期刊
ADVANCED ENERGY MATERIALS
卷 6, 期 24, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201600918
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资金
- AFOSR [FA9550-14-1-0111]
- National Council for Scientific and Technological Development (CNPq)-Ministry of Science, Technology and Innovation-Brazil
- EMD-Merck
Described here is the production and characterization of a scalable method to produce 3D structured lithium ion battery anodes using free-standing papers of porous silicon nanowires (Si-NW) and graphene nanoribbons (GNRs). Using simple filtration methods, GNRs and Si-NWs can be entangled into a mat thereby forming Si-NW GNR papers. This produces anodes with high gravimetric capacity (up to 2500 mA h g(-1)) and high areal and volumetric capacities (up to 11 mA h cm(-2) and 3960 mA h cm(-3)). The compact structure of the anode is possible since the GNR volume occupies a high proportion of empty space within the composite paper. These Si-NW/GNR papers have been cycled for over 300 cycles, exhibiting a stable life cycle. Combined with LiCoO2 nanowires, a full battery is produced with high energy density (386 Wh kg(-1)), meeting requirements for high performance devices.
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