Materials Reports 2020, Vol. 34 Issue (Z1): 132-136 |
INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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Preparation and Properties of Nano Silicon-Hard Carbon Composites by SprayDrying |
PAN Fusen, SHEN Long, TONG Lei, NIE Shunjun, LI Hong
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Shanghai Shanshan Technology Co., Ltd., Research Institute, Shanghai 201209, China |
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Abstract Wet grinding with a sand mill exfoliated a small amount of graphene from flake graphite and added carbon nanotubes to realize the construction of conductive network in the negative electrode material. The nano silicon-hard carbon composite materials were prepared by spray drying. The structure and morphology of the prepared silicon-carbon composite materials were studied by means of laser particle size analyzer, XRD, SEM, etc. Using the prepared negative electrode materials to prepare button half-cells, and testing their electrochemical performance in different modes. The results show that when the amount of lithium carbonate added is 3wt%, the performance of the composite material is the best, the first charge and discharge capacity is 1 279.9 mAh/g, the efficiency is as high as 84.5%, and at 200 mA/g current density, the capacity can still be maintained at 68.8% after 50 cycles.
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Published: 01 July 2020
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About author:: Fusen Pan, graduated from University of Science and Technology of China in July 2016 and received his master's degree in engineering. In 2016, he worked in the Research Institute of Shanghai Shanshan Technology Co., Ltd., mainly engaged in high performance lithium ion battery anode silicon/carbon composite materials. |
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