LITHIUM-ION RECHARGEABLE BATTERIES WITH LICOO2 AND CARBON ELECTRODES - THE LICOO2 C SYSTEM
LITHIUM-ION RECHARGEABLE BATTERIES WITH LICOO2 AND CARBON ELECTRODES - THE LICOO2 C SYSTEM
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DOI：
10.1016/0167-2738(94)90411-1
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发表时间：
1994-08-01
影响因子：
3.2
通讯作者：
OZAWA, K
中科院分区：
文献类型：
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作者：
OZAWA, K
具有LiCoO 2阴极和不可石墨化碳阳极的锂离子可充电电池具有高能量密度（18650中253 Wh/l）。 通过使用含有碳酸丙烯酯/碳酸二乙酯的LiPF 6电解质溶液，即使在适度高温下也可以获得优异的循环性能，这是因为（1）LiCoO 2保持稳定，以及（2）不可石墨化碳在Li掺杂/去掺杂能力方面表现出良好的循环性能。 虽然在充放电循环期间在碳表面上形成薄膜，但是在500次循环之后放电容量劣化仅为10至20%。 此外，即使电池过充电，（1）通过提供当阴极中的Li 2CO 3分解时操作的防过充电安全装置和（2）通过使用由于过充电电流而在高温下关闭的聚烯烃隔板，也可以获得安全性。
Lithium-ion rechargeable battery with LiCoO2 cathode and non-graphitizable carbon anode has high energy density (253 Wh/l in 18650). By using LiPF6 containing propylene carbonate/diethyl carbonate electrolyte solution, excellent cycle performance can be obtained even at a moderately high temperature, because (1) LiCoO2 remains stable, and (2) non-graphitizable carbon exhibits a good cyclability with respect to Li-doping/undoping capability. Although a thin film is formed on the carbon surface during charge and discharge cycling, the discharge capacity degradation is only 10 to 20% after 500 cycles. Furthermore, even if the cell is overcharged, safety can be attained (1) by providing an anti-overcharging safety device which operates when Li2CO3 in the cathode is decomposed and (2) by using a polyolefin separator which shuts down at a high temperature due to overcharge current.