Synergy of Ion Doping and Spiral Array Architecture on Ti2Nb10O29 : A New Way to Achieve High-Power Electrodes

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

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Author(s)

  • Shengjue Deng
  • He Zhu
  • Bo Liu
  • Liang Yang
  • Xiuli Wang
  • Shenghui Shen
  • Yan Zhang
  • Jiaao Wang
  • Changzhi Ai
  • Shiwei Lin
  • Yangfan Lu
  • Guoxiang Pan
  • Jianbo Wu
  • Xinhui Xia
  • Jiangping Tu

Detail(s)

Original languageEnglish
Article number2002665
Journal / PublicationAdvanced Functional Materials
Volume30
Issue number25
Online published29 Apr 2020
Publication statusPublished - Jun 2020

Abstract

Ameliorating electronic/ionic transport and structural stability of electrode materials is important to the development of power-intensive lithium ion batteries. Despite its great potential as a high-power anode, titanium niobium oxide (Ti2Nb10O29, TNO) still underperforms due to its unsatisfactory electronic/ionic conductivity. In this work, a powerful synergistic strategy by combining ion doping and spiral array architecture to boost high-rate performance of TNO is reported. Cr3+ doped TNO nanoparticles (Cr-TNO) of 5–10 nm intimately grow on a conductive vertical graphene@TiC-C (VGTC) skeleton, forming novel Cr-TNO@VGTC spiral arrays. The unique spiral growth of TNO is achieved due to the confinement effect of VGTC skeleton. Meanwhile, a more open TNO crystal structure with faster ion transfer paths and enhanced structural stability is realized by Cr3+ doping, demonstrated via density functional theory calculation and in situ synchrotron X-ray diffraction technique. Benefiting from the superior conductive network, enhanced intrinsic electronic/ionic conductivity of Cr-TNO and reinforced structural stability, the Cr-TNO@VTC arrays show prominent high-power performance with a large capacity of 220 mAh g−1 at 40 C (power density of ≈11 kW kg−1) and superior durability (91% retention after 500 cycles). This work provides a new path for the construction of widespread high-power electrodes for fast energy storage.

Research Area(s)

  • anodes, chromium ion doping, lithium ion batteries, spiral arrays, Ti2Nb10O29

Citation Format(s)

Synergy of Ion Doping and Spiral Array Architecture on Ti2Nb10O29 : A New Way to Achieve High-Power Electrodes. / Deng, Shengjue; Zhu, He; Liu, Bo; Yang, Liang; Wang, Xiuli; Shen, Shenghui; Zhang, Yan; Wang, Jiaao; Ai, Changzhi; Ren, Yang; Liu, Qi; Lin, Shiwei; Lu, Yangfan; Pan, Guoxiang; Wu, Jianbo; Xia, Xinhui; Tu, Jiangping.

In: Advanced Functional Materials, Vol. 30, No. 25, 2002665, 06.2020.

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