文献类型：期刊文献

英文题名：Fabrication of porous lithium titanate self-supporting anode for high performance lithium-ion capacitor

作者：Liu, Yan[1];Wang, Wenqiang[1];Chen, Jin[1];Li, Xingwei[1];Cheng, Qilin[1];Wang, Gengchao[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2020

卷号：50

起止页码：344

外文期刊名：JOURNAL OF ENERGY CHEMISTRY

收录：;EI(收录号：20201608481113);WOS:【SCI-EXPANDED(收录号:WOS:000570592100010)】；

基金：This work was supported by the National Natural Science Foundation of China (51673064, 21875065), International Science & Technology Cooperation Program of China (2016YFE0131200), and Shanghai Municipality Research Project (15520720500).

语种：英文

外文关键词：Lithium titanate; Graphene foam; Ion transmission; Hybrid capacitor

摘要：Lithium titanate has unique "zero-strain" characteristics, which makes it promising for rapid energy storage lithium-ion capacitors. However, extremely low electronic conductivity and lithium ion diffusion coefficient severely limit its performance at high rate. Herein, we have constructed in situ clusters of porous lithium titanate nanoparticles on self-supporting carbon nanotube film by combining iron oxide hard template method and F127 soft template method. Due to the nano-structured particle size and the penetrating lithium ion transmission channel, a greatly improved lithium ion diffusion coefficient has been achieved, which brings significantly better electrochemical performance than dense lithium titanate. By assembling with a durable graphene foam cathode, a lithium-ion capacitor with an energy density of up to 101.8 Wh kg(-1) was realized (at a power density of 436.1 W kg(-1)). And its capacitance retention reaches 84.8% after 5000 cycles. With such an alluring result, our work presents a novel lithium-ion capacitor system with practical application prospects. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.