Preparation method of graphene/titanium dioxide composite material for lithium ion battery cathode material
A lithium-ion battery, titanium dioxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as difficulty in practical application of metal oxide anode materials, loss of electrical contact between ions, mechanical stability attenuation, etc., to enhance the cycle. Reversible lithium storage capacity, large electrochemical lithium storage capacity, and the effect of relieving large volume expansion
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[0016] Example 1
[0017] A preparation method of graphene / titanium dioxide composite material for lithium ion battery anode material, including the following steps:
[0018] a. Preparation of graphite oxide nanosheets
[0019] Dissolve a certain amount of potassium persulfate and phosphorus pentoxide in concentrated sulfuric acid, add a certain amount of natural graphite after heating to 80°C, keep it at 80°C for 4.5 hours and then cool to room temperature; then dilute with deionized water and place Overnight; then filtered and washed, the resulting filter residue was dried in a vacuum drying oven at 60°C; the dried filter residue was dissolved in concentrated sulfuric acid, and potassium permanganate was slowly added under ice bath conditions, and stirred at 35°C for 2h ; Then dilute with deionized water, and slowly add 30% hydrogen peroxide; filter and wash; disperse the washed product in deionized water, and ultrasonically peel to obtain graphite oxide nanosheets, which are cent...
Example Embodiment
[0025] Example 2
[0026] A preparation method of graphene / titanium dioxide composite material for lithium ion battery anode material, including the following steps:
[0027] a. Preparation of graphite oxide nanosheets
[0028] Dissolve a certain amount of potassium persulfate and phosphorus pentoxide in concentrated sulfuric acid, add a certain amount of natural graphite after heating to 80°C, keep it at 80°C for 4.5 hours and then cool to room temperature; then dilute with deionized water and place Overnight; then filtered and washed, the resulting filter residue was dried in a vacuum drying oven at 60°C; the dried filter residue was dissolved in concentrated sulfuric acid, and potassium permanganate was slowly added under ice bath conditions, and stirred at 35°C for 2h ; Then dilute with deionized water, and slowly add 30% hydrogen peroxide; filter and wash; disperse the washed product in deionized water, and ultrasonically peel to obtain graphite oxide nanosheets, which are cent...
Example Embodiment
[0034] Example 3
[0035] A preparation method of graphene / titanium dioxide composite material for lithium ion battery anode material, including the following steps:
[0036] a. Preparation of graphite oxide nanosheets
[0037] Dissolve a certain amount of potassium persulfate and phosphorus pentoxide in concentrated sulfuric acid, add a certain amount of natural graphite after heating to 80°C, keep it at 80°C for 4.5 hours and then cool to room temperature; then dilute with deionized water and place Overnight; then filtered and washed, the resulting filter residue was dried in a vacuum drying oven at 60°C; the dried filter residue was dissolved in concentrated sulfuric acid, and potassium permanganate was slowly added under ice bath conditions, and stirred at 35°C for 2h ; Then dilute with deionized water, and slowly add 30% hydrogen peroxide; filter and wash; disperse the washed product in deionized water, and ultrasonically peel to obtain graphite oxide nanosheets, which are cent...
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