SiOx-based anodes for secondary lithium batteries
SiOx-based anodes for secondary lithium batteries
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DOI：
10.1016/s0167-2738(02)00362-4
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发表时间：
2002-12-01
影响因子：
3.2
通讯作者：
Yamamoto, O
中科院分区：
文献类型：
--
作者：
Yang, J;Takeda, Y;Yamamoto, O
研究了不同氧含量和粒径的氧化硅粉末作为锂离子电池负极材料的性能。SiO0.8电极的可逆容量约为100 mAh。1600 mA h/g，电压范围为0.02至1.4 V（相对于Li）。容量随着氧含量的增加而下降。然而，有限的锂插入抑制了主体体积膨胀，从而显著提高了循环能力。此外，循环性能还取决于电极制造方法。通过粉末混合和压制，电极显示出更大的插入容量，但是使用N-甲基吡咯烷酮（NMP）溶剂分散PVdF粘合剂抑制了循环时的容量衰减，（C）2002由Elsevier Science B. V.
Silicon oxide powders with different oxygen contents and particle sizes have been examined as anode materials for lithium ion batteries. SiO0.8 electrode can provide a reversible capacity of ca. 1600 mA h/g over a voltage range from 0.02 to 1.4 V vs. Li. The capacity drops with the increase in the oxygen content. Limited lithium insertion, however, alleviates the host volume expansion and thereby significantly improves the cyclability. In addition, the cycle performance is also dependent on the electrode fabrication method. By powder mixing and pressing, the electrode shows a larger insertion capacity, but the use of N-methyl-pyrrolidone (NMP) solvent for dispersing PVdF binder suppresses the capacity fade on cycling, (C) 2002 Published by Elsevier Science B.V.