Lithium-philic heteroatom and metal oxide co-doped three-dimensional fiber frame lithium battery negative electrode and preparation
A technology of heteroatoms and oxides, applied in the field of energy storage devices, can solve problems such as lithium dendrite growth, and achieve the effect of avoiding lithium dendrites and improving long-cycle stability and safety.
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[0035] (1) Preparation of stable and safe lithium anode
[0036] Accurately weigh out 5.0g of gelatin and dissolve it in 45.0g of solvent (the mass ratio of water to trifluoroethanol is 1:1), then divide the solvent into two parts, and add 0.356g of acetic acid dihydrate to one part. Zinc, add 0.136g lithium hydroxide monohydrate to the other portion, and after stirring uniformly, add the solution containing lithium hydroxide monohydrate to the solution containing zinc acetate dihydrate dropwise and stir while adding dropwise. The total reaction time is half an hour. Afterwards, it is spun into a fiber film on copper foil using an electrospinning machine (the film thickness is 0.02mm). The technical parameters of electrospinning in step (2) are: advancement amount 0.01mL / min, translation speed 0.08cm / min . Let it stand at room temperature for 24 hours.
[0037] The above modified copper foil is heated in a tube furnace filled with nitrogen. The temperature range of the heating pr...
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