a capable anode material, enabling a symmetric all‐organic ASSSB with Na 4 C 6 O 6 as both cathode and anode materials.
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