【作者】 马海燕； 周倩； 杨化滨；

【Author】 Ma Haiyan;Zhou Qian;Yang Huabin~* (Institute of New Energy Material Chemistry,Nankai University,Tianjin 300071)

【机构】 南开大学新能源材料化学研究所；

【摘要】 采用高能球磨法制备了SiCoC负极材料,对其组成进行了优化。结果显示,当Si、Co和C的质量比为20:10:70时,具有最优的电化学性能。XRD结果表明,所得的Si₂₀Co₁₀C₇₀材料只是三种单质简单的混合。恒流充放电结果表明,首周充放电容量分别为1068.8和1283.3 mAh/g,首周库伦效率为83.3%。循环50周后,容量稳定在610 mAh/g。更多还原

【Abstract】 A series of SiCoC materials with different compositions are prepared by a high energy ball-milling method.The results show that the Si₂₀Co₁₀C₇₀ material has the most promising electrochemical performance. XRD results indicate that no new phases are observed.The galvanostatic charge/discharge tests indicate that the initial charge/discharge capacity of the Si₂₀Co₁₀C₇₀ material is 1068.8 and 1283.3 mAh/g,respectively,and the coulombic efficiency is 83.3%.After 50 cycles,the remained capacity reaches 610 mAh/g.更多还原