摘要
可控核聚变被认为是人类的终极能源,而清洁、经济、高效的锂同位素特别是6Li核心燃料供应对核聚变发展具有重要战略意义。然而,现有的锂同位素分离工艺存在分离系数受限和环境污染严重等问题,难以满足未来巨大的锂同位素需求。锂超离子导体已展现出锂同位素分离应用潜力,但是目前对其分离工艺和分离效果的探索仍然欠缺,同时适用于实际应用的大面积超离子导体制备工艺尚不完善。针对以上问题,研究利用聚四氟乙烯(PTFE)作为黏结剂,提出干法工艺高效制备大面积Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)型锂超离子导体薄片,并将其应用于锂同位素分离。结果表明,利用该方法烧结制备的LATP薄片在电渗析分离锂同位素实验中表现出较高的短时分离系数(最高达1.143)和相对合适的有效富集时间。PTFE的引入及干法制备工艺为LATP薄片的可扩展制备提供了可靠的技术途径,实现了LATP薄片的经济、可靠制备。总体来说,该方法为实现高效、环保的锂同位素分离提供了新的思路和技术途径,值得进一步研究探索以明晰其基础科学问题和产业应用前景。
Controlled nuclear fusion is considered to be the ultimate energy source for mankind,and the supply of clean,economical and efficient lithium isotopes,especially 6Li core fuel,is of strategic importance to the development of nuclear fusion.However,the existing lithium isotope separation methods suffers from problems such as limited separation factor and serious environmental pollution,which make it difficult to meet the huge demand for lithium isotopes in the future.Lithium superionic conductors have shown potential for lithium isotope separation applications,but the exploration of their separation process and separation effect is still lacking,while the preparation process of large-area superionic conductors suitable for practical applications is still imperfect.To address the above problems,this study proposes a dry process to efficiently prepare large-area Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)-type lithium superionic conductor sheets by utilizing polytetrafluoroethylene(PTFE)as a binder,and apply them to lithium isotope separation.The results show that the LATP flakes prepared by sintering using this method exhibit high short-time separation coefficients(up to 1.143)and relatively suitable effective enrichment times in electrodialysis separation of lithium isotopes experiments.The introduction of PTFE and the dry preparation process provide a reliable technological pathway for the scalable preparation of LATP flakes,which realizes the economical and reliable preparation of LATP flakes.Overall,this method provides a new idea and technical pathway for realizing efficient and environmentally friendly lithium isotope separation,which is worthy of further research and exploration to clarify its basic scientific issues and industrial application prospects.
作者
卢昌彦
肖楠
李炳勤
刘丝靓
卢洋
蒋良兴
刘芳洋
张宗良
LU Changyan;XIAO Nan;LI Bingqin;LIU Siliang;LU Yang;JIANG Liangxing;LIU Fangyang;ZHANG Zongliang(School of Metallurgy and Environment,Central South University,Changsha,410083,China;Engineering Research Centre of Advanced Battery Materials,Ministry of Education,Changsha,410083,China;National Energy Metal Resources and New Materials Key Laboratory,Changsha,410083,China;Hunan Provincial Key Laboratory of Nonferrous Value-added Metallurgy,Changsha,410083,China)
出处
《盐湖研究》
2025年第4期26-33,共8页
Journal of Salt Lake Research
基金
国家自然科学基金项目(52304376)
湖南省重点研发项目(2023GK2016)
国家重点研发计划项目(2023YFC2909100)。
