Unravelling the Correlation between the Aspect Ratio of Nanotubular Structures and Their Electrochemical Performance To Achieve High-Rate and Long-Life Lithium-Ion Batteries

被引：169

作者：

Tang, Yuxin ^{[1
]}

Zhang, Yanyan ^{[1
]}

Deng, Jiyang ^{[1
]}

Qi, Dianpeng ^{[1
]}

Leow, Wan Ru ^{[1
]}

Wei, Jiaqi ^{[1
]}

Yin, Shengyan ^{[1
]}

Dong, Zhili ^{[1
]}

Yazami, Rachid ^{[1
]}

Chen, Zhong ^{[1
]}

Chen, Xiaodong ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2014年 / 53卷 / 49期

基金：

新加坡国家研究基金会;

关键词：

aspect ratio; lithium-ion batteries; nanotubes; TiO2; HIGH-SURFACE-AREA; ENERGY-STORAGE; HIGH-CAPACITY; TIO2; ANATASE; HYBRID NANOSTRUCTURES; ELECTRODE PERFORMANCE; HOLLOW MICROSPHERES; ULTRAFAST-CHARGE; RATE CAPABILITY; ANODE MATERIAL;

D O I：

10.1002/anie.201406719

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 TiO2-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.

引用

页码：13488 / 13492

页数：5