Process method for synthesizing tin disulfide nanosheet by taking nitrogen-doped multi-walled carbon nanotube as carrier
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A technology of multi-walled carbon nanotubes and tin disulfide, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as unsatisfactory needs
Inactive Publication Date: 2021-06-11
海宏(唐河)新能源科技有限公司
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Despite long cycle life, these materials cannot meet the dema
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Embodiment 1
[0033] A process method for synthesizing tin disulfide nanosheets with nitrogen-doped multi-walled carbon nanotubes as a carrier, which is realized by the following steps:
[0034] 1) Synthesis of ordered mesoporous carbon CMK-3 by incipient wetness of silica SBA-15 and treatment with nitrogen-containing precursors to obtain N-MWCNTS, nitrogen-doped multi-walled carbon nanotubes;
[0035] 2) Dissolve 100mg of polystyrene sulfonic acid pss in 50mL of sodium chloride solution dispersion under stirring and keep for 30 minutes;
[0036] 3) 100 mg of N-MWCNTS was added to the mixture obtained in step 2), and the resulting solution was subjected to intense sonication for 30 minutes, followed by stirring for two hours;
[0037] 4) After the solution obtained in step 3) was washed several times with distilled water and ethanol, the precipitate was collected by centrifugation, and finally the precipitate was dried at 60 °C for 8 h to obtain pss-N-MWCNTS.
[0038] 5) Dissolve 0.4 g of ...
Embodiment 2
[0043] A process method for synthesizing tin disulfide nanosheets with nitrogen-doped multi-walled carbon nanotubes as a carrier, which is realized by the following steps:
[0044] 1) Synthesis of ordered mesoporous carbon CMK-3 by incipient wetness of silica SBA-15 and treatment with nitrogen-containing precursors to obtain N-MWCNTS, nitrogen-doped multi-walled carbon nanotubes;
[0045] 2) Dissolve 100mg of polystyrene sulfonic acid pss in 50mL of sodium chloride solution dispersion under stirring and keep for 30 minutes;
[0046] 3) 100 mg of N-MWCNTS was added to the mixture obtained in step 2), and the resulting solution was subjected to intense sonication for 30 minutes, followed by stirring for two hours;
[0047] 4) After the solution obtained in step 3) was washed several times with distilled water and ethanol, the precipitate was collected by centrifugation, and finally the precipitate was dried at 60 °C for 8 h to obtain pss-N-MWCNTS.
[0048] 5) Dissolve 0.8 g of ...
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Abstract
The invention discloses a process method for synthesizing a tin disulfide nanosheet by taking a nitrogen-doped multi-walled carbon nanotube as a carrier, and the method comprises the following steps: synthesizing ordered mesoporous carbon CMK-3 through an initial wet method of silicon dioxide SBA-15, and treating with a nitrogen-containing precursor to obtain N-MWCNTS, namely the nitrogen-doped multi-walled carbon nanotube; dissolving 100mg of polystyrolsulfon acid (pss) in 50mL of sodium chloride solution (1M) dispersion in a stirring state, and keeping the state for 30 minutes; adding 100 mg of N-MWCNTS into the mixture obtained in the step 2), carrying out intense ultrasonic treatment on the obtained solution for 30 minutes, and then performing stirring for 2 hours; collecting a synthetic product through a centrifugal method, washing the synthetic product with ethanol for multiple times, and drying the washed product in a vacuum oven to obtain SnS 2@N-MWCNTS, namely the tin disulfide nanosheet synthesized by taking the nitrogen-doped multi-walled carbon nanotube as the carrier. According to the nitrogen-doped multi-walled carbon nanotube composite material, the mesoporous characteristic of the nitrogen-doped multi-walled carbon nanotube is effectively maintained, and the synergistic effect between tin disulfide and the ordered carbon material is enhanced, so the retention capacity of the circulation capacity is enhanced.
Description
technical field [0001] The invention relates to the technical field of lithium battery manufacturing, in particular to a process method for synthesizing tin disulfide nanosheets with nitrogen-doped multi-walled carbon nanotubes as a carrier. Background technique [0002] Lithium-ion batteries (LIBs) are bringing great changes to modern life and are widely used in portable electronic devices due to their high energy density and long cycle life. However, the performance of lithium-ion batteries is far from meeting the needs of the massively growing electric vehicle market. Commercial graphite as a cathode material has a low theoretical capacity of 372 mA h g-1, which limits the large-scale implementation of commercial graphite in the development of high-energy-density lithium-ion batteries. Therefore, researchers have made great efforts to find alternative cathode materials with high specific capacity and power density. [0003] Among the available cathode materials, tin dis...
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