Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 3, Pages 1693-1698Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am5072755
Keywords
lithium-ion battery; sandwich architecture; Si-based anode; carbon clothing
Funding
- National Basic Research Program of China [2013CB934003]
- 863program [2013AA050902]
- National Nature Science Foundation of China [21273019]
- Guangdong Industry-Academy-Research Alliance [2013C2FC0015]
- Program of Introducing Talents of Discipline to Universities [B14003]
- Science and Technology Plan Project of Tangshan City [14130278a]
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Si-based electrodes for lithium ion batteries typically exhibit high specific capacity but poor cycling performance. A possible strategy to improve the cycling performance is to design a novel electrode nanostructure. Here we report the design and fabrication of Ni/Si-nanoparticles/graphite clothing hybrid electrodes with a sandwich structure. An efficient dip-coating of Si-NPs combined with carbon deposition was adopted to synthesize the unique architecture, where the Si-NPs are sandwiched between the Ni matrix and the graphite clothing. This material architecture offers many critical features that are desirable for high-performance Si-based electrodes, including efficient ion diffusion, high conductivity, and structure durability, thus ensuring the electrode with outstanding electrochemical performance (reversible capacity of 1800 mA h g(-1) at 2 A g(-1) after 500 cycles). In addition, the hybrid anode does not require any polymeric binder and conductive additives and holds great potential for application in Li-ion batteries.
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