Novel Design of Nanostructured Si anode on Nanohair Array Polymer Substrate

Title
Novel Design of Nanostructured Si anode on Nanohair Array Polymer Substrate
Authors
최인석
Keywords
Nanostructure; Si Anode; Polymer substrate
Issue Date
2013-03
Publisher
The Minerals, Metals and Materials Society (TMS)
Abstract
We introduced a new design of nanostructured Si anodeon a Polyimide (PI) substrate for future applications of flexible energy storage devices. Unlike other technique to fabricate nanostructure Si anodes, amorphous-Si was deposited directly on the polymer substrate having nano-hair likesurface structure. This unique nanostructuredSi anode hindersthe delamination of an anode component resulting in higher capacity and longer life cycle than that of a-Si on the non- PI substrate or ona typical Cu foil substrate. After 100 cycles of half-cell test, the capacity of the a-Si on nanohair array PI substrate was approximately 1,500 mAh/g, whereas a-Si on pristine PI and Cu foil was 625 and 130mAh/g respectively.Furthermore, better reversible capacity from various charge/discharge rates was achieved owing to larger surface to volume ratio of nanohairs structures.We also investigated surface morphologies after cycling test to explain the effectiveness of the nanostructured Si anode.
URI
http://pubs.kist.re.kr/handle/201004/46858
Appears in Collections:
KIST Publication > Conference Paper
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