Synthesis and electrochemical performance of Li1+xTi2−xFex(PO4)3/C anode for aqueous lithium ion battery

• Published in: Advanced powder technology : the international journal of the Society of Powder Technology, Japan Japan, 2020-04, Vol.31 (4), p.1359-1364
• Main Authors: Meng, Weiwen, Li, Cong, Yao, Meng, He, Zhangxing, Wu, Xianwen, Jiang, Zhen, Dai, Lei, Wang, Ling
• Format: Article
• Language: English
• Subjects: Anode; Aqueous lithium ion batteries; Electrochemical performance; Fe doping; LiTi2(PO4)3
• ISSN: 0921-8831; 1568-5527
• DOI: 10.1016/j.apt.2020.01.015

[Display omitted] •A series of Li1+xTi2−xFex(PO4)3/C (x = 0, 0.05, 0.10, 0.30) composites were synthesized via sol-gel method.•The performance of LiTi2(PO4)3/C as anode for ALIBs was dramatically enhanced by Fe doping on Ti sites.•Fe doped LiTi2(PO4)3/C (Li1.1Ti1.9Fe0.1(PO4)3/C) composite demonstrates superior rate performance and excellent cycling stability. Aqueous lithium ion batteries (ALIBs) exhibit great application prospects in energy storage system, and the anode materials is the key to the extensive development of ALIBs. In this study, Li1+xTi2−xFex(PO4)3/C (x = 0, 0.05, 0.10, 0.30) composites as anode for ALIBs were synthesized via sol-gel method. The effect of Fe doping on LiTi2(PO4)3/C properties was assessed by electrochemical measurements. In all of these composites, Li1.1Ti1.9Fe0.1(PO4)3/C (LCF-10) presents the best electrochemical properties. LCF-10 exhibits discharge capacity with 120.0 and 80.2 mAh g−1 at 0.5 and 15C, severally, increasing by 1.2 and 1.3 times compared with the original LiTi2(PO4)3/C. Besides, LCF-10 demonstrates remarkable cycling performance, whose discharge capacity retention can keep 70.2% at 5 C for 1000 cycles. Our study demonstrates that Fe doping for LiTi2(PO4)3 lattice can efficiently enhance electrochemical properties of LiTi2(PO4)3/C composite.