Study on Thermal Stability of Cathode Materials for Lithium-ion Batteries AITranslate

1冯婷,王睿,王京玥,王磊营,石沁灵,王立帆,詹纯.压电材料K_(0.5)Na_(0.5)NbO_(3)表面修饰高镍正极材料LiNi_(0.83)Co_(0.12)Mn_(0.05)O_(2)的电化学性能研究[J].稀有金属与硬质合金,2022,50(5):89-95. 被引量：1

5李丽娟,朱振东,代娟,王蓉蓉,彭文.锂离子电池正极材料Li[Ni_(x)Co_(y)Mn_(z)]O_(2)(x=0.6,0.85)相变对比[J].电化学,2021,27(4):405-412. 被引量：2

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Chinese Library Classification Number:TM911[电气工程—电力电子与电力传动]

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The thermal decomposition of ternary materials and electrolyte was systematically studied by differential scanning calorimetry(DSC).The effects of different potentials and the amount of electrolyte on the thermal decomposition of ternary materials were analyzed.The results show that the thermal decomposition process of ternary materials undergoes a structural transformation from lamellar structure to spinel and then to rock-salt phase,accompanied by the precipitation of oxygen.The higher the Ni content and the higher the potential,the worse the thermal stability of the ternary material with lower thermal decomposition temperature and greater thermal decomposition enthalpy.For high-nickel materials,there is a corresponding relationship between the thermal stability and the structural phase change during charging,and there is an obvious difference in thermal stability at the phase transition point.The decomposition of electrolyte goes through the endothermic process of lithium salt decomposition and the exothermic process of the reaction of decomposition products with gasification solvent,and the addition amount of electrolyte has a great influence on the thermal decomposition process of ternary materials.