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1.发明公开公开(公告)号：US20230365408A1
公开(公告)日：2023-11-16
申请号：US18025914
申请日：2022-02-21
发明人： Liangbin LI , Cui LIAO , Ming YE , Zhihua HU , Zhifang PAN , Bin HU , Jianyong ZHANG , Zhong HU , Maonv LIAO
CPC分类号： C01B17/28 , C01B17/36 , C01B17/38 , C01P2006/82
摘要： A method for preparing high-purity lithium sulfide by using industrial-grade butyllithium includes the following steps: step A: under an inert gas condition, thoroughly mixing 1.5-2.5 g of lithium chloride, 0.5 L of an industrial-grade n-butyllithium solution (2.5 mol/L) and 1.5-2.5 L of n-hexane to obtain a mixed solution, and charging the mixed solution into a sealed container; step B: under the sealed condition, firstly introducing H2S gas into a gas-washing bottle through a submerged pipe at a rate of 10.5 L/h, then introducing into the mixed solution through the submerged pipe, controlling the reaction temperature at 25-40° C., and continuously stirring for reaction for 4-6 h to obtain a reaction slurry; and step C: under an inert gas condition, filtering the reaction slurry with a G3 sand core funnel to obtain a crude lithium sulfide solid wet material.
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公开(公告)号：US20230365407A1
公开(公告)日：2023-11-16
申请号：US18025912
申请日：2022-02-21
发明人： Liangbin LI , Cui LIAO , Zhifang PAN , Ming YE , Zhihua HU , Jianyong ZHANG , Bin HU , Maonv LIAO , Zhong HU , Xiaokang LIU
IPC分类号： C01B17/22 , H01M10/0562
CPC分类号： C01B17/22 , H01M10/0562 , H01M2300/0068
摘要： A method for preparing lithium sulfide by using metallic lithium includes: step A: placing 0.05-0.1 kg of metallic lithium and a corresponding sulfur powder into a 5-10 L sealed container under an inert condition according to a mass ratio of 1:0.8-1:1; step B: placing the sealed container charged with lithium and the sulfur powder in step A into a vacuum oven at 250-300° C. and holding for 2-3 h, then adding an equal amount of sulfur as in step A followed by heat preservation for 2-3 h, and finally adding an equal amount of sulfur as in step A followed by heat preservation for 2-3 h; and step C: placing a crude lithium sulfide product obtained after high-temperature firing into a sealed ball-milling tank, and performing ball-milling at room temperature at a rotation speed of 100-500 r/min for 12-24 h.
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