阴极
电化学
氧化还原
电池(电)
化学
导电体
锂(药物)
离子
磷酸钒锂电池
价(化学)
锂离子电池
铜
无机化学
材料科学
电极
化学工程
复合材料
物理化学
热力学
有机化学
功率(物理)
内分泌学
工程类
物理
医学
作者
Shaonan Gu,Zhaowen Bai,Soumyadip Majumder,Baoling Huang,Guohua Chen
标识
DOI:10.1016/j.jpowsour.2019.04.087
摘要
Exploration of new materials for lithium ion battery is a continuous challenge to meet the increasing demand for energy storage. Herein, a novel conductive metal-organic framework Cu3(2,3,6,7,10,11-hexahydroxytriphenylene)2 (Cu3(HHTP)2) is obtained and tested as cathode active material in lithium ion battery. With a working voltage range of 1.7–3.5 V, Cu3(HHTP)2 cathode shows a reversible discharge and charge capacity of ∼95 mA h g−1, which is almost equal to its theoretical value. Impressively, this novel cathode also shows highly stable redox cycling performance at the current rate as high as 20C because of its intrinsic electrical conductivity and two dimensional porous structure. Electrochemical properties and chemical analysis of Cu3(HHTP)2 reveal that the valence change of copper cations in the framework is responsible for the lithium ions insertion/desertion during redox cycles. The first principle calculation also supports this mechanism.
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