High-ion-conductivity sulfide solid electrolyte based on liquid phase method and preparation method thereof
A solid electrolyte, high-ion technology, applied in electrochemical generators, circuits, electrical components, etc., can solve problems such as the reduction of electrical conductivity, and achieve the effect of eliminating grain boundary resistance, improving electrolyte performance, and improving ionic conductivity.
Active Publication Date: 2019-06-14
NINGBO RONBAY LITHIUM BATTERY MATERIAL CO LTD
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The invention discloses a high-ion-conductivity sulfide solid electrolyte based on a liquid phase method and a preparation method thereof. The preparation method comprises the following steps: (1) adding raw materials at least comprising Li2S and P2S5 and a solvent into a stirring container, stirring, performing vacuum filtration, and drying under reduced pressure to obtain a mixture a; (2) filling the mixture a in the step (1) into a ball milling tank, vacuumizing, and performing ball milling to obtain a mixture b; (3) and taking out the mixture b in the step (2) from a glove box, and performing heat treatment under the protection of inert atmosphere to obtain the high-ion-conductivity sulfide solid electrolyte material. According to the invention, the porous structure introduced by solvent and crystallization solvent molecules in the obtained sulfide solid electrolyte is eliminated by secondary ball milling under reduced pressure after drying under reduced pressure, so that the high-ion-conductivity sulfide solid electrolyte is obtained. The invention further adopts a hot pressing or hot paired roller mode for molding, thereby enhancing the combination effect of the sulfide solidelectrolyte and further improving the ionic conductivity.
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Property | Measurement | Unit |
Thickness | 10.0 ~ 100.0 | µm |
Thickness | 30.0 | µm |
Ionic conductivity | 0.0013 | s/cm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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