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Nano-Si: With good performance in solar cells and lithium ion batteries


10th International Conference on Emerging Materials and Nanotechnology

July 27-29, 2017 Vancouver, Canada

Zhihao Yue

Nanchang University, China

ScientificTracks Abstracts: Res. Rev. J Mat. Sci

DOI: 10.4172/2321-6212-C1-002

Abstract

We have done much work about silicon (Si) in solar cells and lithium ion batteries (LIBs). In the aspect of solar cell, we used silver (Ag)-assisted chemical etching method to fabricate black silicon solar cells with efficiency over 18% in 2013 and large-scale production was carried out. Besides, nickel, which is cheaper than Ag, was used as assisted metal to fabricate black silicon structure for the first time and surface reflectance of 1.59% was obtained. In the aspect of LIBs, we used Si powders made from broken Si wafers with different electrical resistivity in semiconductor industry as anode material in LIBs. We found that Si powders made from Si wafers with lower electrical resistivity show better electrochemical performance (higher capacity, and better rate performance) in LIBs. Therefore, broken Si wafers in semiconductor industry should be classified according to their electrical resistivity, which can be convenient for being used as anode raw materials for LIBs.

Biography

Zhihao Yue has his expertise in using nano-silicon structures to improve the efficiency of silicon solar cell and the electrochemical properties of silicon anode materials in lithium ion batteries. He used cheaper metal nickel (compared with silver) as assisted metal to fabricate nanostructures on silicon surface and investigated its etching mechanism deeply, which is the first study about nickel-assisted chemical etching method for black silicon solar cells. Besides, he systematically studied the effect of intrinsic electrical resistivity of silicon materials on its performance in lithium ion batteries for the first time and found that silicon materials with lower electrical resistivity present better charge-discharge properties.

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