Lithium-sulfur battery positive electrode material and its preparation method and application
A technology for lithium-sulfur batteries and positive electrode materials, applied in battery electrodes, lithium batteries, positive electrodes, etc., can solve the problem of low initial charge-discharge capacity and rate performance, unsatisfactory cycle stability, and unsatisfactory electrochemical performance of lithium-sulfur batteries. problems, achieve good cycle stability, good wettability and high content of elemental sulfur, and inhibit the effect of shuttling effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0027] On the one hand, an embodiment of the present invention provides a method for preparing a cathode material for a lithium-sulfur battery. The preparation method of the positive electrode material of the lithium-sulfur battery comprises the following steps:
[0028] Step S01. Prepare hollow carbon nanosphere precursor:
[0029] Polymerize pyrrole and aniline in an aqueous solution containing a soft template to obtain a hollow carbon nanosphere precursor;
[0030] Step S02. Carbonizing and activating the hollow carbon nanosphere precursor:
[0031] Washing the precursor of the hollow carbon nanospheres, pulverizing them, and then subjecting them to carbonization and activation with ammonia water to obtain nitrogen-doped hollow carbon nanospheres;
[0032] Step S03. Depositing elemental sulfur on nitrogen-doped hollow carbon nanospheres for carbonization and activation:
[0033] After mixing the nitrogen-doped hollow carbon nanospheres and elemental sulfur, heat treatmen...
Embodiment 1
[0059] This embodiment provides a lithium-sulfur battery cathode material and a preparation method thereof. The preparation method of the lithium-sulfur battery cathode material comprises the following steps:
[0060] S11: Add 0.45 g of Triton X-100 solution at 2°C to 450 g of deionized water at 2°C, stir with a magnetic stirrer for 60 minutes and mix evenly to form a diluted Triton X-100 solution;
[0061] S12: Add 2.2 g of pyrrole at 2°C and 2.8 g of aniline at 2°C to the diluted Triton X-100 solution prepared in the above steps, and continue stirring for 30 minutes to make pyrrole and aniline dissolve in Triton X-100. 100 evenly distributed in the solution;
[0062] S13: Add 60 mL of newly prepared 1M ammonium persulfate solution to the solution in step S12, stir gently for 30 s, and then stand for reaction at an ambient temperature of 0°C for 12 h;
[0063] S14: Wash the product obtained in step S13 with water several times, and filter it with suction until the filtrate ...
Embodiment 2
[0068] This embodiment provides a lithium-sulfur battery cathode material and a preparation method thereof. The preparation method of the lithium-sulfur battery cathode material comprises the following steps:
[0069] S11: Add 0.5 g of Triton X-100 solution at 0°C to 450 g of deionized water at 0°C, stir with a magnetic stirrer for 30 minutes and mix evenly to form a diluted Triton X-100 solution;
[0070] S12: Add 2.4 g of pyrrole at 0°C and 3.0 g of aniline at 0°C to the diluted Triton X-100 solution prepared in the above steps, and continue stirring for 30 minutes to make pyrrole and aniline dissolve in Triton X- 100 evenly distributed in the solution;
[0071] S13: Add 50 mL of newly prepared 1M ammonium persulfate solution to the solution in step S12, stir gently for 30 s, and then stand for reaction at an ambient temperature of 0° C. for 15 h;
[0072]S14: The product obtained in step S13 is washed with water several times, and suction filtered until the filtrate is cl...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More