Pseudocapacitive materials for electrochemical capacitors: From rational synthesis to capacitance optimization

Jie Wang, Shengyang Dong, Bing Ding, Ya Wang, Xiaodong Hao, Hui Dou, Yongyao Xia, Xiaogang Zhang

Research output: Contribution to journalReview articlepeer-review

Abstract

Among various energy-storage devices, electrochemical capacitors (ECs) are prominent power provision but show relatively low energy density. One way to increase the energy density of ECs is to move from carbon-based electric double-layer capacitors to pseudocapacitors, which manifest much higher capacitance. However, compared with carbon materials, the pseudocapacitive electrodes suffer from high resistance for electron and/or ion transfer, significantly restricting their capacity, rate capability and cyclability. Rational design of electrode materials offers opportunities to optimize their electrochemical performance, leading to devices with high energy density while maintaining high power density.This paper reviews the different approaches of electrodes striving to advance the energy and power density of ECs.

Original languageEnglish
Article numbernww072
Pages (from-to)71-90
Number of pages20
JournalNational Science Review
Volume4
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Keywords

  • Cycle stability
  • Electrochemical capacitors
  • Energy density
  • Power density
  • Pseudocapacitive electrode

ASJC Scopus subject areas

  • General

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