Modified sol-gel synthesis of nanosized LiVPO4F/C cathode material with mechanical blending assist

作者：Xiong, Zhongqiong; Zhang, Guoqing^*; Xiong, Junqiao; Yang, Xiaoqing; Zhang, Yunyun

来源：Materials Letters, 2013, 111: 214-216.

DOI：10.1016/j.matlet.2013.08.086

• Lithium-ion batteries
• Cathode material
• Lithium vanadium fluorophosphates
• Nanocomposite
• Sol-gel preparation

Nanosized LiVPO4F/C cathode material is synthesized by heating the precursor obtained through a sol-gel method with mechanical blending assist. XRD and SEM results indicate that LiVPO4F/C composite is pure phase, possesses good crystallinity and uniform particle size distribution. The average size of LiVPO4F/C is about 40 nm. In the range of 3.0-4.6 V. the LiVPO4F/C electrode presents excellent cyclic performance. At 0.1 C rate, it delivers initial discharge capacity of about 138.3 mAh g(-1) and maintains 135.7 mAh g(-1) after 50 cycles. Even carried out at 55 degrees C, this composite displays discharge capacities of 1193 mAh g(-1) at the rate of 0.5 C and 104.1 mAh g(-1) at the rate of 1 C, and maintains about 115.5 and 97.4 mAh g(-1) after 30 cycles, respectively.

• 出版日期2013-11-15
• 单位广东工业大学