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材料导报  2022, Vol. 36 Issue (11): 21040052-7    https://doi.org/10.11896/cldb.21040052
  无机非金属及其复合材料 |
GO/LiMn2O4膜电极构建及其提锂性能研究
张帆1,2,3, 纪志永1,2,3,4, 汪婧1,2,3, 郭志远1,2,3, 方嘉炜1,2,3, 郭小甫1,2,3, 赵颖颖1,2,3, 刘杰1,2,3, 袁俊生1,2,3
1 河北工业大学化工学院,化工节能过程集成与资源利用国家-地方联合工程实验室,天津 300130
2 河北工业大学化工学院,海水资源高效利用化工技术教育部工程研究中心,天津 300130
3 河北省现代海洋化工技术协同创新中心,天津 300130
4 河北工业大学化工学院,天津市本质安全化工技术重点实验室,天津 300130
Study on the Preparation of GO/LiMn2O4 Film Electrode and Its Lithium Extraction Property
ZHANG Fan1,2,3, JI Zhiyong1,2,3,4, WANG Jing1,2,3, GUO Zhiyuan1,2,3, FANG Jiawei1,2,3, GUO Xiaofu1,2,3, ZHAO Yingying1,2,3, LIU Jie1,2,3, YUAN Junsheng1,2,3
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 300130, China
2 Engineering Research Center of Seawater Utilization of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
3 Hebei Collaborative Innovation Center of Modern Marine Chemical Technology, Tianjin 300130, China
4 Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
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摘要 实现盐湖卤水、地热水、海水等溶存态锂资源的高效提取对于满足强劲的锂产品市场需求至关重要。电化学吸附是一种低成本、环境友好的提锂技术,极具发展前景。本工作基于LiMn2O4材料,通过分别掺入常规氧化石墨烯(CGO)、低缺陷氧化石墨烯(LDGO)和大片径氧化石墨烯(LGO),制备CGO-LiMn2O4、LDGO-LiMn2O4和LGO-LiMn2O4膜电极,并对其提锂性能进行考察。结果表明,不同氧化石墨烯(GO)的掺入均有利于提升膜电极的提锂容量、提锂速率及对Li+的选择性;掺入LGO的膜电极表现出最优的提锂性能,提锂容量达到35.29 mg/g,提锂速率达1.044 mg/(g·min),镁锂分离系数高达588.30。结合分析与表征认为,GO由于具有较大的比表面,可为膜电极表面提供更多的“有效锂离子”,使得提锂容量有效提升;同时,阳离子嵌入GO片层后固定层间距,进而阻挡大半径离子进入,使得其对Li+的选择性提高;因LGO具有更大的片径和更高的石墨化度,使得对应膜电极的导电性更好,整体提锂效果更优。
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张帆
纪志永
汪婧
郭志远
方嘉炜
郭小甫
赵颖颖
刘杰
袁俊生
关键词:  氧化石墨烯  锰酸锂  选择性  电化学吸附    
Abstract: 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.
Key words:  graphene oxide    lithium manganate    selectivity    electrochemical adsorption
发布日期:  2022-06-09
ZTFLH:  TQ15  
基金资助: 国家自然科学基金(21978064);河北省自然科学基金(B2019202423);天津市自然科学基金(19JCYBJC20400)
通讯作者:  jizhiyong@gmail.com   
作者简介:  张帆,2018年6月毕业于河北科技大学,获得工学学士学位。现为河北工业大学化工学院的硕士研究生,指导老师是纪志永教授。主要研究方向是溶存化学资源利用与环境保护。
纪志永,教授,博士研究生导师。2001年本科毕业于河北工业大学化工学院化工工艺专业,2004年硕士毕业于河北工业大学化工学院化学工艺专业,2007年博士毕业于天津大学化学工程专业。2007年4月至今,先后在河北工业大学化工学院、海水利用中心和海洋科学与工程学院从事教学科研工作。研究方向为海/卤水及废水中钾、锂、溴等分离纯化及能源挖掘,含盐废水的深度处理与资源化利用及减量化处置,水环境监测与修复及水质基准研究。在国内外重要期刊发表科技论文82篇(SCI/EI收录46篇),参与出版著作1部。
引用本文:    
张帆, 纪志永, 汪婧, 郭志远, 方嘉炜, 郭小甫, 赵颖颖, 刘杰, 袁俊生. GO/LiMn2O4膜电极构建及其提锂性能研究[J]. 材料导报, 2022, 36(11): 21040052-7.
ZHANG Fan, JI Zhiyong, WANG Jing, GUO Zhiyuan, FANG Jiawei, GUO Xiaofu, ZHAO Yingying, LIU Jie, YUAN Junsheng. Study on the Preparation of GO/LiMn2O4 Film Electrode and Its Lithium Extraction Property. Materials Reports, 2022, 36(11): 21040052-7.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21040052  或          http://www.mater-rep.com/CN/Y2022/V36/I11/21040052
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