Advanced LiTi2(PO4)(3)/C anode by incorporation of carbon nanotubes for aqueous lithium-ion batteries

作者：He, Zhangxing; Jiang, Yifan; Sun, Dan; Dai, Lei^*; Wang, Haiyan^*

来源：Ionics, 2017, 23(3): 575-583.

DOI：10.1007/s11581-016-1828-5

• Aqueous lithium-ion batteries
• Anode
• LiTi2(PO4)(3)
• Carbon nanotubes
• Electrochemical performance

Inferior rate capability is a big challenge for LiTi2(PO4)(3) anode for aqueous lithium-ion batteries. Herein, to address such issue, we synthesized a high-performance LiTi2(PO4)(3)/carbon/carbon nanotube (LTP/C/CNT) composite by virtue of high-quality carbon coating and incorporation of good conductive network. The as-prepared LTP/C/CNT composite exhibits excellent rate performance with discharge capacity of 80.1 and 59.1 mAh g(-1) at 10 C and 20 C (based on the mass of anode, 1 C = 150 mA g(-1)), much larger than that of the LTP/C composite (53.4 mAh g(-1) at 10 C, and 31.7 mAh g(-1) at 20 C). LTP/C/CNT also demonstrates outstanding cycling stability with capacity retention of 83.3 % after 1000 cycles at 5 C, superior to LTP/C without incorporation of CNTs (60.1 %). As verified, the excellent electrochemical performance of the LTP/C/CNT composite is attributed to the enhanced electrical conductivity, rapid charge transfer, and Li-ion diffusion because of the incorporation of CNTs.

• 出版日期2017-3
• 单位中南大学; 中国科学技术大学