期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 11, 页码 9747-9755出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b00232
关键词
SnO2; codoping; hierarchical structure; synergetic effect; lithium ion batteries (LIBs)
资金
- National Natural Science Foundation of China [50902044, 51672069, 51472268]
- 863 Program of China [2015AA034201]
- Program for Science and Technology Innovation Talents in Universities of Henan Province [16HASTIT042]
- International Cooperation Project of Science and Technology Department of Henan Province [162102410014]
- State Key Laboratory of Organic Inorganic Composites [oic-201701011]
A facile one-pot hydrothermal strategy is applied to prepare Co and F codoped SnO2 (Co-F/SnO2) nanoparticles, which exhibit a unique rice-shaped self-similar structure. Compared with the pristine and Co-doped counterparts (SnO2 and Co/SnO2), the Co-F/SnO2 electrode demonstrates higher capacity, better cyclability, and rate capability as anode material for lithium ion batteries (LIBs). A high charge capacity of 800 mAh g(-1) can be successfully delivered after 50 cycles at 0.1 degrees C, and a high reversible capacity of 700 mAh could be retained after 100 cycles at 5 C. The excellent lithium storage performances of the Co-F/SnO2 nanoparticles could be attributed to the synergetic effects of the doped Co and F, as well as the unique hierarchical self-similar structure with moderate-oxygen defect and inactive pillars, which not only facilitates the fast diffusion of Li ions, but also stabilizes the structure during the electrochemical cycling.
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