Abstract
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.
Original language | English |
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Pages (from-to) | 22-29 |
Number of pages | 8 |
Journal | Journal of Power Sources |
Volume | 429 |
DOIs | |
Publication status | Published - 31 Jul 2019 |
Keywords
- Cathode
- Conductive MOF
- High rate performance
- Redox center
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering