Design of Ti4+-doped Li3V2(PO4)3/C fibers for lithium energy storage. Issue 6 (15th March 2022)

• Record Type: Journal Article
• Authors: Huang, Zan; Luo, Peifang; Zheng, Honghong
• Is Part Of: Ceramics international. Volume 48:Issue 6(2022)
• Page Start: 8325
• Page End: 8330
• Publication Date: 2022-03-15
• Subjects: Li3V2(PO4)3/C cathode -- Nanofibers -- Ti4+ doping -- Lithium energy storage -- High-rate capability; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.12.037
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, we propose a facile approach to fabricate Ti 4+ -doped Li3 V2 (PO4 )3 /C (abbreviated as C-LVTP) nanofibers using an electrospinning route followed by a high temperature treatment. In this designed nanocomposite, the ultrafine LVTP dots are homogeneously dispersed into one-dimensional carbon nanofibers and the Ti 4+ doping does not destroy the crystal structure of monoclinic Li3 V2 (PO4 )3 . Compared to the undoped Li3 V2 (PO4 )3 /C (abbreviated as C-LVP), the as-fabricated C-LVTP fibers present higher reversible capacity, superior high-rate capability as well as better cyclic property. Especially, the C-LVT7% P cathode delivers not only high capacities of 187.2 and 160.3 mAh g −1 at 0.5 and 10 C respectively, but also stable cyclic property with the reversible capacity of 135.8 mAh g −1 at 20 C following 500-cycle spans. The good battery characteristics of C-LVT7% P can be mainly ascribed to Ti 4+ doping, which can increase the electrical conductivity and Li + diffusion coefficient.