A kind of foamed copper-based lithium ion battery negative electrode material and preparation method thereof
A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of poor performance of lithium-ion batteries, high surface resistance of negative electrode materials, low conductivity, etc., and achieve strong redox Effects of chemical kinetics, low activation energy, and high conductivity
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[0022] A preparation method for a foamed copper-based lithium-ion battery negative electrode material, comprising the following steps:
[0023] 1) Pretreatment of foamed copper: first soak the foamed copper with acetone and hydrochloric acid respectively, then clean the foamed copper with ethanol and water respectively;
[0024] 2) Preparation of Cu-MOF / copper foam: Dissolve copper salt and 1,4-phthalic acid in DMF, add the copper foam treated in step 1), react at 100-120°C for 40-60 hours, centrifuge, and The solid product is washed and dried to obtain Cu-MOF / copper foam;
[0025] 3) Calcination treatment of Cu-MOF / copper foam: put Cu-MOF / copper foam in a tube furnace, raise the temperature to 550-650°C at a rate of 2-4°C / min, and calcinate in a nitrogen atmosphere for 4-6 hours, and then lowered to room temperature at a cooling rate of 4-6°C / min to obtain CuO-Cu 2 O-C / CF, that is, copper foam-based lithium-ion battery anode material.
[0026] Preferably, the molar ratio o...
Embodiment 1
[0034] A preparation method for a foamed copper-based lithium-ion battery negative electrode material, comprising the following steps:
[0035] 1) Pretreatment of foamed copper: Take foamed copper with a specification of 30mm×30mm×0.5mm, first soak it in acetone and hydrochloric acid, then cut the foamed copper to 15mm×15mm×0.5mm, and then wash it with ethanol and water respectively copper foam;
[0036] 2) Preparation of Cu-MOF / copper foam: 2.4g of Cu(NO 3 ) 2 ·3H 2 O and 0.44g of 1,4-phthalic acid were dissolved in 60mL of DMF, added to the copper foam treated in step 1), ultrasonically dispersed for 45 minutes, reacted at 110°C for 48 hours, centrifuged at 4000rpm for 5 minutes, and washed the solid product with DMF Wash and dry at 60°C for 24 hours to obtain Cu-MOF / copper foam;
[0037] 3) Calcination of Cu-MOF / copper foam: put Cu-MOF / copper foam in a tube furnace, raise the temperature to 600°C at a rate of 3°C / min, calcinate in a nitrogen atmosphere for 5 hours, and ...
Embodiment 2
[0051] A preparation method for a foamed copper-based lithium-ion battery negative electrode material, comprising the following steps:
[0052] 1) Pretreatment of foamed copper: Take foamed copper with a specification of 30mm×30mm×0.5mm, first soak it in acetone and hydrochloric acid, then cut the foamed copper to 15mm×15mm×0.5mm, and then wash it with ethanol and water respectively copper foam;
[0053] 2) Preparation of Cu-MOF / copper foam: 2.0g of CuCl 2 Dissolve 0.43g of 1,4-phthalic acid in 90mL of DMF, add the copper foam treated in step 1), ultrasonically disperse for 45 minutes, react at 100°C for 50 hours, centrifuge at 4000rpm for 5 minutes, and wash the solid product with DMF. Washing and drying at 60°C for 24 hours to obtain Cu-MOF / copper foam;
[0054] 3) Calcination treatment of Cu-MOF / copper foam: put Cu-MOF / copper foam in a tube furnace, raise the temperature to 550°C at a rate of 3°C / min, calcinate in a nitrogen atmosphere for 6 hours, and then heat it at 5°C...
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