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Author:

Zhang, Rui (Zhang, Rui.) | Sun, Xiaofei (Sun, Xiaofei.) | Xu, Youlong (Xu, Youlong.) | Teng, Feng (Teng, Feng.) | Sun, Gongyu (Sun, Gongyu.) | Chen, Yanjun (Chen, Yanjun.) | Chen, Guogang (Chen, Guogang.)

Indexed by:

SCIE EI Scopus

Abstract:

The multi-cations doped LiVPO4F, nominally Li0.97Cr0.01V0.95Al0.01Nb0.02PO4F0.97, is prepared by Chromium (Cr) doping on lithium site and Al-Nb co-doping on vanadium site via a conventional carbothermal reduction (CTR) route. The crystallographic lattice volume, particle size and morphology are not obviously changed comparing with un-doped LiVPO4F. However, the high rate and lifetime cycling performances are noticeably improved although the capacities at very low currents are slightly decreased. The reversible capacity at 1/10 C, 1 C, 2 C and 4 C of the pristine LiVPO4F is 143 mA h g(-1), 99 mA h g(-1), 86 mA h g(-1) and 70 mA h g(-1), respectively, while that of the doped counterpart is 138 mA h g(-1), 102 mA h g(-1), 95 mA h g(-1) and 82 mA h g(-1), respectively. The capacity retention after 100 galvanostatic cycles at 1.5 C is enhanced from 85.4% to 90.9% by such multi-cations doping. Moreover, the initial coulombic efficiency is significantly increased from 81.8% to 90.3% as well.

Keyword:

aluminum chromium doping energy storage and conversion Lithium vanadium fluorophosphate niobium

Author Community:

  • [ 1 ] [Sun, Xiaofei] Xi An Jiao Tong Univ, Minist Educ, Elect Mat Res Lab, Key Lab, Xian 710049, Peoples R China
  • [ 2 ] [Sun, Xiaofei] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Peoples R China
  • [ 3 ] [Sun, Xiaofei]Xi An Jiao Tong Univ, Minist Educ, Elect Mat Res Lab, Key Lab, Xian 710049, Peoples R China
  • [ 4 ] [Sun, Xiaofei]Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Peoples R China

Reprint Author's Address:

  • Xi An Jiao Tong Univ, Minist Educ, Elect Mat Res Lab, Key Lab, 28 West Xianning Rd, Xian 710049, Peoples R China.

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Source :

FUNCTIONAL MATERIALS LETTERS

ISSN: 1793-6047

Year: 2015

Issue: 5

Volume: 8

1 . 3 3 3

JCR@2015

2 . 1 7 0

JCR@2020

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:265

JCR Journal Grade:2

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 3

SCOPUS Cited Count: 4

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 6

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