4.6 Article

Mesoporous carbon derived from ZIF-8 for improving electrochemical performances of commercial LiFePO4

期刊

MATERIALS LETTERS
卷 197, 期 -, 页码 209-212

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2017.02.093

关键词

LiFePO4; Zeolitic imidazolate frameworks-8; Mesoporous carbon; High conductivity

资金

  1. Foundation on the Creative Research Team Construction Promotion Project of Beijing Municipal Institutions
  2. Science and technology foundation [ykj-2016-00161]
  3. International Research Promotion Program (IRPR) of Osaka University

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In order to improve high rate and cycle performances of commercial LiFePO4 (LFP), mesoporous carbon (MC) is synthesized by carbonization of zeolitic imidazolate frameworks-8 (ZIF-8). As an additive, MC can improve both electronic conductivity and lithium ion diffusion coefficient of LFP due to its high conductivity and mesoporous structure. LFP mixing with MC delivers a high rate performance of 154.6 mAh g(-1) at a current rate of 0.5 C and a capacity retention ratio of approximately 99.9% after 60 cycles at 10.0 C. Moreover, the discharge energy density is also improved due to the enhancement of discharge voltage platform. (C) 2017 Elsevier B.V. All rights reserved.

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