期刊
CHEMSUSCHEM
卷 8, 期 17, 页码 2948-2955出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201500149
关键词
aerogels; energy conversion; graphene; sodium; tin
资金
- Commonwealth of Australia through the Automotive Australia Cooperative Research Centre (AutoCRC)
- Fundamental Research Funds for the Central Universities of China [NE2014301]
Low-cost and sustainable sodium-ion batteries are regarded as a promising technology for large-scale energy storage and conversion. The development of high-rate anode materials is highly desirable for sodium-ion batteries. The optimization of mass transport and electron transfer is crucial in the discovery of electrode materials with good high-rate performances. Herein, we report the synthesis of 3D interconnected SnO2/graphene aerogels with a hierarchically porous structure as anode materials for sodium-ion batteries. The unique 3D architecture was prepared by a facile in situ process, during which cross-linked 3D conductive graphene networks with macro-/meso-sized hierarchical pores were formed and SnO2 nanoparticles were dispersed uniformly on the graphene surface simultaneously. Such a 3D functional architecture not only facilitates the electrode-electrolyte interaction but also provides an efficient electron pathway within the graphene networks. When applied as anode materials in sodium-ion batteries, the as-prepared SnO2/graphene aerogel exhibited high reversible capacity, improved cycling performance compared to SnO2, and promising high-rate capability.
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