Nickel ferrite based lithium-ion hybrid capacitor and preparation method thereof

A hybrid capacitor, nickel ferrite-based technology, applied in the direction of hybrid capacitors, hybrid/electric double layer capacitor manufacturing, hybrid capacitor electrodes, etc., can solve the problems that are not suitable for large-scale industrial production, large energy consumption, cumbersome steps, etc. Achieve the effect of low production cost, high energy density and power density, simple and safe method

Inactive Publication Date: 2016-06-15
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The VN/graphene composite material in the hybrid capacitor needs to be treated with argon/ammonia gas at high temperature. The porous carbon used needs to be carbonized with...

Method used

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  • Nickel ferrite based lithium-ion hybrid capacitor and preparation method thereof
  • Nickel ferrite based lithium-ion hybrid capacitor and preparation method thereof
  • Nickel ferrite based lithium-ion hybrid capacitor and preparation method thereof

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Experimental program
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Embodiment 1

[0031] The activated carbon and graphene are mixed in a mass ratio of 98:2 to obtain a positive electrode material. The positive electrode material, conductive carbon black, and polyvinylidene fluoride were slurried in a mass ratio of 8:1:1, coated on aluminum foil, and dried as a positive electrode; weigh 0.37g nickel nitrate and 1.04g iron nitrate in turn, Dissolve in 10mL ethanol, add to 50mL 1mgmL that has been ultrasonically peeled for 2h -1 Add 0.5g of urea to the ethanol suspension of activated carbon and react at 180℃ for 18h. After the reaction, use deionized water and ethanol to wash by centrifugation. Then take 100mg of the product from the previous step and disperse it in 200mL of ethanol. Add 200μL of aniline monomer After stirring, add 0.18 mL of hydrochloric acid and 490 mg of ammonium persulfate, react for 9 hours in an ice bath, centrifuge, wash, and dry to obtain a nickel ferrite-based ternary composite material to obtain a negative electrode material. It is s...

Embodiment 2

[0034] The activated carbon and graphene are mixed in a mass ratio of 90:10 to obtain a positive electrode material. The positive electrode material, conductive carbon black, and polyvinylidene fluoride were slurried in a mass ratio of 8:1:1, coated on aluminum foil, and dried as a positive electrode; weigh 0.37g nickel nitrate and 1.04g iron nitrate in turn, Dissolve in 10mL ethanol, add to 50mL 3mgmL that has been ultrasonically peeled for 2h -1 Add 5g of urea to the ethanol suspension of graphite oxide, and react at 180℃ for 24h. After the reaction, wash with deionized water and ethanol by centrifugation. Then take 100mg of the product from the previous step and disperse it in 50mL of ethanol. Add 100μL of aniline monomer After stirring, add 0.09mL hydrochloric acid and 245mg ammonium persulfate, react for 15h in an ice bath, centrifuge, wash, and dry to obtain a nickel ferrite-based multi-element composite material. It is slurried with conductive carbon black and polyvinyli...

Embodiment 3

[0038] The activated carbon and graphene are mixed in a mass ratio of 95:5 to obtain a positive electrode material. The positive electrode material, conductive carbon black, and polyvinylidene fluoride were slurried in a mass ratio of 8:1:1, coated on aluminum foil, and dried as a positive electrode; weigh 0.37g nickel nitrate and 1.04g iron nitrate in turn, Dissolve in 10ml of ethanol, add to 50ml of 2mgmL that has been ultrasonically peeled for 2h -1 Add 2.5g of urea to the graphene oxide suspension and react at 180°C for 20 hours. After the reaction, use deionized water and ethanol to wash by centrifugation. Then take 100mg of the product from the previous step and disperse it in 100mL of ethanol. Add 50μL of aniline monomer. After stirring, add 0.045mL hydrochloric acid and 126mg ammonium persulfate, react for 12h in an ice bath, centrifuge, wash, and dry to obtain a nickel ferrite-based multi-element composite material. It is slurried with conductive carbon black and polyv...

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Abstract

The invention discloses a nickel ferrite-based lithium ion hybrid capacitor and a preparation method thereof. The method uses a mixed material of activated carbon and graphene as the positive electrode material; disperses the carbon material with ethanol, dissolves iron nitrate, nickel nitrate and urea, and obtains a binary composite material precursor through solvothermal reaction, and in situ polymerizes aniline on the precursor to obtain iron A nickel-based ternary composite material is used as the negative electrode material and pre-intercalated with lithium; lithium hexafluorophosphate is used as the electrolyte to assemble a lithium-ion hybrid capacitor. The lithium-ion hybrid capacitor negative electrode material prepared by the invention has a stable structure, a simple preparation method, no need for high-energy consumption follow-up treatment such as high-temperature calcination, high capacity, small internal resistance, and good cycle stability. The lithium-ion hybrid capacitor prepared by the invention has excellent performance, a large operating voltage range, high energy density and power density, and broad application prospects.

Description

Technical field [0001] The invention relates to a nickel ferrite-based lithium ion hybrid capacitor and a preparation method thereof, in particular to a lithium ion hybrid capacitor with a nickel ferrite-based ternary composite material as an electrode material and a preparation method thereof, and belongs to the technical field of batteries and supercapacitors . Background technique [0002] Lithium-ion hybrid capacitors are energy storage devices that use lithium-ion batteries and supercapacitor electrode materials for the positive and negative electrodes, and have high energy density and power density. The currently reported lithium-ion hybrid capacitors use graphite, metal oxide, lithium titanate and other materials that can deintercalate lithium, while the capacitor material uses porous carbon, activated carbon, carbon nanotubes, etc. Electric double layer capacitor material. At present, a graphite-based lithium-ion hybrid capacitor has appeared on the Japanese market, but...

Claims

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Application Information

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IPC IPC(8): H01G11/06H01G11/84H01G11/86H01G11/50H01G11/30H01G11/32H01G11/48
CPCY02E60/13H01G11/06H01G11/30H01G11/32H01G11/48H01G11/50H01G11/84H01G11/86
Inventor 郝青丽童路攸夏锡锋雷武王文娟刘鹏
Owner NANJING UNIV OF SCI & TECH
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