Electrodeposited three-dimensional Ni-Si nanocable arrays as high performance anodes for lithium ion batteries.
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.
Department of Physics, The Chinese University of Hong Kong, Shatin, New Territory, Hong Kong. liquan@phy.cuhk.edu.hk.
Hao
H
Liu
Liangbin
L
Hu
Ying Shirley
YS
Meng
Quan
Q
Li
D011211:Electric Power Supplies; D004566:Electrodes; D004595:Electroplating; D005740:Gases / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D008094:Lithium / Q000737:chemistry*; D053770:Nanowires / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*
D005740:Gases; D007477:Ions; D009532:Nickel; D008094:Lithium; D012825:Silicon