A composite solid electrolyte with high ionic conductivity and a preparation method thereof
A solid electrolyte and ionic conductivity technology, applied in solid electrolytes, non-aqueous electrolytes, circuits, etc., can solve the problem of low ionic conductivity, achieve the effects of improving ionic conductivity, fast transmission, and reducing room temperature ionic conductivity
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Embodiment 1
[0029] Step 1: Prepare orderly oriented LLTO inorganic solid electrolyte nanofibers by electrospinning method and perform high-temperature calcination at 600° C. for 3 hours to obtain well-crystallized nanofibers. Compared with randomly oriented nanofibers, ordered oriented nanofibers are more conducive to achieving a high degree of orientation of nanofibers inside the inorganic electrolyte framework, shortening the Li + The path of transport obtains a solid electrolyte with high ionic conductivity. Electrospinning conditions can be adjusted according to different raw materials.
[0030]Step 2: Evenly disperse the inorganic solid electrolyte nanofibers in water, and then arrange the inorganic solid electrolyte fibers in a direction perpendicular to the substrate by freeze casting, and freeze-dry to form an inorganic solid electrolyte framework that is highly oriented at 90° to the substrate 1. A few nanofibers that cannot be vertically aligned form bridges between vertically...
Embodiment 2
[0035] Step 1: Prepare orderly oriented LTAP inorganic solid electrolyte nanofibers by electrospinning method and perform high-temperature calcination at 900° C. for 1 h to obtain well-crystallized nanofibers. Compared with randomly oriented nanofibers, ordered oriented nanofibers are more conducive to achieving a high degree of orientation of nanofibers inside the inorganic electrolyte framework, shortening the Li + The path of transport obtains a solid electrolyte with high ionic conductivity. Electrospinning conditions can be adjusted according to different raw materials.
[0036] Step 2: Evenly disperse the inorganic solid electrolyte nanofibers in water, and then arrange the inorganic solid electrolyte fibers in a direction perpendicular to the substrate by freeze casting, and freeze-dry to form an inorganic solid electrolyte framework that is highly oriented at 90° to the substrate . A few nanofibers that cannot be vertically aligned form bridges between vertically ali...
Embodiment 3
[0041] Step 1: Prepare randomly oriented LISICON inorganic solid electrolyte nanofibers by electrospinning and perform high-temperature calcination at a temperature of 800°C for 2 hours to obtain well-crystallized nanofibers. Electrospinning conditions can be adjusted according to different raw materials.
[0042] Step 2: Evenly disperse the inorganic solid electrolyte nanofibers in water, and then arrange the inorganic solid electrolyte fibers in a direction perpendicular to the substrate by freeze casting, and freeze-dry to form an inorganic solid electrolyte framework that is highly oriented at 90° to the substrate . A few nanofibers that cannot be vertically aligned form bridges between vertically aligned fibers or fiber clusters.
[0043] Step 3: Using tetrahydrofuran as solvent, polycarbonate and LiPF 6 Mix well to prepare a homogeneous solution. Pouring the above prepared solution on the inorganic solid electrolyte framework obtained in step 2, the inorganic solid el...
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