Effect of Fe-doping followed by C+SiO2 hybrid layer coating on Li3V2(PO4)3 cathode material for lithium-ion batteries. Issue 15 (15th November 2016)

• Record Type: Journal Article
• Authors: Sun, Hua-Bin; Zhang, Lu-Lu; Yang, Xue-Lin; Huang, Yun-Hui; Li, Zhen; Zhou, Ying-Xian; Ding, Xiao-Kai; Liang, Gan
• Is Part Of: Ceramics international. Volume 42:Issue 15(2016)
• Page Start: 16557
• Page End: 16562
• Publication Date: 2016-11-15
• Subjects: Lithium ion battery -- Lithium vanadium phosphate -- Fe-doping -- Hybrid layer coating; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.07.075
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: A novel Li3 V2 (PO4 )3 composite modified with Fe-doping followed by C+SiO2 hybrid layer coating (LVFP/C-Si) is successfully synthesized via an ultrasonic-assisted solid-state method, and characterized by XRD, XPS, TEM, galvanostatic charge/discharge measurements, CV and EIS. This LVFP/C-Si electrode shows a significantly improved electrochemical performance. It presents an initial discharge capacity as high as 170.8 mA h g −1 at 1 C, and even delivers an excellent initial capacity of 153.6 mA h g −1 with capacity retention of 82.3% after 100 cycles at 5 C. The results demonstrate that this novel modification with doping followed by hybrid layer coating is an ideal design to obtain both high capacity and long cycle performance for Li3 V2 (PO4 )3 and other polyanion cathode materials in lithium ion batteries.