Cathode material used for high-energy tantalum mixed capacitor and preparation method thereof
A technology of hybrid capacitors and cathode materials, applied in capacitor electrodes, capacitor parts, capacitor electrolytes/absorbers, etc., can solve the problems of low impedance and difficult to meet requirements, and achieve the expansion of cathode specific capacitance surface area, ensure super capacity and ESR The effect of the requirement of other parameters
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Embodiment 1
[0013] A cathode material for a tantalum hybrid capacitor, the cathode material for a tantalum hybrid capacitor includes a cathode base material made of tantalum foil, and its special feature is that the surface of the cathode base material made of tantalum foil is coated with Amorphous oxide. An electrochemical capacitor is formed between the cathode coated with amorphous oxide and the impregnated electrolyte. The amorphous oxide coated on the tantalum foil is a composite material, and the composition of the composite material is: 73% of pyrrolidone solvent; 5% of polyvinyl fluoride polymer; 2%; RuO 2 , CuO and NiO 2 Other metal oxides are 20%.
[0014] The process of coating amorphous oxide on the tantalum foil cathode base material includes the following steps:
[0015] (1) Deoxygenation cleaning: According to the acidic solution composed of deionized water, nitric acid and hydrofluoric acid, put the cathode tantalum foil into the solution for 1h~2h, take it out, boil i...
Embodiment 2
[0020] A cathode material for a high-energy tantalum hybrid capacitor. The cathode material for a high-energy tantalum hybrid capacitor includes a cathode base material made of tantalum foil. The special feature is that the surface of the cathode base material made of tantalum foil is coated with Coated with an amorphous oxide. An electrochemical capacitor is formed between the cathode coated with amorphous oxide and the impregnated electrolyte. The amorphous oxide coated on the tantalum foil is a composite material, and the composition of the composite material is by weight percentage: pyrrolidone solution is 56%; vinyl fluoride homopolymer is 10%; ultrafine active carbon powder is 5%; RuO 2 、Al 2 o 3 and NiO 2 was 29%.
[0021] The process of coating amorphous oxide on the tantalum foil cathode base material includes the following steps:
[0022] (1) Deoxygenation cleaning: According to the acidic solution composed of deionized water, nitric acid and hydrofluoric acid,...
Embodiment 3
[0027] A cathode material for a tantalum hybrid capacitor, the cathode material for a tantalum hybrid capacitor includes a cathode base material made of tantalum foil, and its special feature is that the surface of the cathode base material made of tantalum foil is coated with Amorphous oxide. An electrochemical capacitor is formed between the cathode coated with amorphous oxide and the impregnated electrolyte. The amorphous oxide coated on the tantalum foil is a composite material, and the composition of the composite material is: 63% of pyrrolidone solvent; 7% of vinyl fluoride homopolymer; 3% of ultrafine activated carbon powder %;RuO 2 and NiO 2 was 27%.
[0028] The process of coating amorphous oxide on the tantalum foil cathode base material includes the following steps:
[0029] (1) Deoxygenation cleaning: According to the acidic solution composed of deionized water, nitric acid and hydrofluoric acid, put the cathode tantalum foil into the solution for 1h~2h, take i...
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