A method for chemically doping Pb on the surface of negative electrode carbon material for super battery
A surface chemistry, super lead-acid battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limited hydrogen suppression effect, Pb powder doping, doping depth, poor uniformity, etc. Doping, reducing hydrogen evolution, the effect of simple method
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Embodiment 1
[0028] Activated carbon was vulcanized at a constant temperature for 2 hours in a S vapor atmosphere (two-stage furnace was used for vulcanization, wherein the temperature of the sulfur evaporation zone was 200 °C, and the temperature of the AC vulcanization zone was 400 °C), and then the S2AC was placed in 0.1mol / LPb (NO 3 ) 2 The solution was ultrasonically oscillated for 10 min, filtered and dried to obtain a doped and modified AC-S-Pb sample.
[0029] The modified activated carbon, binder, and conductive agent are adjusted into a slurry in a certain proportion, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode is 0.0080g cm -2 , The coating amount of the modified electrode is 0.0085g. cm -2 ), packaged into a 1cm 2 The activated carbon electrode is used for the hydrogen evolution (linear polarization curve) test on the 2273 electrochemical workstation using a three-electrode system, and the test solution is 5mol / LH 2 SO 4 .
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Embodiment 2
[0032] Activated carbon in O 2 Constant temperature oxidation in the atmosphere for 6h, the oxidation temperature is 600°C, and then the oxidation AC is placed in 0.1mol / LPb(NO 3 ) 2 The solution was ultrasonically oscillated for 1h, filtered and dried, and then placed in 0.1mol / LH 3 PO 4 Vacuum impregnated in the solution for 24h, filtered and dried to obtain the doped modified AC-O-Pb sample.
[0033] The modified activated carbon, binder, and conductive agent are adjusted into a slurry in a certain proportion, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode is 0.0080g cm -2 , The coating amount of the modified electrode is 0.0083g. cm -2 ), packaged into a 1cm 2 The activated carbon electrode is used for the hydrogen evolution (linear polarization curve) test on the 2273 electrochemical workstation using a three-electrode system, and the test solution is 5mol / LH 2 SO 4 .
[0034] At -0.9V, the hydrogen evolution current p...
Embodiment 3
[0036] activated carbon in SO 2 Constant temperature vulcanization in the atmosphere for 24h, the vulcanization temperature is 200 ℃, and then put SiAC in 0.1mol / LPb(CH 3 COO) 2 The solution was ultrasonically oscillated for 1h, filtered and dried, and then placed in 0.1mol / LH 2 SO 4 Vacuum impregnated in the solution for 24h, filtered and dried to obtain the doped modified AC-S-Pb sample.
[0037] The modified activated carbon, binder, and conductive agent are adjusted into a slurry in a certain proportion, and evenly coated on the Ti plate current collector (the coating amount of the AC electrode is 0.0080g cm -2 , The coating amount of the modified electrode is 0.0082g. cm -2 ), packaged into a 1cm 2 The activated carbon electrode is used for the hydrogen evolution (linear polarization curve) test on the 2273 electrochemical workstation using a three-electrode system, and the test solution is 5mol / LH 2 SO 4 .
[0038] At -0.9V, the hydrogen evolution current per un...
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