期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 9, 页码 4359-4367出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta08611j
关键词
-
资金
- National Key Basic Research Program of China [2014CB932400]
- National Natural Science Foundation of China [51232005]
- Shenzhen Basic Research Project [ZDSYS20140509172959981, JCYJ20140417115840246]
- Graduate School at Shenzhen, Tsinghua University [QN20150002]
- Peng Cheng Scholar program
- Production-study-research cooperation project of Guangdong province [2014B090901021]
- Dongguan City [2015509119213]
Titanium oxide (TiO2) has attracted great interest as a promising anode material for lithium (Li) ion batteries (LIBs) and sodium (Na) ion batteries (SIBs). However, the key factors that dictate the Li-ion and Na-ion storage and transportation in TiO2 remain unclear. Herein, we report a facile hydrolysis route to crafting a variety of high tap-density TiO2 spheres with controllable size and hierarchical pores. The Li-ion and Na-ion storage properties based on these TiO2 spheres were systematically investigated. The pore distribution and the size of TiO2 spheres were found to exert profound influence on the Li-ion and Na-ion storage and transportation. The Li-ion storage and transportation in dense TiO2 spheres was dependent mainly upon the micropore distribution and volume and independent of the size of spheres. In contrast, the excellent Na-ion storage and transportation in TiO2 spheres was enabled by the loose structure with a large macroscopic pore volume and shortened Na-ion diffusion length. High tap-density TiO2 spheres (1.06 g cm(-3)) with superior Li-ion and Na-ion storage properties were produced, exhibiting a Li-ion storage specific capacity of 189 mA h g(-1) at 1C and a high capacity retention of 88.1% after 100 cycles, and a Na-ion storage specific capacity of 184 mA h g(-1) at 1C and capacity retention of 90.5% after 200 cycles. The ability to understand the critical factors controlling the Li-ion and Na-ion storage in high tap-density TiO2 spheres enables their implementation for practical applications in Li-ion and Na-ion batteries.
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