镍钴铝酸锂前驱体Ni_(0.80)Co_(0.15)Al_(0.05)(OH)_2洗涤降硫工艺
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摘要
采用Na_2CO_3溶液洗涤镍钴铝酸锂前驱体Ni_(0.80)Co_(0.15)Al_(0.05)(OH)_2以降低杂质S含量,研究了c(Na_2CO_3)和洗涤温度对降S效果的影响。在c(Na_2CO_3)=0.5 mol/L和洗涤温度为70℃的洗涤工艺条件下,S含量可以控制在8×10~(-4)以内,并且前驱体Al含量保持稳定,优于Na OH溶液洗涤效果。此外,采用Na_2CO_3溶液洗涤也未影响到前驱体的粒度分布、微观形貌和晶体结构。因此,采用Na_2CO_3溶液洗涤是一种非常有效的洗涤降硫方法。
Na_2CO_3 solution was used as a washing solution to reduce sulfur content of Ni_(0.80)Co_(0.15)Al_(0.05)(OH)_2 precursor,and the influence of concentrate of c(Na_2CO_3) and washing temperature on the S reduction were studied. When the concentration of Na_2CO_3 is 0.5 mol/L and the washing temperature is 70 ℃, the sulfur content can be lower than 8×10-4, and Al content can be retained, which is better than NaOH solution. In addition, the particle size distribution,micro-morphology and crystal structure of Ni_(0.80)Co_(0.15)Al_(0.05)(OH)_2 are unchanged after washing by Na_2CO_3 solution. The results show that washing process with Na_2CO_3 solution is effective to reduce sulfur content of Ni_(0.80)Co_(0.15)Al_(0.05)(OH)_2 precursor.
Na_2CO_3 solution was used as a washing solution to reduce sulfur content of Ni_(0.80)Co_(0.15)Al_(0.05)(OH)_2 precursor,and the influence of concentrate of c(Na_2CO_3) and washing temperature on the S reduction were studied. When the concentration of Na_2CO_3 is 0.5 mol/L and the washing temperature is 70 ℃, the sulfur content can be lower than 8×10-4, and Al content can be retained, which is better than NaOH solution. In addition, the particle size distribution,micro-morphology and crystal structure of Ni_(0.80)Co_(0.15)Al_(0.05)(OH)_2 are unchanged after washing by Na_2CO_3 solution. The results show that washing process with Na_2CO_3 solution is effective to reduce sulfur content of Ni_(0.80)Co_(0.15)Al_(0.05)(OH)_2 precursor.
引文
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[4]HAN C J,YOON J H,CHO W I,et al.Electrochemical properties of LiNi0.8Co0.2 xAlxO2prepared by a sol-gel method[J].Journal of Power Sources,2004,136(1):132-138.
[5]YANG H Z,LIU P X,CHEN Q L,et al.Fabrication and characteristics of high-capacity LiNi0.8Co0.15Al0.05O2with monodisperse yolk-shell spherical precursors by a facile method[J].RSC Advances,2014,67(4):35522-35527.
[6]王伟东,仇卫华,丁倩倩.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,2015:213.
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