Novel Design of Nanostructured Si anode on Nanohair Array Polymer Substrate
- Novel Design of Nanostructured Si anode on Nanohair Array Polymer Substrate
- Nanostructure; Si Anode; Polymer substrate
- Issue Date
- The Minerals, Metals and Materials Society (TMS)
- 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.
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