In situ sol-gel synthesis of Ti2Nb10O29/C nanoparticles with enhanced pseudocapacitive contribution for a high-rate lithium-ion battery  

作　　者：Guang-Yin Liu Yi-Yang Zhao Yu-Feng Tang Xiao-Di Liu Miao Liu Peng-Jiang Wu 

机构地区：[1]College of Chemistry and Pharmaceutical Engineering,Nanyang Normal University,Nanyang 473061,China

出　　处：《Rare Metals》2020年第9期1063-1071,共9页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51802163);the National Natural Science Foundation of Henan Department of Education(No.20A480004);the China Postdoctoral Science Foundation(No.2017M622564)。

摘　　要：Ti2Nb10O29/C nanoparticles with a carbon content of 13 wt%and a mean size of 50 nm were fabricated through a convenient and effective in situ sol-gel process.The small grain size and carbon modification can improve the pseudocapacitive effect of the Ti2Nb10O29/C nanoparticles,leading to excellent rate capacity,especially at high current rate.Specifically,the discharge capacity of the Ti2Nb10O29/C electrode is 258.3,236.0,216.6,184.5 and161.5 mAh·g-1 at different current densities of 1C,5C,10C,20C and 30C.Nevertheless,the discharge capacity of the Ti2Nb10O29 electrode is 244.9 mAh·g-1 at 1C,which is rapidly reduced to 89.7 mAh·g-1 at 30C.In addition,the small size and carbon layer of the Ti2Nb10O29/C nanoparticles can supply abundant active sites for Li+storage as well as enhance the electronic conductivity and Li+diffusion,endowing these nanoparticles with a high discharge capacity and excellent cycle performance.

关 键 词：NANOPARTICLES Anode materials Sol-gel method Energy storage 

分 类 号：TM912[电气工程—电力电子与电力传动]