Composite nano material for high performance lithium ion battery and preparation method thereof
A technology of composite nanomaterials and lithium-ion batteries, applied in nanotechnology for materials and surface science, battery electrodes, nanotechnology, etc., can solve problems such as unsatisfactory charge and discharge performance, limited electron transfer speed and conductivity , to achieve the effect of improving anti-overcharge performance, good and stable cycle performance, and increasing discharge capacity
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Embodiment 1
[0025] A kind of preparation method of composite nano material for high-performance lithium ion battery, its preparation method comprises the steps:
[0026] (1) SnO 2 / Carbon composite material preparation: first, weigh 8g of SnCl 4 ·5H 2 O joins the preparation solution A in the mixed solvent of dehydrated alcohol and water of 40ml; Add carbon source glucose then in solution A, form uniform and stable solution for subsequent use, the add-on of described carbon source is 15g, then the formed Add the mixed solution into the reactor and add a certain amount of 0.5mol / L NaOH solution into the reactor, then place the reactor in a homogeneous reactor for heat treatment, the heat treatment conditions are: temperature 180°C, time 12 After that, the product was washed, dried, and baked at 450°C for 4 hours under an inert atmosphere to obtain SnO 2 / carbon material;
[0027] (2)V 2 o 5 / Preparation of graphene composite material: get 5g vanadium oxide V0 2 Add it into 30mL of...
Embodiment 2
[0031] A kind of preparation method of composite nano material for high-performance lithium ion battery, its preparation method comprises the steps:
[0032] (1) SnO 2 / Preparation of carbon composite material: first, weigh 12g of SnCl 4 ·5H 2 O joins the preparation solution A in the mixed solvent of dehydrated alcohol and water of 60ml; Add carbon source sucrose then in solution A, form the uniform stable solution for subsequent use, the add-on of described carbon source is 80g, then form The mixed solution was added to the reactor and a certain amount of 0.5mol / L NaOH solution was added to the reactor, and then the reactor was placed in a homogeneous reactor for heat treatment. The heat treatment conditions were: temperature 200°C, time 24 After that, the product was washed, dried, and baked at 550°C for 2 to 10 hours under an inert atmosphere to obtain SnO 2 / carbon material;
[0033] (2)V 2 o 5 / Preparation of graphene composite material: get 10g vanadium oxide V ...
Embodiment 3
[0037] A kind of preparation method of composite nano material for high-performance lithium ion battery, its preparation method comprises the steps:
[0038] (1) SnO 2 / Carbon composite material preparation: first, weigh 10g of SnCl 4 ·5H 2 O joins the preparation solution A in the mixed solvent of dehydrated alcohol and water of 50ml; Then in solution A, add carbon source phenolic resin, form uniform and stable solution for subsequent use, the add-on of described carbon source is 45g, then form The mixed solution of the reaction kettle was added into the reaction kettle and a certain amount of 0.5mol / L NaOH solution was added to the reaction kettle, and then the reaction kettle was placed in a homogeneous reactor for heat treatment. The heat treatment conditions were: temperature 190°C, time: 18 hours; then the product was washed, dried, and baked at 500°C for 6 hours under an inert atmosphere to obtain SnO 2 / carbon material;
[0039] (2)V 2 o 5 / Preparation of graph...
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