Conductive metal–organic framework with redox metal center as cathode for high rate performance lithium ion battery

Shaonan Gu, Zhaowen Bai, Soumyadip Majumder, Baoling Huang, Guohua Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

50 Citations (Scopus)

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 languageEnglish
Pages (from-to)22-29
Number of pages8
JournalJournal of Power Sources
Volume429
DOIs
Publication statusPublished - 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

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