An in-depth study of heteroatom boosted anode for potassium-ion batteries
An in-depth study of heteroatom boosted anode for potassium-ion batteries
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钾离子电池杂原子增强阳极的深入研究
DOI：
10.1016/j.nanoen.2020.105294
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发表时间：
2020-12
期刊：
影响因子：
17.6
通讯作者：
Yingpeng Wu
中科院分区：
文献类型：
--
作者：
Chao Shen;Ganqiang Song;Xiuli Zhu;Dong Wang;Lu Huang;Zhenhe Sun;Yingpeng Wu
Metal sulfide materials have been investigated extensively as anodes for alkali metal ion batteries. In this work, the N-doped graphene/bismuth sulfide (NGBS) composites are prepared for potassium-ion batteries (PIBs) anode and deliver an excellent electrochemical performance in K-ion storage. The N-doped graphene armor can accommodate the large volume variation and the weak electrical conductivity of the bismuth sulfide electrode, but also provides more active sites for K-ion storage which obviously enhances the specific capacity. Moreover, the active sites of the graphene play a crucial role in restricting the “shuttle effect” of polysulfide by forming C–S bonds reversibly during electrochemical redox process and achieve the stable electrochemical cycles as a hybrid anode for PIBs. The K-ion insertion/deinsertion and the reversible C–S bonds formation of the NGBS electrode during the electrochemical cyclic process are revealed by thein-situX-ray diffraction,in-situRaman spectroscopy, cyclic voltammetry and X-ray photoelectron spectroscopy in detailed.
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