Precious metal element@nitrogen-doped carbon hollow sphere material, lithium metal negative electrode active material, lithium metal negative electrode and its preparation and application
A metal negative electrode and active material technology, applied in the direction of active material electrodes, negative electrodes, battery electrodes, etc., can solve the problems of uneven deposition, poor electrical performance and cycle performance, and achieve uniform deposition, excellent electrical conductivity, and increased specific surface area. Effect
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Embodiment 1
[0098] SiO with an average diameter of 500 nm 2 The ball is configured into a sol of 10g / L, using tin protochloride solutions with a concentration of 0.03 and 0.1mol / L, SiO 2 The volume ratio of the sol to the tin protochloride solution is 1:2, activate at room temperature for 3 hours, filter with suction, rinse with deionized water and disperse in 100ml of deionized water, add 100ml of 0.01mol / LAgNO 3 Solution, add ammonia solution dropwise to make silver ammonia solution, then add 50ml 0.01mol / L glucose solution dropwise and stir in water bath at 50°C for 2h to prepare SiO 2 @Ag template. SiO 2 After the @Ag template was cleaned, take 0.5g into 50ml of water, add 0.25g of dopamine, 0.25g of trihydroxyaminomethane, pH 8.5, and stir at room temperature for 24 hours to obtain a double lithium-philic hollow carbon skeleton precursor. Then, under high-purity argon, the temperature was raised to 400°C at 5°C / min, and to 800°C at 1°C / min, and fired for 3 hours. Finally, stir in...
Embodiment 2
[0106] SiO with an average diameter of 500 nm 2 The ball is configured into a 10g / L sol, using a tin protochloride solution with a concentration of 0.05mol / L, SiO 2 The volume ratio of the sol to the stannous chloride solution was 1:2, and activated at room temperature for 3 hours, filtered with suction, rinsed with deionized water, dispersed in 100ml of deionized water, and added 100ml of 0.005mol / L and 0.025mol / LAgNO respectively 3 Solution, add ammonia solution dropwise to prepare silver ammonia solution, then add 125ml 0.01mol / L glucose solution dropwise and stir in water bath at 50°C for 2h to prepare SiO 2 @Ag template. SiO 2 After the @Ag template is cleaned, take 0.5g into 50ml of water, add 0.25g of dopamine, 0.25g of trihydroxyaminomethane, pH is 8.5, and stir at room temperature for 24 hours to obtain nano-silver simple substance @nitrogen-doped carbon hollow sphere precursor. Then, under high-purity argon, the temperature was raised to 400°C at 5°C / min, and to 8...
Embodiment 3
[0114] SiO with an average diameter of 500 nm 2 The ball is configured into a 10g / L sol, using a tin protochloride solution with a concentration of 0.05mol / L, SiO 2 The volume ratio of the sol to the stannous chloride solution is 1:2, activate at room temperature for 3 hours, filter with suction, rinse with deionized water and disperse in 100ml of deionized water, add 100ml of 0.01mol / LAgNO 3 Solution, add ammonia solution dropwise to prepare silver ammonia solution, then add 50ml 0.01mol / L glucose solution dropwise and stir in water bath at 50°C for 2h to prepare SiO 2 @Ag template. SiO 2 After the @Ag template is cleaned, take 0.5g in 50ml water, add 0.25g and 0.5g dopamine respectively, and prepare 5g / L and 10g / L solutions, then add 0.25g and 0.5g trishydroxyaminomethane respectively, the pH is 8.5, Stirring at room temperature for 24 hours to obtain nano-silver simple substance @nitrogen-doped carbon hollow sphere precursor. Then, under high-purity argon, the temperatu...
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