期刊
NANOSCALE
卷 8, 期 21, 页码 10928-10937出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr09149g
关键词
-
类别
资金
- NNSF China [21171067, 21373100, 21301133]
- Jilin Provincial Talent Fund [802110000412]
- Tang Aoqing Professor Fund of Jilin University [450091105161]
- Department of Chemistry, University of Cambridge
- Department of Education of Hubei Province for Chutian Scholar program
- Hubei Natural Science Foundation [2014CFB160, 2015CFB428]
- SRF for ROCS [SEM [2015]311]
Engineering hierarchical structures of electrode materials is a powerful strategy for optimizing the electrochemical performance of an anode material for lithium-ion batteries (LIBs). Herein, we report the fabrication of hierarchical TiO2/C nanocomposite monoliths by mediated mineralization and carbonization using bacterial cellulose (BC) as a scaffolding template as well as a carbon source. TiO2/C has a robust scaffolding architecture, a mesopore-macropore network and TiO2-C heterostructure. TiO2/C-500, obtained by calcination at 500 degrees C in nitrogen, contains an anatase TiO2-C heterostructure with a specific surface area of 66.5 m(2) g(-1). When evaluated as an anode material at 0.5 C, TiO2/C-500 exhibits a high and reversible lithium storage capacity of 188 mA h g(-1), an excellent initial capacity of 283 mA h g(-1), a long cycle life with a 94% coulombic efficiency preserved after 200 cycles, and a very low charge transfer resistance. The superior electrochemical performance of TiO2/C-500 is attributed to the synergistic effect of high electrical conductivity, anatase TiO2-C heterostructure, mesopore-macropore network and robust scaffolding architecture. The current material strategy affords a general approach for the design of complex inorganic nanocomposites with structural stability, and tunable and interconnected hierarchical porosity that may lead to the next generation of electrochemical supercapacitors with high energy efficiency and superior power density.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据