期刊
ACS NANO
卷 10, 期 1, 页码 377-386出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b05041
关键词
nickel oxide; metal organic framework; hierarchical structure; lithium ion battery; sodium ion battery
类别
资金
- University of Akron
- National Science Foundation (NSF) [NSF-CBET 1505943, 1336057]
- DOE STTR through pH Matter LLC. [DE-SC0013831]
- American Chemical Society [53560 -DNI 10]
- Div Of Chem, Bioeng, Env, & Transp Sys [1336057] Funding Source: National Science Foundation
Ni-based metal organic frameworks (Ni-MOFs) with unique hierarchical hollow ball-in-ball nanostructure were synthesized by solvothermal reactions. After successive carbonization and oxidation treatments, hierarchical NiO/Ni nanocrystals covered with a graphene shell were obtained with the hollow ball-in-ball nanostructure intact. The resulting materials exhibited superior performance as the anode in lithium ion batteries (LIBs): they provide high reversible specific capacity (1144 mAh/g), excellent cyclability (nearly no capacity loss after 1000 cycles) and rate performance (805 mAh/g at 15 A/g). In addition, the hierarchical NiO/Ni/Graphene composites demonstrated promising performance as anode materials for sodium-ion batteries (SIBs). Such a superior lithium and sodium storage performance is derived from the well-designed hierarchical hollow ball-in-ball structure of NiO/Ni/Graphene composites, which not only mitigates the volume expansion of NiO during the cycles but also provides a continuous highly conductive graphene matrix to facilitate the fast charge transfer and form a stable SEI layer.
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