Journal
ELECTROCHIMICA ACTA
Volume 390, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2021.138809
Keywords
Plasma; Silicon anode; Polymer binder; Lithium-ion battery; Electrochemical performance
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Funding
- National Nat-ural Science Foundation of China (NSFC) [21246002]
- Min-jiang Scholarship of Fujian Province [MinGaojiao [2010] -117]
- Central-government Guided Fund for Local Economic Development [830170778]
- R&D Fund for Strategic Emerging Industry of Fu-jian Province [82918001]
- International Cooperation Project of Fujian Science and Technology Department [830170771]
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Crystalline silicon nanoparticles coated with an amorphous silicon layer were prepared by continuously pyrolysing a mixture of silane and hydrogen in a non-thermal arc plasma reactor. The role of hydrogen in controlling the thickness of the amorphous silicon layer and improving the electrochemical performance of the silicon anode was investigated through experiments. Introducing a three-component polymer binder effectively tolerated the volume expansion of silicon, resulting in an excellent electrochemical performance of the silicon anode.
The crystalline silicon nanoparticles coated with an amorphous silicon layer was prepared by continuously pyrolysing the mixture of silane and hydrogen in a non-thermal arc plasma reactor. The hydrogen in the gas mixture effectively controls the thickness of the amorphous silicon layer and further improves the electrochemical performance of the silicon anode. The mechanism of the hydrogen was investigated by experiments. At the same time, a three-component polymer binder was concocted and introduced to tolerate the volume expansion of silicon effectively. Combining the silicon nanoparticles prepared at the optimal conditions with the novel polymer binder, the resulting silicon anode exhibits excellent electrochemical performance of 2120 mAh g(-1) at 400 mA g(-1) after 100 cycles.
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