Preparation method of dodecahedral porous co3znc/c composite and its application in lithium-ion batteries
A dodecahedron and composite material technology, applied in the field of new energy materials, can solve problems such as harsh conditions, poor performance, and complicated preparation process, and achieve good stability, uniform shape, and good repeatability
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Embodiment 1
[0058] According to the molar ratio of cobalt source and zinc source is 2: 1, get 3g polyvinylpyrrolidone and 20mmol cobalt nitrate, 10mmol zinc nitrate, be dissolved in 200ml methanol to form a solution (dispersion liquid), 160mmol 2-methylimidazole is dissolved in 200ml methanol, The latter was quickly added to the former and fully stirred for 1 hour, and purified at room temperature for 24 hours, resulting in a purple precipitate. The product was washed with methanol, dried in an oven, placed in a quartz crucible, and argon was introduced at 600 ° C. High temperature heat treatment, time is 8h, can get dodecahedral porous Co 3 ZnC / C composites.
[0059] The dodecahedral porous Co prepared by this embodiment 3 ZnC / C composites, Co 3 ZnC / C composite nano-particles are constructed to form a uniform dodecahedral structure rich in pores, and the particle size is 150-250nm. The specific surface area is 745m 2 / g.
[0060] The lithium-ion battery composite anode material prep...
Embodiment 2
[0066] According to the molar ratio of cobalt source and zinc source is 1: 1, get 3g polyvinylpyrrolidone and 10mmol cobalt nitrate, 10mmol zinc nitrate, be dissolved in 200ml methanol to form a solution (dispersion liquid), 80mmol 2-methylimidazole is dissolved in 200ml methanol, The latter was quickly added to the former and fully stirred for 1 hour, and purified at room temperature for 24 hours, resulting in a purple precipitate. The product was washed with methanol, dried in an oven, placed in a quartz crucible, and argon was introduced at 600 ° C. High temperature heat treatment, time is 6h, can get dodecahedral porous Co 3 ZnC / C composites.
[0067] The dodecahedral porous Co prepared by this embodiment 3 ZnC / C composites, Co 3 ZnC / C composite nano-particles are constructed to form a uniform dodecahedral structure rich in pores, and the particle size is 150-250nm. The specific surface area is 680m 2 / g.
[0068] Dodecahedral porous Co 3 When the electrode made of Z...
Embodiment 3
[0070] According to the molar ratio of cobalt source and zinc source is 1:1, take 2.0g polyvinylpyrrolidone and 10mmol cobalt nitrate, 10mmol zinc nitrate, dissolve in 200ml methanol to form a solution (dispersion), 160mmol 2-methylimidazole is dissolved in 200ml methanol , quickly add the latter to the former and fully stir for 1 hour, stand and purify at room temperature for 24 hours, a purple precipitate is produced, wash the product with methanol, dry it in an oven, place it in a quartz crucible, and pass in argon gas at 650°C Perform high temperature heat treatment for 8 hours to obtain dodecahedral porous Co 3 ZnC / C composites.
[0071] The dodecahedral porous Co prepared by this embodiment 3 ZnC / C composites, Co 3 ZnC / C composite nanoparticles are constructed to form a uniform dodecahedral structure rich in pores, and the particle size is 300-400nm. The specific surface area is 720m 2 / g.
[0072] Dodecahedral porous Co 3 The electrode made of ZnC / C composite mater...
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