Citation: Liang Deng, Wen-Hui Yang, Shao-Xiong Zhou, Ji-Tao Chen. Effect of carbon nanotubes addition on electrochemical performance and thermal stability of Li₄Ti₅O₁₂ anode in commercial LiMn₂O₄/Li₄Ti₅O₁₂ full-cell[J]. Chinese Chemical Letters, ;2015, 26(12): 1529-1534. doi: 10.1016/j.cclet.2015.06.009 shu

Effect of carbon nanotubes addition on electrochemical performance and thermal stability of Li₄Ti₅O₁₂ anode in commercial LiMn₂O₄/Li₄Ti₅O₁₂ full-cell

1.
a Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
b China Iron & Steel Research Institute Group, Advanced Technology & Materials Co.
b China Iron & Steel Research Institute Group, Advanced Technology & Materials Co., Ltd., Beijing 100081, China;
3.
c Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

Corresponding author: Liang Deng,
Received Date: 7 April 2015
Available Online: 29 May 2015

Li₄Ti₅O₁₂ (LTO)/carbon nanotubes (CNTs) composite material is synthesized based on a solid-state method by sand-milling, spray-drying and calcining at 850 ℃ under N₂ flow. The LTO/CNTs samples with 1 wt% and 3 wt% weight ratio of CNTs addition and the pristine LTO sample are prepared. The rate performance and the thermal stability of these samples are investigated based on LiMn₂O₄ (LMO)/LTO full-cell. The results show that theweight ratio of CNTs addition has distinct effect on LTO performances. The composite materials of LTO composited CNTs have better performance at high-rate due to the intercalation enhancement by conductive network of CNTs. At second, the overcharging temperature response of the cell's surface with 1 wt% CNTs addition is the lowest. The particle size distribution is measured and the most uniform particles are obtained with 1 wt% CNTs addition. This trend could explain that the mediumquantity of CNTs is optimal to improve the heat and mass transfer and prevent the problems of crystallite growing interference and aggregation during the calcination process.
- Lithium titanate
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通讯作者: 陈斌, bchen63@163.com

Effect of carbon nanotubes addition on electrochemical performance and thermal stability of Li₄Ti₅O₁₂ anode in commercial LiMn₂O₄/Li₄Ti₅O₁₂ full-cell