目的提高锂离子电池锗基材料的电化学性能。方法采用电泳和离子液体电沉积制备乙炔黑/锗负极材料,用SEM,Raman和充放电循环等手段表征其结构和性能。结果乙炔黑/锗负极材料在0.2 C倍率下循环100次,比容量依然可达到600 mAh/g以上。结论乙炔黑/锗负极材料的电化学性能明显优于单独锗材料和碳材料。
ABSTRACT:Objective To improve the electrochemical performance of the germanium materials of lithium-ion batteries. Methods Germanium nanoparticles ( Ge-NPs) and acetylene black anodes were fabricated through electrodeposition of Ge in the new-genera-tion ionic liquids on the surface of acetylene black which was electrophoretically deposited on a copper current collector. The struc-ture and electrochemical properties were characterized by electron microscopy, Raman spectroscopy and constant current charge-discharge methods. Results The acetylene black-Ge nanocomposite exhibited the electrochemical cycling properties of over 600 mAh/g at 0. 2C after 100 cycles. Conclusion The electrochemical performance of composite was obviously better than Ge or acety-lene black by itself as anode electrode material.
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