Highly Conductive Two-Dimensional Metal-Organic Frameworks for Resilient Lithium Storage with Superb Rate Capability

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Zhenzhen Wu
  • David Adekoya
  • Xing Huang
  • Milton J. Kiefel
  • Jian Xie
  • Wei Xu
  • Daoben Zhu
  • Shanqing Zhang

Detail(s)

Original languageEnglish
Pages (from-to)12016-12026
Journal / PublicationACS Nano
Volume14
Issue number9
Online published24 Aug 2020
Publication statusPublished - 22 Sep 2020

Abstract

Redox-active organic cathode materials have drawn growing attention because of the broad availability of raw materials, eco-friendliness, scalable production, and diverse structural flexibility. However, organic materials commonly suffer from fragile stability in organic solvents, poor electrochemical stability in charge/discharge processes, and insufficient electrical conductivity. To address these issues, using Cu(II) salt and benzenehexathiolate (BHT) as the precursors, we synthesized a robust and redox-active 2D metal-organic framework (MOF), [Cu3(C6S6)]n, namely, Cu-BHT. The Cu-BHT MOFs have a highly conjugated structure, affording a high electronic conductivity of 231 S cm-1, which could further be increased upon lithiation in lithium-ion battery (LIB) applications. A reversible four-electron reaction reveals the Li storage mechanism of the Cu-BHT for a theoretical capacity of 236 mAh g-1. The as-prepared Cu-BHT cathode delivers an excellent reversible capacity of 175 mAh g-1 with ultralow capacity deterioration (0.048% per cycle) upon 500 cycles at a high current density of 300 mA g-1. Therefore, we believe this work would provide a practical strategy for the development of high-power energy storage materials.

Research Area(s)

  • benzenehexathiolate, cathode, conductive 2D metal−organic frameworks (MOFs), Cu-BHT, high-rate, LIBs

Citation Format(s)

Highly Conductive Two-Dimensional Metal-Organic Frameworks for Resilient Lithium Storage with Superb Rate Capability. / Wu, Zhenzhen; Adekoya, David; Huang, Xing; Kiefel, Milton J.; Xie, Jian; Xu, Wei; Zhang, Qichun; Zhu, Daoben; Zhang, Shanqing.

In: ACS Nano, Vol. 14, No. 9, 22.09.2020, p. 12016-12026.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review