Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8012547 | Materials Letters | 2018 | 12 Pages |
Abstract
V3+ and Fâ co-doped LiFePO4/C cathode materials are prepared via a facile wet milling-spray drying-carbothermal reduction (WSC) process. The obtained products have bowl-like morphologies with the diameters from 5 to 10â¯Î¼m, which are composed of numerous nanoparticles smaller than 100â¯nm integrated by carbon network. The effects of ion doping are studied. V3+ and Fâ co-doped LiFePO4/C shows improved electrochemical performance, which delivers a discharge capacity of 136â¯mAh·gâ1 (10 C) at 20â¯Â°C. At 0â¯Â°C, a capacity of 86â¯mAh·gâ1 (10â¯C) can be obtained, which is 20â¯mAh·gâ1 higher than LiFePO4/C. In addition, the V3+ and Fâ co-doped LiFePO4/C shows excellent cycle performances. The improved performance of V3+ and Fâ co-doped LiFePO4/C is due to the low charge transfer resistance, enhanced electrical conductivity and the holes on the surface of particles which can provide more ion transport channel.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Yi-ju Lv, Bin Huang, Jia-xu Tan, Shi-quan Jiang, Shu-fen Zhang, Yan-xuan Wen,