| 锂离子电池正极材料Li_xNi_(0.8)Co_(0.15)Al_(0.05)O_2热失控机理研究 |
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| 引用本文： | 王子港,魏晓玲,杨朗,杨晖.锂离子电池正极材料Li_xNi_(0.8)Co_(0.15)Al_(0.05)O_2热失控机理研究[J].电源技术,2010,34(11). |
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| 作者姓名： | 王子港 魏晓玲 杨朗 杨晖 |
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| 作者单位： | 南京工业大学新能源材料研究所锂离子电池安全性研究与测试中心,江苏南京,210009 |
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| 基金项目： | 江苏省自然科学基金项目(BK200718) |
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| 摘 要： | 采用(DSC)、(TGA)及(XRD)对不同充电状态的正极材料LixNi0.8Co0.15Al0.05O2的热失控机理进行研究。结果表明,LixNi0.8Co0.15Al0.05O2材料在高温时晶体结构将变形、倒塌并释放出部分游离氧,导致有机电解液燃烧,释放出大量热量,并计算出DSC曲线中四个放热峰的活化能依次为:154、169、126、141 kJ/mol。
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| 关 键 词： | 锂离子电池 正极材料 活化能 脱锂程度 热稳定性 |
Investigation of thermal runaway mechanism of Li-ion batteries cathode Li_xNi_(0.8)Co_(0.15)Al_(0.05)O_2 |
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| WANG Zi-gang,WEI Xiao-ling,YANG Lang,YANG Hui.Investigation of thermal runaway mechanism of Li-ion batteries cathode Li_xNi_(0.8)Co_(0.15)Al_(0.05)O_2[J].Chinese Journal of Power Sources,2010,34(11). |
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| Authors: | WANG Zi-gang WEI Xiao-ling YANG Lang YANG Hui |
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| Affiliation: | WANG Zi-gang,WEI Xiao-ling,YANG Lang,YANG Hui(Center for Safety of Li-ion Cell,College of Materials Science and Engineering,Nanjing University of Technology,Nanjing Jiangsu 210009,China) |
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| Abstract: | The thermal runaway mechanism of cathode LixNi0.8Co0.15Al0.05O2 under different charging states were evaluated by DSC,TGA and XRD.The results show that the crystal structure of LixNi0.8Co0.15Al0.05O2 collapses and oxygen liberation is released at elevated temperatures,resulting in burning of the organic electrolyte and releasing of a lot of heat.The activation energy of the four exothermic peaks in DSC traces is 154,169,126,141 kJ/mol respectively. |
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| Keywords: | lithium-ion batteries cathode material activation energy delithiated degree thermal stability |
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