| 锂在锂离子电池石墨电极中电化学嵌脱层的可逆性 |
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| 引用本文： | 苏玉长,尹志民,徐仲榆.锂在锂离子电池石墨电极中电化学嵌脱层的可逆性[J].中南大学学报(自然科学版),2000,31(6):540-543. |
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| 作者姓名： | 苏玉长 尹志民 徐仲榆 |
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| 作者单位： | 1. 中南大学材料科学与工程系，湖南长沙410083
2. 湖南大学新型碳材料研究所，湖南长沙410082 |
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| 基金项目： | 湖南省自然科学基金资助项目(99JJY20047)；高等学校骨干教师基金资助项目(99) |
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| 摘 要： | 对石墨化热处理温度与其充放电性能的关系以及锂在石墨负极中不能可逆嵌脱的原因进行了研究．在不同的最高热处理温度(t
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| 关 键 词： | 焦碳 石墨化 嵌脱层 可逆性 |
| 文章编号： | 1005-9792(2000)06-0540-04 |
| 修稿时间： | 2000年6月30日 |
The reversibility of graphite electrode of lithium electrochemical intercalation for the lithium-ion rechargeable batteries |
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| Su Yu-chang,XU Zhong-yu,YIN Zhi-Min.The reversibility of graphite electrode of lithium electrochemical intercalation for the lithium-ion rechargeable batteries[J].Journal of Central South University:Science and Technology,2000,31(6):540-543. |
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| Authors: | Su Yu-chang XU Zhong-yu YIN Zhi-Min |
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| Abstract: | The effects of heat treatment temperature on the charging-discharging performance of graphite materials andthe reason have been studied. One kind of petroleum coke andone kind of needle coke were graphitized at different maxi-mum heat trealment temperature ( tmax are 2 000, 2 250, 2500, 2 750, 3 000 ℃ ). The crystallite parameters of thisgraphitized products were studied by X-ray diffraction and Raman spectrums. The capacity and the reversibility of electro-chemical intercalation-deintercalation of lithium into this graphitized products were studied by galvanostafic method andin-situ X-ray diffraction. The results show that the appropriate heat treatment temperature must be considered in order toget the materials with the best electrochemical performance, and tmax depends on precursor cokes. We find that the degreeof graphitized can′t be too high and a small quantity of sp3 bond must exist to connect the carbon plans together and toavoid the exfoliation of graphite microcrystallites during charging and discharging |
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| Keywords: | coke graphitized intercalation deintercalation reversibility |
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