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- Title
Activating Inert Metallic Compounds for High‐Rate Lithium–Sulfur Batteries Through In Situ Etching of Extrinsic Metal.
- Authors
Zhao, Meng; Peng, Hong‐Jie; Zhang, Ze‐Wen; Li, Bo‐Quan; Chen, Xiao; Xie, Jin; Chen, Xiang; Wei, Jun‐Yu; Zhang, Qiang; Huang, Jia‐Qi
- Abstract
Surface reactions constitute the foundation of various energy conversion/storage technologies, such as the lithium–sulfur (Li‐S) batteries. To expedite surface reactions for high‐rate battery applications demands in‐depth understanding of reaction kinetics and rational catalyst design. Now an in situ extrinsic‐metal etching strategy is used to activate an inert monometal nitride of hexagonal Ni3N through iron‐incorporated cubic Ni3FeN. In situ etched Ni3FeN regulates polysulfide‐involving surface reactions at high rates. Electron microscopy was used to unveil the mechanism of in situ catalyst transformation. The Li‐S batteries modified with Ni3FeN exhibited superb rate capability, remarkable cycling stability at a high sulfur loading of 4.8 mg cm−2, and lean‐electrolyte operability. This work opens up the exploration of multimetallic alloys and compounds as kinetic regulators for high‐rate Li‐S batteries and also elucidates catalytic surface reactions and the role of defect chemistry.
- Subjects
LITHIUM sulfur batteries; NITRIDES; CHEMICAL kinetics; METAL compounds; METAL etching
- Publication
Angewandte Chemie, 2019, Vol 131, Issue 12, p3819
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201900312