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- Title
Growth Mechanism and Electrochemical Properties of Porous Hollow Tin Dioxide Nanospheres.
- Authors
Yang, Youwen; Ma, Dongming; Cheng, Ting; Gao, Yuanhao; Li, Guanghai
- Abstract
Porous hollow 2 nanospheres were prepared by means of enforced 2+ hydrolysis method under hydrochloric acid medium. These hollow nanospheres with an average diameter of 220nm had a very thin shell thickness of about 40nm and were surrounded by elongated octahedral-like nanoparticles with the apex oriented outside. The experimental conditions, such as content, reaction temperature and time directly dominated the morphology, structure and crystallinity of the obtained samples. A pre-oxidation-nucleation-growth mechanism and inside-out Ostwald-ripening method was proposed on the basis of the previous research and time-dependent experiments. Electrochemical tests showed that the porous hollow 2 nanospheres exhibited improved cycling performance for anode materials of lithium-ion batteries, which retained a high reversible capacity of 540.0mAhg-1, and stable cyclic retention at 120th cycle. A porous hollow SnO2 nanostructure is obtained via an enforced hydrolysis method under hydrochloric acid medium. This porous hollow nanosphere has a relatively high Brunauer-Emmett-Teller (BET) specific surface area. It means that porous hollow structure can effectively buffer the drastic volume change during the charge-discharge cycle, leading to improved reversible capacity.
- Subjects
POROUS materials; STANNIC oxide; ELECTROCHEMICAL analysis; HYDROCHLORIC acid; HYDROLYSIS; CHEMICAL sample preparation
- Publication
NANO, 2015, Vol 10, Issue 6, p-1
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292015500873