摘要
金属锂电解过程工艺参数对电流效率影响较大,优化工艺制度可以显著提升电流效率,降低生产成本。采用单因素实验研究了电解温度、电流密度、LiCl与KCl质量比以及极间距对电流效率的影响,进而以响应曲面法BOX-Behnken复合设计原理为基础,建立了响应曲面模型,探究了各工艺参数交互作用对电流效率的影响,并实验验证了模型的可靠性。结果表明:优化后的工艺参数为电解温度405.338℃、电流密度0.794 A/cm^(2)、LiCl与KCl质量比1.116、极间距9.345 cm,预测电流效率为94.32%,实验验证最终得到电流效率平均值为93.95%,与预测值偏差较小,说明模型准确性较高。
The process parameters in the electrolytic production of metallic lithium have a significant impact on current efficiency,and optimizing the process conditions can significantly improve current efficiency and reduce production costs.Single-factor experiments were conducted to investigate the effects of electrolysis temperature,current density,LiCl to KCl mass ratio,and electrode spacing on current efficiency.Subsequently,based on the Box-Behnken composite design principle,a response surface model was established to explore the effects of interaction of these process parameters on current efficiency.The reliability of the model was experimentally validated.The results demonstrated that the optimized process parameters are electrolysis temperature of 405.338℃,current density of 0.794 A/cm^(2),LiCl to KCl mass ratio of 1.116,and electrode spacing of 9.345 cm.The predicted current efficiency is 94.32%,while the average current efficiency experimentally validated reaches 93.95%,showing only a minor deviation from the predicted value.This confirms the high accuracy of the model.
作者
莫川
刘强
赵垓
陈秋旭
刘杨
徐川
Mo Chuan;Liu Qiang;Zhao Gai;Chen Qiuxu;Liu Yang;and Xu Chuan(Chongqing Tianqi Lithium Co.,Ltd.,Tongliang 402560,China;Lithium Resources and Materials Key Laboratory of Sichuan Province,Chengdu 610000,China;Tianqi Xinlong Technology(Chengdu)Co.,Ltd.,Chengdu 610000,China)
出处
《轻金属》
2025年第4期31-39,共9页
Light Metals
基金
四川省重点研发项目(2022YFG0124)
四川省自然科学基金项目(2024NSFSC0212)。
关键词
锂电解槽
电解工艺
电流效率
金属锂
响应曲面法
lithium electrolytic cell
electrolytic process
current efficiency
metallic lithium
Response Surface Methodology(RSM)
作者简介
莫川(1993-),男,四川广安人,硕士,主要从事熔盐电解制备金属锂相关研究。E-mail:1149572670@qq.com;通讯作者:刘强(1988-),男,四川南充人,硕士,主要从事金属锂绿色高效制备及金属锂基新材料开发。
