Electrochemical behavior of Li/LiV3O8 secondary cells
Electrochemical behavior of Li/LiV3O8 secondary cells
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Li/LiV3O8 二次电池的电化学行为
DOI：
10.1007/s13391-012-2121-z
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发表时间：
2013
影响因子：
2.4
通讯作者：
W. Yoon
中科院分区：
文献类型：
--
作者：
H. Bak;Jae Ha Lee;Bok Ki Kim;W. Yoon
制备了锂箔阳极和锂粉阳极的Li/LiV3O8二次电池，并对其电学性能进行了比较。使用粉末阳极，获得了初始放电容量为260 mAh g−1的电池，可运行100次以上。通过将乳化液液滴压在SUS网上，安全合成了多孔锂粉电极。通过使用振动锅磨机添加碳，使LiV3O8阴极的电导率提高了三倍。在第100次循环时，粉末阳极的容量保留率为80%，而箔电极的容量保留率为46%；1.0 Crate/ 0.1 C-rate的容量比率也从44%增加到60%。采用该材料制备的电池具有较好的电学性能，循环50次后电池容量保持率达90%，倍率容量比提高。采用x射线衍射和扫描电镜研究了LiV3O8-C复合材料的晶体结构和形貌。
Li/LiV3O8 secondary cells with Li-foil and Li-powder anodes were fabricated, and their electrical properties were compared. Using the powder anode, a cell with an initial discharge capacity of 260 mAh g−1 that could be operated for over 100 cycles was obtained. The porous Li-powder electrode was safely synthesized by pressing an emulsion droplet onto an SUS mesh. A threefold increase in the electrical conductivity of the LiV3O8 cathode was achieved by the addition of carbon using a vibration pot mill. Using the powder anode resulted in 80% capacity retention at the 100th cycle, while that using the foil electrode was 46%; the 1.0 Crate/ 0.1 C-rate capacity ratio also increased from 44% to 60%. A cell employing the LiV3O8-carbon composite cathode showed better electrical performance, a capacity retention of 90% after 50 cycles, and an increase in rate capacity ratio. The crystal structure and morphology of the LiV3O8-C composite were investigated by x-ray diffraction and scanning electron microscopy.