摘要
采用柠檬酸络合法制备中间相碳微球(Mesocarbon microbeads,以下用C表示)改性的LiMn2O4。通过X射线衍射、循环伏安、电化学阻抗、充放电测试对模拟电池性能进行了测试。结果表明:C的加入有助于Li+在正负极之间嵌入和脱嵌,其中w(C)为3%时效果最好,首次放电容量达128.82mAh/g,经过30次循环后的比容量为119.58mAh/g,说明C加入增大了比容量,稳定了其循环性能。
The C-modified LiMn2O4 was synthesized by citric acid method and characterized by X-ray diffraction, cyclic voltammetry （CV）, electrochemical impedance spectroscopy （EIS） and constant current charge/discharge. Obtained results show that the addition of C is favorable for Li^＋ insertion and extraction. The samples with 3 % C （mass fraction） reveal better performance, giving initial discharge capacity of 128.82 mAh/g and remain specific capacity of 119.58 mAh/g after 30 cycles. The results indicate that the better cycling property is brought by addition of C.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2007年第9期47-50,共4页
Electronic Components And Materials
基金
哈尔滨工程大学基础研究基金资助项目(HEUF04064)
