Conductive polypyrrole-promoted Li3V2(PO4)3 nanocomposite for rechargeable lithium energy storage. (August 2022)

• Record Type: Journal Article
• Authors: Yan, Haiyan; Li, Minhao; Fu, Yuqiao; Chen, Shujuan; Wang, Yi; Zhang, Bo
• Is Part Of: Journal of physics and chemistry of solids. Volume 167(2022)
• Publication Date: 2022-08
• Subjects: Lithium energy storage -- Li3V2(PO4)3 -- Conductive polypyrrole -- Cathode -- High-rate performance; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2022.110787
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: Herein, we propose a facile method to fabricate conductive polypyrrole-enhanced Li3 V2 (PO4 )3 (LVPO@PPy) composite via a sol-gel way assisted with a self-assembly procedure. The morphology, microstructure, phase structure and battery property for the resulted LVPO@PPy nanocomposite have been systematically investigated. The results demonstrate that the monoclinic structured Li3 V2 (PO4 )3 (LVPO) particles are coated by a thin conductive polypyrrole. Electrochemical measurements indicate that the fabricated LVPO@PPy cathode possesses superior lithium storage performance than the pure LVPO. It can display the high capacities of 129.2 and 108.9 mAh/g at 0.2 and 10 C accordingly and exhibit a 97.5% capacity retention over 800 cycles at 20 C. Such an excellent batteries properties are ascribed to the synergistic effects of nanosized LVPO particles and conductive polypyrrole film, which can decrease the diffusion path for Li + and promote the conductivity. Highlights: Conductive polypyrrole-decorated Li3 V2 (PO4 )3 composite has been firstly designed and fabricated through a facile approach. Polypyrrole coating can greatly promote the electrical conductivity of Li3 V2 (PO4 )3 . The resulted nanocomposite presents outstanding lithium storage performance.