Patterned Si thin film electrodes for enhancing structural stability.
A patterned film (electrode) with lozenge-shaped Si tiles could be successfully fabricated by masking with an expanded metal foil during film deposition. Its electrochemical properties and structural stability during the charge-discharge process were examined and compared with those of a continuous (conventional) film electrode. The patterned electrode exhibited a remarkably improved cycleability (75% capacity retention after 120 cycles) and an enhanced structural stability compared to the continuous electrode. The good electrochemical performance of the patterned electrode was attributed to the space between Si tiles that acted as a buffer against the volume change of the Si electrode.
School of Materials Science and Engineering, Research Institute for Green Energy Convergence Technology, Gyeongsang National University, Gazwadong 900, Jinju, Gyeongnam 660-701, Korea. kiwonkim@gnu.ac.kr.
Gyu-Bong
GB
Cho
Jung-Pil
JP
Noh
Ho-Jin
HJ
Sung
Sang-Hun
SH
Lee
Yeon-Min
YM
Im
Hyo-Jun
HJ
Ahn
Ki-Won
KW
Kim