Study on the Preparation of GO/LiMn2O4 Film Electrode and Its Lithium Extraction Property

被引：0
|
作者：
Zhang F. [1 ,2 ,3 ]
Ji Z. [1 ,2 ,3 ,4 ]
Wang J. [1 ,2 ,3 ]
Guo Z. [1 ,2 ,3 ]
Fang J. [1 ,2 ,3 ]
Guo X. [1 ,2 ,3 ]
Zhao Y. [1 ,2 ,3 ]
Liu J. [1 ,2 ,3 ]
Yuan J. [1 ,2 ,3 ]
机构：
[1] National-Local Joint Engineering Laboratory of Chemical Energy Saving Process Integration and Resource Utilization, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin
[2] Engineering Research Center of Seawater Utilization of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin
[3] Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin
[4] Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin
来源：
Cailiao Daobao/Materials Reports | 2022年 / 36卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Electrochemical adsorption; Graphene oxide; Lithium manganate; Selectivity;
D O I：
10.11896/cldb.21040052
中图分类号：
学科分类号：
摘要：
It is essential to achieve efficient lithium extraction to meet the market demand of lithium products from salt lake brine, geothermal water and seawater. Electrochemical adsorption is a low-cost and environment-friendly technology for lithium extraction, which has great development prospects. Based on the LiMn2O4 material, CGO-LiMn2O4, LDGO-LiMn2O4 and LGO-LiMn2O4 were prepared by doping conventional graphene oxide (CGO), low defect graphene oxide (LDGO) and large diameter graphene oxide LGO), respectively, and their lithium extraction properties were investigated as well. The results showed that the addition of different graphene oxide (GO) was beneficial to improving the lithium extraction rate, lithium extraction capacity and Li+ selectivity of film electrodes. The film electrode doped with LGO showed the best lithium extraction perfor-mance, the lithium extraction capacity of 35.29 mg/g, the lithium extraction rate of 1.044 mg/(g•min) and the separation coefficient from Mg to Li of 588.30. Combined with the analysis and characterization, it was considered that GO had a large specific surface area, which could provide more 'Effective lithium ions' for the film electrode surface, thus effectively improving the lithium extraction capacity; at the same time, after the cation was embedded in the GO layer, the layer spacing was fixed, which could block the entry of large radius ions and improve the selectivity for Li+. Because LGO had larger plate diameter and higher graphitization degree, the conductivity of the corresponding film electrode was better, and the overall lithium extraction effect was better. © 2022, Materials Review Magazine. All right reserved.
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