Open Access Nano Idea

Patterned Si thin film electrodes for enhancing structural stability

Gyu-bong Cho, Jung-pil Noh, Ho-jin Sung, Sang-hun Lee, Yeon-min Im, Hyo-jun Ahn and Ki-won Kim*

Author affiliations

School of Materials Science and Engineering, Research Institute for Green Energy Convergence Technology, Gyeongsang National University, Gazwadong 900, Jinju, Gyeongnam 660-701, Korea

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Citation and License

Nanoscale Research Letters 2012, 7:20  doi:10.1186/1556-276X-7-20

Published: 5 January 2012

Abstract

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.

Keywords:
patterned electrode; silicon film; stress; anode