Investigations on Zr incorporation into Li3V2(PO4)3/C cathode materials for lithium ion batteries. Issue 7 (31st January 2017)

• Record Type: Journal Article
• Authors: Sun, Hua-Bin; Zhou, Ying-Xian; Zhang, Lu-Lu; Yang, Xue-Lin; Cao, Xing-Zhong; Arave, Hanu; Fang, Hui; Liang, Gan
• Is Part Of: Physical chemistry chemical physics. Volume 19:Issue 7(2017)
• Page Start: 5155
• Page End: 5162
• Publication Date: 2017-01-31
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c6cp07760a
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : Zr-modified Li3 V2 (PO4 )3 /C composites (LVZrP/C and LVP/C-Zr) obtained from different ways exhibit enhanced performance, in which Zr exists not only in the LVP lattice but also on the LVP surface. Abstract : Li3 V2 (PO4 )3 /C (LVP/C) composites have been modified by different ways of Zr-incorporation via ultrasonic-assisted solid-state reaction. The difference in the effect on the physicochemical properties and the electrochemical performance of LVP between Zr-doping and ZrO2 -coating has also been investigated. Compared with pristine LVP/C, Zr-incorporated LVP/C composites exhibit better rate capability and cycling stability. In particular, the LVP/C-Zr electrode delivers the highest initial capacity of 150.4 mA h g −1 at 10C with a capacity retention ratio of 88.4% after 100 cycles. The enhanced electrochemical performance of Zr-incorporated LVP/C samples (LVZrP/C and LVP/C-Zr) is attributed to the increased ionic conductivity and electronic conductivity, the improved stability of the LVP structure, and the decreased charge-transfer resistance.