A kind of cobalt gluconate coordination polymer as the application of lithium-ion battery negative electrode material
A technology of coordination polymer and glucaric acid, applied in battery electrodes, secondary batteries, circuits, etc., to achieve the effect of high discharge specific capacity and good cycle stability
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Embodiment 1
[0015] Mix and dissolve cobalt acetate tetrahydrate and potassium gluconate in a molar ratio of 1:1 in deionized water, stir at 50°C for 10 hours, slowly cool to room temperature, filter, and leave the filtrate at room temperature for 2 weeks to precipitate magenta blocks cobalt glucarate coordination polymer crystal: [Co 2 (C 6 h 8 o 8 ) 2 (H 2 O) 2 ] 2 2H 2 O. The crystals were washed with ethanol, and placed in an oven at 20°C for 12 hours under vacuum. Yield 30%.
[0016] Cobalt glucarate coordination polymer: [Co 2 (C 6 h 8 o 8 ) 2 (H 2 O) 2 ] 2 2H 2 The application of O as a negative electrode material for lithium-ion batteries:
[0017] Grind the cobalt gluconate coordination polymer crystals to 200 mesh powder, then mix the cobalt glucarate coordination polymer powder with acetylene black and polyvinylidene fluoride at a mass ratio of 1.0:0.1:0.05, and add N- Methylpyrrolidone, stirred to form negative electrode slurry, the resulting negative electr...
Embodiment 2
[0019] Mix and dissolve cobalt acetate tetrahydrate and potassium gluconate in a molar ratio of 1:4 in deionized water, stir at 95°C for 1 hour, slowly cool to room temperature, filter, and leave the filtrate at room temperature for 2 weeks to precipitate a magenta block cobalt glucarate coordination polymer crystal: [Co 2 (C 6 h 8 o 8 ) 2 (H 2 O) 2 ] 2 2H 2 O. The crystals were washed with ethanol, and placed in an oven at 40°C for 2 h under vacuum. Yield 47%.
[0020] Cobalt glucarate coordination polymer: [Co 2 (C 6 h 8 o 8 ) 2 (H 2 O) 2 ] 2 2H 2 The application of O as a negative electrode material for lithium-ion batteries:
[0021] Grind cobalt glucarate coordination polymer crystals to 500 mesh powder, then mix cobalt glucarate coordination polymer powder with acetylene black and polyvinylidene fluoride at a mass ratio of 1.0:2.0:0.05, add N- Methylpyrrolidone, stirred to form negative electrode slurry, the resulting negative electrode slurry is coat...
Embodiment 3
[0023] Mix and dissolve cobalt acetate tetrahydrate and potassium gluconate in a molar ratio of 1:1 in deionized water, stir at 85°C for 2 hours, slowly cool to room temperature, filter, and leave the filtrate at room temperature for 2 weeks to precipitate a magenta block cobalt glucarate coordination polymer crystal: [Co 2 (C 6 h 8 o 8 ) 2 (H 2 O) 2 ] 2 2H 2 O. The crystals were washed with ethanol, and placed in an oven at 20°C for 12 hours under vacuum. Yield 50%.
[0024] Cobalt glucarate coordination polymer: [Co 2 (C 6 h 8 o 8 ) 2 (H 2 O) 2 ] 2 2H 2 The application of O as a negative electrode material for lithium-ion batteries:
[0025] Grind the cobalt gluconate coordination polymer crystal to 300 mesh powder, then mix the cobalt glucarate coordination polymer powder with acetylene black and polyvinylidene fluoride at a mass ratio of 1.0:0.2:0.2, and add N- Methylpyrrolidone, stirred to form negative electrode slurry, and the resulting negative elec...
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