Localized Electrons Enhanced Ion Transport for Ultrafast Electrochemical Energy Storage

Jiewei Chen, Bi Luo, Qiushui Chen, Fei Li, Yanjiao Guo, Tom Wu, Peng Peng, Xian Qin, Gaoxiang Wu, Mengqi Cui, Lehao Liu, Lihua Chu, Bing Jiang, Yingfeng Li, Xueqing Gong, Yang Chai, Yongping Yang, Yonghua Chen, Wei Huang, Xiaogang LiuMeicheng Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

The rate-determining process for electrochemical energy storage is largely determined by ion transport occurring in the electrode materials. Apart from decreasing the distance of ion diffusion, the enhancement of ionic mobility is crucial for ion transport. Here, a localized electron enhanced ion transport mechanism to promote ion mobility for ultrafast energy storage is proposed. Theoretical calculations and analysis reveal that highly localized electrons can be induced by intrinsic defects, and the migration barrier of ions can be obviously reduced. Consistently, experiment results reveal that this mechanism leads to an enhancement of Li/Na ion diffusivity by two orders of magnitude. At high mass loading of 10 mg cm−2 and high rate of 10C, a reversible energy storage capacity up to 190 mAh g−1 is achieved, which is ten times greater than achievable by commercial crystals with comparable dimensions.

Original languageEnglish
Article number1905578
JournalAdvanced Materials
Volume32
Issue number14
DOIs
Publication statusPublished - 9 Apr 2020

Keywords

  • electrochemical energy storage
  • high loading mass
  • ion transport
  • lithium-ion batteries
  • sodium-ion batteries

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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