UC San Diego
Electrodeposited three-dimensional Ni-Si nanocable arrays as high performance anodes for lithium ion batteries.
- Author(s): Liu, Hao
- Hu, Liangbin
- Meng, Ying Shirley
- Li, Quan
- et al.
Published Web Locationhttp://pubs.rsc.org/en/content/articlepdf/2013/nr/c3nr02635c
A configuration of three-dimensional Ni-Si nanocable array anodes is proposed to overcome the severe volume change problem of Si during the charging-discharging process. In the fabrication process, a simple and low cost electrodeposition is employed to deposit Si instead of the common expansive vapor phase deposition methods. The optimum composite nanocable array electrode achieves a high specific capacity ~1900 mA h g(-1) at 0.05 C. After 100 cycles at 0.5 C, 88% of the initial capacity (~1300 mA h g(-1)) remains, suggesting its good capacity retention ability. The high performance of the composite nanocable electrode is attributed to its excellent adhesion of the active material on the three-dimensional current collector and short ionic/electronic transport pathways during cycling.