材料科学
法拉第效率
电化学
离子
空位缺陷
扩散
水溶液
阴极
电子转移
化学物理
纳米技术
化学工程
电极
结晶学
物理化学
热力学
化学
工程类
物理
有机化学
作者
Yi‐Kong Hsieh,Yu‐Chun Chuang,Hsing‐Yu Tuan
标识
DOI:10.1002/adfm.202406975
摘要
Abstract Developing cathode materials for aqueous zinc‐ion batteries (ZIBs) that offer high capacity, rapid charge–discharge rates, and prolonged cycle life remains a significant challenge. This study explores the use of zipper‐type Bi 2 O 2 Se nanoplates modified by selenium vacancy (V se ) modulation, which reduces electron scattering, enhances carrier mobility in [Bi 2 O 2 ] conducting channels, and decreases coulombic interactions within electrostatic layers. The introduction of Se vacancies facilitates electron transfer from the host to [Bi 2 O 2 ] channels and reduces scattering in the [Bi 2 O 2 ] framework, thus improving carrier mobility. These Se‐poor Bi 2 O 2 Se nanoplates demonstrate a greater affinity for zinc ions, reduced diffusion barriers, and faster transport kinetics, which enable more efficient Zn‐ion insertion, tripling the electrochemical capacity, improving rate capabilities, and extending cycling life. Enhancements such as reinforced structural integrity and expanded interlayer spaces support a dual Zn‐ion‐driven mechanism involving both insertion and conversion reactions, essential for superior electrochemical storage performance. The results include an impressive discharge/charge capacity of 380.3 mA h g −1 at 0.1 A g −1 , a cycle life of up to 10 000 cycles at 5 A g −1 , and a current tolerance exceeding 10 A g −1 . This research highlights how nano‐ and defect engineering of Bi 2 O 2 Se can significantly enhance ionic conductivity, expedite electron transfer, and improve Zn‐ion diffusion.
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