A kind of preparation method of conductive silver paste based on silver-coated graphite conductive agent
A technology of conductive silver paste and conductive agent, which is used in conductive materials, conductive materials, cable/conductor manufacturing, etc., can solve the problems of difficult to guarantee the uniformity of conduction, difficult to control the thickness of the silver-plated layer, and difficult to cover uniformly with silver. The effect of improving electron conductivity, low density, and reducing the amount of silver used
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Embodiment 1
[0031] Embodiment 1: preparation of sodium polysulfide solution
[0032] Dissolve 0.1 mol of anhydrous sodium sulfide in 200 ml of tetrahydrofuran to obtain a sodium sulfide solution, add 0.3 mol of sulfur, stir and react for 24 hours, and filter to obtain Na 2 S 4 solution.
Embodiment 2
[0033] Embodiment 2: Acetylene black adsorption sodium polysulfide
[0034]Dissolve 0.1 mol of anhydrous sodium sulfide in 200 ml of tetrahydrofuran to obtain a sodium sulfide solution, add 0.5 mol of sulfur, stir and react for 24 hours, and filter to obtain Na 2 S 6 solution.
[0035] Take the above Na 2 S 6 Solution 100mL, add 10g of commercially available acetylene black, ultrasonic treatment for 10min, ultrasonic frequency 40kHz, impregnation for 2h; make acetylene black saturated and adsorb sodium polysulfide, filter and dry to get Na 2 S 6 Modified acetylene black.
Embodiment 3
[0036] Example 3: Conductive carbon material super P adsorbs sodium polysulfide
[0037] Dissolve 0.1 mol of anhydrous sodium sulfide in 200 ml of tetrahydrofuran to obtain a sodium sulfide solution, add 0.7 mol of sulfur, stir and react for 24 hours, and filter to obtain Na 2 S 8 solution.
[0038] Take the above Na 2 S 8 Solution 100mL, add 20g commercial conductive carbon material super P, ultrasonic treatment 20min, ultrasonic frequency 40kHz, impregnation 6h; make conductive carbon material super P saturated adsorption sodium polysulfide, filter and dry to get Na 2 S 8 Modify super P.
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