Transition metal sulfide coated with carbon, preparation method and application
A transition metal and surface coating technology, applied in the field of transition metal sulfides, can solve problems such as battery short circuit and current collector corrosion, and achieve the effects of high battery capacity, good conductivity and good cycle stability
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[0054] Example 1:
[0055] Dissolve 1g of CuS in 50mL of water, add 2g of glucose, transfer to a 100mL hydrothermal kettle, react for 24h, and calcinate at 500℃ for 10h. Obtain the surface carbon-coated sulfur copper compound, mix 0.5 g of the prepared surface carbon-coated sulfur copper compound with 0.1071 g acetylene black and 0.1071 g polyvinylidene fluoride (PVDF), and add an appropriate amount of N-methylpyrrolidone ( NMP) is dissolved, and the slurry is coated on a copper current collector to prepare an electrode. The test electrode was dried in a vacuum oven at 60°C for 12 hours, and the battery was assembled in a high-purity argon atmosphere glove box. The electrolyte is 1mol lithium bis(trifluoromethyl)sulfonylimide (LiTFSI) salt, and the solvent is 1,2-dimethoxyethane (DME) and 1,3-dioxide in a volume ratio of 1:1 The mixed solution of pentanol (DOL) has a lithium salt concentration of 1 mol / L. Using glass fiber filter paper as the liquid-absorbing membrane, Celgard...
Example Embodiment
[0057] Example 2:
[0058] Dissolve 1g of CuS in 50mL of water, add 1.5g of glucose, transfer to a 100mL hydrothermal kettle, react for 24h, and calcinate at 500°C for 10h. Obtain the surface carbon-coated sulfur copper compound, mix 0.5 g of the prepared surface carbon-coated sulfur copper compound with 0.1071 g acetylene black and 0.1071 g polyvinylidene fluoride (PVDF), and add an appropriate amount of N-methylpyrrolidone ( NMP) is dissolved, and the slurry is coated on a copper current collector to prepare an electrode. The test electrode was dried in a vacuum oven at 60° C. for 12 hours, and the battery was assembled in a glove box with a high-purity argon atmosphere. The electrolyte is 1mol lithium bis(trifluoromethyl)sulfonylimide (LiTFSI) salt, and the solvent is 1,2-dimethoxyethane (DME) and 1,3-dioxide in a volume ratio of 1:1 The mixed solution of pentanic ring (DOL) has a lithium salt concentration of 1 mol / L. Using glass fiber filter paper as the liquid-absorbing ...
Example Embodiment
[0060] Example 3:
[0061] Dissolve 1g of CuS in 50mL of water, add 1g of glucose, transfer to a 100mL hydrothermal kettle, react for 24h, and calcinate at 500℃ for 10h. Obtain the surface carbon-coated sulfur copper compound, mix 0.5 g of the prepared surface carbon-coated sulfur copper compound with 0.1071 g acetylene black and 0.1071 g polyvinylidene fluoride (PVDF), and add an appropriate amount of N-methylpyrrolidone ( NMP) is dissolved, and the slurry is coated on a copper current collector to prepare an electrode. The test electrode was dried in a vacuum oven at 60°C for 12 hours, and the battery was assembled in a high-purity argon atmosphere glove box. The electrolyte is 1mol lithium bis(trifluoromethyl)sulfonylimide (LiTFSI) salt, and the solvent is 1,2-dimethoxyethane (DME) and 1,3-dioxide in a volume ratio of 1:1 The mixed solution of pentanol (DOL) has a lithium salt concentration of 1 mol / L. Using glass fiber filter paper as the liquid-absorbing membrane, Celgard...
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