Composite positive electrode for solid-state lithium battery and preparation method and application thereof
A composite positive electrode and solid-state lithium technology, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of low active material loading, discontinuous ion/electronic conduction, poor contact, etc., and increase the interface contact area , Improve interface contact, reduce the effect of battery polarization
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Embodiment 1
[0073] Embodiment 1: The preparation method of the composite positive electrode for solid-state lithium battery of this embodiment is carried out according to the following steps:
[0074] 1. Will comply with LiNi 0.5 co 0.2 mn 0.3 o 2 The stoichiometric ratio of Ni(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O, Mn(CH 3 COO) 2 4H 2 O and LiNO 3 Dissolve in N, N-dimethylformamide, stir at room temperature for 2 hours to form a uniform solution; add polyvinylpyrrolidone to the above solution and continue to stir for 8 hours to obtain a uniform and viscous electrospinning precursor; the polyethylene The amount of pyrrolidone added accounts for 12wt% of the total mass of the electrospinning precursor solution;
[0075] 2. Add the electrospinning precursor solution prepared in step 1 into a 5mL syringe, and use a stainless steel flat needle with an inner diameter of 0.51mm as the spinning nozzle, and a nickel mesh as the spinning receiving net, and use an external DC power sup...
Embodiment 2
[0101] Embodiment 2: The preparation method of the composite positive electrode for solid-state lithium battery of this embodiment is carried out according to the following steps:
[0102] 1. Press LiNi 0.5 co 0.2 mn 0.3 o 2 The stoichiometric ratio of Ni(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O, Mn(CH 3 COO) 2 4H 2 O and LiNO 3 Dissolve in N,N-dimethylformamide and stir for 2h; add polyvinylpyrrolidone to the solution and continue to stir for 8h to obtain a uniform and viscous electrospinning precursor solution; wherein the mass of polyvinylpyrrolidone accounts for 12wt% of the total mass of the precursor solution;
[0103] 2. Add the electrospinning precursor solution prepared in step 1 into a 5mL syringe, and use a stainless steel flat needle with an inner diameter of 0.51mm as the spinning nozzle, and a nickel mesh as the spinning receiving net, and use an external DC power supply to form an electrospinning nozzle. The electrostatic field of silk, in which the s...
Embodiment 3
[0118] Embodiment 3: The preparation method of the composite positive electrode for solid-state lithium battery of this embodiment is carried out according to the following steps:
[0119] 1. Press LiNi 0.5 co 0.2 mn 0.3 o 2 The stoichiometric ratio of Ni(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O, Mn(CH 3 COO) 2 4H 2 O and LiNO 3 Dissolve in N,N-dimethylformamide and stir for 2h; add polyvinylpyrrolidone to the above solution and continue to stir for 8h to obtain a uniform and viscous electrospinning precursor solution; wherein the amount of polyvinylpyrrolidone accounted for The total mass of spinning precursor solution is 12wt%;
[0120] 2. Add the electrospinning precursor solution prepared in step 1 into a 5mL syringe, and use a stainless steel flat needle with an inner diameter of 0.51mm as the spinning nozzle, and a nickel mesh as the spinning receiving net, and use an external DC power supply to form an electrospinning nozzle. The electrostatic field of silk, ...
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