氮化锂对金属锂制备硫化锂改性研究  

Modification of Lithium Sulfide Prepared with Lithium Metal by Lithium Nitride

作　　者：雷振 陈格 徐川 孙家乐 杨柳 田欢 刘杨 LEI Zhen;CHEN Ge;XU Chuan;SUN Jiale;YANG Liu;TIAN Huan;LIU Yang(Tianqi Lithium(Shehong)Co.,Ltd.,Shehong 629200,Sichuan,China;Sichuan Key Laboratory of Lithium Resources and Materials,Shehong 629200,Sichuan,China;Tianqi Xinlong Technology(Chengdu)Co.,Ltd.,Chengdu 610000,Sichuan,China)

机构地区：[1]天齐锂业(射洪)有限公司,四川射洪629200 [2]锂资源与锂材料四川省重点实验室,四川射洪629200 [3]天齐鑫隆科技(成都)有限公司,四川成都610000

出　　处：《矿冶工程》2024年第4期81-83,共3页Mining and Metallurgical Engineering

基　　金：四川省科技计划重点研发项目(2022YFG0124);四川省科技计划苗子工程项目(2023JDRC0071);遂宁市校企合作“揭榜挂帅”项目(2022CDSN-02)。

摘　　要：以金属锂为锂源、硫粉为硫源、氮化锂为添加剂,采用固相法制备了硫化锂。热力学分析结果表明,氮化锂可促进金属锂与硫粉合成硫化锂的反应;Li_(3)N先与硫粉反应释放N_(2),在熔融的金属锂片上形成孔洞,进一步扩大金属锂与硫粉接触面积,得到疏松多孔的骨架结构,有利于后续破碎且减少球磨过程中二次反应的风险。当Li∶S∶Li_(3)N=2∶2∶0.4(物质的量比)时,在100℃下反应8 h即可得到粗品硫化锂,再经700℃煅烧、除杂和球磨后可以得到纯度大于99.95%、粒径小于15μm的电动汽车用硫化锂产品。该方法为工业化生产硫化锂产品提供了新思路。Lithium sulfide was prepared by solid phase syntheses,with lithium metal as the lithium source,sulfur powder as the sulfur source,and lithium nitride as the additive.Thermodynamic analysis results show that lithium nitride can promote the reaction of lithium metal with sulfur powder to synthesize lithium sulfide;Li_(3)N firstly reacts with sulfur powder to release N_(2),leading to holes formed on the molten lithium metal sheet and the contact area between lithium metal and sulfur powder further expanded.Thus a loose and porous skeleton structure is formed,which is conducive to subsequent crushing and can reduce the risk of secondary reactions in the following ball milling process.With Li∶S∶Li_(3)N=2∶2∶0.4(molar ratio),crude lithium sulfide can be obtained after 8 hours reaction at 100℃.It is then subjected to calcination,impurity removal and ball milling processes,and a kind of lithium sulfide products with purity greater than 99.95%and particle size less than 15μm can be obtained,which can be used in EV.This method provides a new idea for industrial production of lithium sulfide products.

关 键 词：固态电池 固态电解质 氮化锂 锂 硫 EV级 

分 类 号：TM912[电气工程—电力电子与电力传动]