A high-power lithium-ion hybrid electrochemical capacitor based on citrate-derived electrodes

Xiaoliang Yu, Jiaojiao Deng, Changzhen Zhan, Ruitao Lv, Zheng Hong Huang, Feiyu Kang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

34 Citations (Scopus)

Abstract

Achieving high-power lithium-ion hybrid electrochemical capacitor (Li-HEC) through facile and low-cost synthesis procedures is still quite challenging. In this work, starting from daily used food additives, nitrogen-doped hierarchical porous carbon (N-HPC) was prepared through facile pyrolysis of magnesium citrate and subsequent NH3 treatment, and carbon-coated Fe2O3 (Fe2O3@C) was synthesized by thermal decomposition of ferric citrate and following heat treatment in air, respectively. As-prepared N-HPC and Fe2O3@C were separately employed as cathode and anode materials to fabricate a high-power, which delivers a high energy density of 65 W h kg−1 at 368 W kg−1, and 31 W h kg−1 at a high power density of 9.2 kW kg−1. And it remains 84.1% capacity over 1000 galvanostatic charge-discharge cycles at 1 A g−1.

Original languageEnglish
Pages (from-to)76-81
Number of pages6
JournalElectrochimica Acta
Volume228
DOIs
Publication statusPublished - 20 Feb 2017
Externally publishedYes

Keywords

  • Citrates
  • Cycling stability
  • Heat treatment
  • High power
  • Hybrid capacitor

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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