Enhanced electrochemical performance of Li-ion batteries with nanoporous titania as negative electrodes

作     者：Md.Arafat Rahman Xiaojian Wang Cuie Wen 

作者机构：Faculty of Science Engineering and Technology Swinburne University of Technology School of Aerospace Mechanical and Manufacturing Engineering RMIT University Bundoora 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2015年第24卷第2期

页      面：157-170页

核心收录：

学科分类：0820[工学-石油与天然气工程] 081702[工学-化学工艺] 0808[工学-电气工程] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 0703[理学-化学] 

基　　金：supported by the Australia-India Strategic Research Fund(AISRF ST060048) 

主　　题：nanoporous TiO_2 negative electrode capacity lithium-ion batteries 

摘      要：Nanoporous anatase TiO_2 （np-TiO_2） electrodes have been developed via the anodization of titanium foils in fluoride containing electrolytes, and its application in rechargeable lithium-ion batteries （LIBs） was investigated. Four different types of np-TiO_2 electrodes with different pore diameters of 14.7±8.2 nm, 12.85±6.8 nm, 11.0±5.5, and 26.7±13.6 nm were fabricated for evaluating the effect of nanoporous characteristics on the LIB performance. The discharge capacity of the four battery types 1, 2, 3, and 4 were 132.7 mAh·g^-1, 316.7 mAh·g^-1, 154.3 mAh·g^-1, and 228.4 mAh·g^-1, respectively. In addition, these electrodes 1, 2, 3, and 4 exhibited reversible capacity of 106.9 mAh·g^-1 after 295th, 180.9 mAh·g^-1 after 220th, 126.1 mAh·g^-1 after 150th, and 206.7 mAh·g^-1 after 85th cycle at a rate of 1 C, respectively. It was noted that the cyclic life of the batteries had an inverse relationship, and the capacity had a proportional relationship to the pore diameter. The enhanced electrochemical performance of the nanoporous electrodes can be attributed to the improved conductivity and the enhanced kinetics of lithium insertion/extraction at electrode/electrolyte interfaces because of the large specific surface area of np-TiO_2 electrodes.