Premium
Unravelling the Correlation between the Aspect Ratio of Nanotubular Structures and Their Electrochemical Performance To Achieve High‐Rate and Long‐Life Lithium‐Ion Batteries
Author(s) -
Tang Yuxin,
Zhang Yanyan,
Deng Jiyang,
Qi Dianpeng,
Leow Wan Ru,
Wei Jiaqi,
Yin Shengyan,
Dong Zhili,
Yazami Rachid,
Chen Zhong,
Chen Xiaodong
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201406719
Subject(s) - electrochemistry , materials science , lithium (medication) , electrode , nanotechnology , nanostructure , aspect ratio (aeronautics) , battery (electricity) , ion , hydrothermal circulation , energy storage , lithium ion battery , chemical engineering , optoelectronics , chemistry , medicine , power (physics) , physics , organic chemistry , quantum mechanics , engineering , endocrinology
The fundamental understanding of the relationship between the nanostructure of an electrode and its electrochemical performance is crucial for achieving high‐performance lithium‐ion batteries (LIBs). In this work, the relationship between the nanotubular aspect ratio and electrochemical performance of LIBs is elucidated for the first time. The stirring hydrothermal method was used to control the aspect ratio of viscous titanate nanotubes, which were used to fabricate additive‐free TiO 2 ‐based electrode materials. We found that the battery performance at high charging/discharging rates is dramatically boosted when the aspect ratio is increased, due to the optimization of electronic/ionic transport properties within the electrode materials. The proof‐of‐concept LIBs comprising nanotubes with an aspect ratio of 265 can retain more than 86 % of their initial capacity over 6000 cycles at a high rate of 30 C. Such devices with supercapacitor‐like rate performance and battery‐like capacity herald a new paradigm for energy storage systems.