异质结
材料科学
锌
化学工程
离子
水溶液
纳米技术
化学
光电子学
物理化学
冶金
有机化学
工程类
作者
Yalei Wang,Jun Song,Wai‐Yeung Wong
标识
DOI:10.1002/anie.202218343
摘要
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 Zn2+ 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 .
科研通智能强力驱动
Strongly Powered by AbleSci AI