Ultrahigh rate capability and ultralong cycling stability of sodium-ion batteries enabled by wrinkled black titania nanosheets with abundant oxygen vacancies

Lianbo Ma, Xin Gao, Wenjun Zhang, Hao Yuan, Yi Hu, Guoyin Zhu, Renpeng Chen, Tao Chen, Zuoxiu Tie*, Jie Liu, Tom Wu, Zhong Jin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Sodium-ion batteries (SIBs) have been considered as one of the promising alternatives for lithium-ion batteries, owning to the abundant reserve and low cost of sodium-related salts. However, SIBs usually suffer from the sluggish kinetics of Na+ and the serious volume expansion of anode materials, which inevitably restrict the performance of SIBs. Herein, electroconductive wrinkled anatase-phase black titanium oxide nanosheets with rich oxygen vacancies (OVs-TiO2-x) was found to have an ultrafast Na+ insertion and extraction kinetics as anode material in SIBs. The wrinkled structure can significantly reduce the Na+ diffusion length, and the conductive networks formed by wrinkled OVs-TiO2-x can boost the electron transfer during Na+ insertion and extraction processes. With the rapid Na+ insertion/extraction ability, wrinkled OVs-TiO2-x delivers excellent sodium storage performance with high reversible capacity, ultra-high rate capability with the capacity reaches 91 mAh g−1 even at 20,000 mA g−1, and ultra-long cycling stability. These properties demonstrated the great potential of wrinkled OVs-TiO2-x to serve as a realistic choice of anode materials in SIBs.

Original languageEnglish (US)
Pages (from-to)91-96
Number of pages6
JournalNano Energy
Volume53
DOIs
StatePublished - Nov 2018

Keywords

  • Conductive networks
  • Cycling stability
  • Rate capability
  • Sodium-ion batteries
  • Wrinkled TiO nanosheets with oxygen vacancies

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • General Materials Science
  • Renewable Energy, Sustainability and the Environment

Fingerprint

Dive into the research topics of 'Ultrahigh rate capability and ultralong cycling stability of sodium-ion batteries enabled by wrinkled black titania nanosheets with abundant oxygen vacancies'. Together they form a unique fingerprint.

Cite this