Graphene Quantum Dots Coated VO2 Arrays for Highly Durable Electrodes for Li and Na Ion Batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Dongliang Chao
  • Changrong Zhu
  • Xinhui Xia
  • Jilei Liu
  • Xiao Zhang
  • Jin Wang
  • Pei Liang
  • Jianyi Lin
  • Ze Xiang Shen
  • Hong Jin Fan

Detail(s)

Original languageEnglish
Pages (from-to)565-573
Journal / PublicationNano Letters
Volume15
Issue number1
Online published22 Dec 2014
Publication statusPublished - 14 Jan 2015
Externally publishedYes

Abstract

Nanoscale surface engineering is playing important role in enhancing the performance of battery electrode. VO2 is one of high-capacity but less-stable materials and has been used mostly in the form of powders for Li-ion battery cathode with mediocre performance. In this work, we design a new type of binder-free cathode by bottom-up growth of biface VO2 arrays directly on a graphene network for both high-performance Li-ion and Na-ion battery cathodes. More importantly, graphene quantum dots (GQDs) are coated onto the VO2 surfaces as a highly efficient surface "sensitizer" and protection to further boost the electrochemical properties. The integrated electrodes deliver a Na storage capacity of 306 mAh/g at 100 mA/g, and a capacity of more than 110 mAh/g after 1500 cycles at 18 A/g. Our result on Na-ion battery may pave the way to next generation postlithium batteries.

Research Area(s)

  • graphene quantum dots, lithium ion battery, nanoarray electrodes, sodium ion battery, Vanadium oxides

Citation Format(s)

Graphene Quantum Dots Coated VO2 Arrays for Highly Durable Electrodes for Li and Na Ion Batteries. / Chao, Dongliang; Zhu, Changrong; Xia, Xinhui; Liu, Jilei; Zhang, Xiao; Wang, Jin; Liang, Pei; Lin, Jianyi; Zhang, Hua; Shen, Ze Xiang; Fan, Hong Jin.

In: Nano Letters, Vol. 15, No. 1, 14.01.2015, p. 565-573.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal