猴头菌
阳极
金属有机骨架
材料科学
化学工程
电化学
锂离子电池
纳米技术
电池(电)
电极
锂(药物)
化学
吸附
医学
工程类
内分泌学
物理化学
功率(物理)
有机化学
物理
原材料
量子力学
作者
Ting Li,Yihong Tong,Jiawei Li,Kongshuang Zhao,Xiaoxi Liu,Hongyuan Xu,Hui Xu,Keliang Wang,Huixin Jin
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2021-10-08
卷期号:4 (10): 11400-11407
被引量:16
标识
DOI:10.1021/acsaem.1c02208
摘要
Most of the pristine metal–organic frameworks (MOFs) used as anodes have challenges including the structural stability and conductivity of the electrode, and the electrochemical performance of the batteries can be tailored by the morphology of the MOF materials. In this work, a Hericium erinaceus-like copper-based MOF (HECM) with a hierarchical structure is in situ synthesized via a one-step hydrothermal method under the assistance of citric acid as the ligand. The introduced polyvinylpyrrolidone (PVP) as the structure tuner modifies the stacking arrangement of MOF nanosheets to obtain a Hericium erinaceus morphology. This hierarchical structure can effectively release stress and enhance the structural stability of the electrode during long cycling. Additionally, it can provide sufficient intense and short transportation paths for lithium ion diffusion to improve the conductivity of the electrode. Herein, by using this pristine HECM material as the anode, an initial discharge capacity of 1205.9 mA h g–1 is achieved at a current density of 100 mA g–1. The discharge capacity remains at 897 mA h g–1 after 150 cycles, which is 74.4% of the initial discharge capacity. Moreover, this MOF synthesis approach is simple, low-cost, and environmentally friendly. Thus, the green preparation method and excellent properties of the HECM would inspire the development high-performance MOFs for lithium ion batteries.
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