亚胺
金属有机骨架
共价键
电化学
混合材料
化学
化学工程
共价有机骨架
电解质
氧化还原
阳极
材料科学
高分子化学
催化作用
金属
无机化学
吸附
有机化学
电极
物理化学
工程类
作者
Lu Zhao,Xuxu Tang,Liping Lv,Shuangqiang Chen,Weiwei Sun,Yong Wang
出处
期刊:Chemsuschem
[Wiley]
日期:2021-07-08
卷期号:14 (16): 3283-3292
被引量:12
标识
DOI:10.1002/cssc.202100837
摘要
Abstract Due to the adjustable structure and the broad application prospects in energy and other fields, the exploration of porous organic materials [metal‐organic polymers (MOPs), covalent organic frameworks (COFs), etc.] has attracted extensive attention. In this work, an imine‐induced metal‐organic and covalent organic coexisting framework (Co−MOP@COF) hybrid was designed based on the combination between the amino units from the organic ligands of Co−MOP and the aldehyde groups from COF. The obtained Co−MOP@COF hybrid with layer‐decorated microsphere morphology exhibited good electrochemical cycling performance (a large reversible capacity of 1020 mAh g −1 after 150 cycles at 100 mA g −1 and a reversible capacity of 396 mAh g −1 at 500 mA g −1 ) as the anode for Li‐ion batteries. The coexisting framework structure endowed the Co–MOP@COF hybrid with more surface area exposed in the exfoliated COF structure, which provided rapid Li‐ion diffusion, better electrolyte infiltration, and effective activation of functional groups. Therefore, the Co−MOP@COF hybrid material achieved an enhanced Li storage mechanism involving multi‐electron redox reactions, related to the Co II center and organic groups (C=C groups of benzene rings and C=N groups), and furthermore improved electrochemical performance.
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