Solid electrolytic capacitor and method for preparing the same
A technology of solid electrolysis and solid electrolyte, which is applied in the direction of solid electrolytic capacitors and capacitor parts, etc., can solve the problems of low performance and achieve the effect of low unit price, simple method and excellent ESR performance
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Embodiment 1
[0105] (Synthesis of polystyrenesulfonic acid-poly(3,4ethylenedioxy)thiophene)
[0106] 5g of 3,4-ethylenedioxythiophene, 500g of 3wt% polystyrene sulfonic acid aqueous solution, 9g of sodium persulfate, 2g of ferric sulfate, and 5g of concentrated sulfuric acid were dissolved in 1500ml of water and stirred for 18 hours .
[0107] After treatment with aqueous ammonia, ion exchange resin was used to remove residual ions in the solution to obtain dark blue 1.6 wt% polystyrene sulfonate ammonium-poly(3,4-ethylenedioxy)thiophene aqueous solution.
[0108] 10 g of the obtained 1.6 wt % polystyrenesulfonic acid-poly(3,4-ethylenedioxy)thiophene aqueous solution and 0.8 g of triethylene glycol were mixed and stirred to obtain a dark blue solid electrolyte solution.
[0109] (Manufacturing of solid electrolytic capacitors)
[0110] After the solid electrolyte solution is impregnated into the semi-finished element of the wound capacitor by vacuum decompression method, it is dried in a...
Embodiment 2
[0113]10 g of 1.6 wt % polystyrenesulfonic acid-poly(3,4-ethylenedioxy)thiophene aqueous solution obtained in Example 1 and 0.8 g of polyglycol 200 were mixed and stirred to obtain a dark blue solid electrolyte solution.
[0114] After the solid electrolyte solution is impregnated into the semi-finished element of the winding capacitor by vacuum decompression, it is dried in an oven at 120°C, and then dried in an oven at 120°C after impregnating 10wt% ammonium adipate aqueous solution. After impregnating the 10wt% polyimide-N-methyl-2-pyrrolidone solution containing 0.5wt% vitamin C into the element of the solid electrolyte by vacuum decompression method, dry it in an oven at 120°C to obtain Solid electrolyte element with organic protective film. The solid electrolytic capacitor is obtained after the element containing the solid electrolyte is sealed with a casing and a rubber cover. Table 1 shows the results of evaluating the performance (capacity, ESR) of the solid electrol...
Embodiment 3
[0116] The 1.6wt% polystyrenesulfonic acid-poly(3,4-ethylenedioxy)thiophene aqueous solution that embodiment 1 obtains, the xylitol of 0.2g, the polyglycol 10000 of 0.8g, the 25wt% of 6g The polysulfonate resin was mixed and stirred to obtain a dark blue solid electrolyte solution. In the same manner as in Example 2, a solid electrolytic capacitor was obtained, and the evaluation results are shown in Table 1.
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