镍钴锰体系锂离子电池粘结剂性能研究
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摘要
选用高镍三元材料LiNi_(0.6)Co_(0.2)Mn_(0.2)O_2为正极,考察了两种聚偏氟乙烯(PVDF)粘结剂的添加比例对匀浆过程、极片性能、材料容量发挥等的影响。实验结果表明:采用PVDF粘结剂匀浆得到的浆料稳定性良好;胶B抗凝胶作用良好,且粘结性能更加优越;增加胶B用量对极片的导电性能影响不大,但能改善NCM622体系的电化学性能。
The nickel-rich ternary material of LiNi_(0.6)Co_(0.2)Mn_(0.2)O_2 was selected as the cathode. The appendingproportion of two kinds of PVDF binders were adjusted, and the effects on the homogenization process, theperformance of the pole pieces and the material capacity were investigated. The experimental results show that thegood stability of the slurry can be obtained by using PVDF binder. The modified PVDF glue B has excellentanti-coagulation effect, and the bonding performance is superior. The effect of increasing additive amount of glue Bon the conductivity of the pole pieces is not significant, but the electrochemical performance of NCM622 system canbe improved.
The nickel-rich ternary material of LiNi_(0.6)Co_(0.2)Mn_(0.2)O_2 was selected as the cathode. The appendingproportion of two kinds of PVDF binders were adjusted, and the effects on the homogenization process, theperformance of the pole pieces and the material capacity were investigated. The experimental results show that thegood stability of the slurry can be obtained by using PVDF binder. The modified PVDF glue B has excellentanti-coagulation effect, and the bonding performance is superior. The effect of increasing additive amount of glue Bon the conductivity of the pole pieces is not significant, but the electrochemical performance of NCM622 system canbe improved.
引文
[1] LIANG L W, DU K, PENG Z D, et al. Co-precipitation synthesis ofNi0.6Co0.2Mn0.2(OH)2precursor and characterization of LiNi0.6Co0.2-Mn0.2O2cathode material for secondary lithium batteries[J]. Elec-trochimica Acta, 2014, 130:82-89.
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[3]刘嘉铭,张英杰,董鹏,等.锂离子电池正极材料高镍Li-Ni1-x-yCoxMnyO2研究进展[J].硅酸盐学报,2016,44(7):931-941.
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[5]秦兴才.高比能动力锂离子电池开发与产业化技术攻关[J].电源技术,2016,40(10):2082-2083.
[6]王伟东,仇卫华,丁倩倩,等.锂离子电池三元材料—工艺技术及生产应用[M].北京:化学工业出版社,2015:76-79.
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[8]王晕.PVDF粘结剂在锂离子电池中的应用研究[D].上海:复旦大学,2013.
[2]蔡少伟.锂离子电池正极三元材料的研究进展及应用[J].电源技术,2013,37(6):1065-1068.
[3]刘嘉铭,张英杰,董鹏,等.锂离子电池正极材料高镍Li-Ni1-x-yCoxMnyO2研究进展[J].硅酸盐学报,2016,44(7):931-941.
[4]俞会根,王恒,盛军.三元正极材料Li[Ni-Co-Mn]O2的研究进展[J].电源技术,2014,38(9):1749-1752.
[5]秦兴才.高比能动力锂离子电池开发与产业化技术攻关[J].电源技术,2016,40(10):2082-2083.
[6]王伟东,仇卫华,丁倩倩,等.锂离子电池三元材料—工艺技术及生产应用[M].北京:化学工业出版社,2015:76-79.
[7]郭炳坤,徐徽,王先友,等.锂离子电池[M].长沙:中南大学出版社,2002:250.
[8]王晕.PVDF粘结剂在锂离子电池中的应用研究[D].上海:复旦大学,2013.