异质结
电化学
材料科学
插层(化学)
锌
电导率
化学工程
离子
结构稳定性
电阻率和电导率
水溶液
电极
电池(电)
阴极
无机化学
化学
光电子学
物理化学
冶金
有机化学
功率(物理)
物理
电气工程
结构工程
量子力学
工程类
作者
Yalei Wang,Jun Song,Wai Yeung Wong
标识
DOI:10.1002/anie.202218343
摘要
Abstract Two‐dimensional metal–organic frameworks (2D MOFs) can be used as the cathodes for high‐performance zinc‐ion battery due to their large one‐dimensional channels. However, the conventionally poor electrical conductivity and low structural stability hinder their advances. Herein, we report an alternately stacked MOF/MX heterostructure, exhibiting the 2D sandwich‐like structure with abundant active sites, improved electrical conductivity and exceptional structural stability. Ex situ characterizations and theoretical calculations reveal a reversible intercalation mechanism of zinc ions and high electrical conductivity in the 2D heterostructure. Electrochemical tests confirm excellent Zn 2+ migration kinetics and ideal pseudocapacitive behaviors. As a consequence, Cu‐HHTP/MX shows a superior rate performance (260.1 mAh g −1 at 0.1 A g −1 and 173.1 mAh g −1 at 4 A g −1 ) and long‐term cycling stability of 92.5 % capacity retention over 1000 cycles at 4 A g −1 .
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