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Zinc-doped mixed transition metal sulfide electrode material and preparation method thereof

A technology of transition metals and electrode materials, applied in the direction of active material electrodes, positive electrodes, battery electrodes, etc., can solve the problems of nickel-cobalt sulfide cycle and rate performance that need to be further improved, so as to improve electrochemical performance, promote full penetration, Operational controllable effects

Active Publication Date: 2020-11-06
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cycle and rate performance of NiCoS still need to be further improved

Method used

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  • Zinc-doped mixed transition metal sulfide electrode material and preparation method thereof
  • Zinc-doped mixed transition metal sulfide electrode material and preparation method thereof
  • Zinc-doped mixed transition metal sulfide electrode material and preparation method thereof

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Embodiment 1

[0026] A method for preparing a zinc-doped mixed-type transition metal sulfide electrode material, the specific steps are:

[0027] (1) Sonicate the carbon cloth with deionized water for about 30 minutes. Weigh 0.5 g of cobalt nitrate hexahydrate, 0.5 g of nickel nitrate hexahydrate, and 0.2 g of urea into 30 ml of deionized water, ultrasonically dissolve them and put them in a hydrothermal kettle. Heat reaction for 3 hours. After natural cooling, take out the carbon cloth and rinse and dry it several times;

[0028] (2) Weigh 0.3 g of cobalt nitrate hexahydrate and 0.08 g of zinc nitrate hexahydrate, add to 30 ml of methanol to obtain solution A, weigh 0.7 g of dimethylimidazole and add to 30 ml of methanol to obtain solution B, ultrasonically dissolve respectively, Immerse the product of step (1) in solution A, and stir slowly on a magnetic stirrer for 30 minutes, then slowly and uniformly drop solution B into solution A with a straw for 10 minutes, and continue stirring f...

Embodiment 2

[0032] A method for preparing a zinc-doped mixed-type transition metal sulfide electrode material, the specific steps are:

[0033] (1) Sonicate the carbon cloth with deionized water for about 60 minutes. Weigh 1.5 g of cobalt nitrate hexahydrate, 0.8 g of nickel nitrate hexahydrate and 0.5 g of urea into 70 ml of deionized water, ultrasonically dissolve them and put them in a hydrothermal kettle. Thermal reaction for 6 hours. After natural cooling, take out the carbon cloth and rinse and dry it several times;

[0034] (2) Weigh 0.5 g of cobalt nitrate hexahydrate and 0.15 g of zinc nitrate hexahydrate, add to 50 ml of methanol to obtain solution A, weigh 1.2 g of dimethylimidazole and add to 50 ml of methanol to obtain solution B, ultrasonically dissolve respectively, Immerse the product of step (1) in solution A, and stir slowly on a magnetic stirrer for 30 minutes, then slowly and uniformly drop solution B into solution A with a straw for 10 minutes, and continue stirring...

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Abstract

The invention discloses a zinc-doped mixed type transition metal sulfide electrode material and a preparation method thereof. The preparation method comprises the steps that cobalt nitrate hexahydrate, nickel nitrate hexahydrate and urea are added into deionized water and put into a hydrothermal kettle, and carbon cloth subjected to deionized water ultrasonic treatment is put into the hydrothermalkettle to be subjected to a hydrothermal reaction and washed and dried many times; cobalt nitrate hexahydrate and zinc nitrate hexahydrate are added into a methanol solution to obtain a solution A, dimethylimidazole is added into the methanol solution to obtain a solution B, the flushed and dried product is immersed into the solution A, the solution B is dropwise added into the solution A, and the carbon cloth is taken out, flushed and dried; and vulcanizing is performed with thioacetamide to obtain the electrode material. Nickel-cobalt sulfide particles with uniform microtopography and sizeof the prepared electrode material are connected to a nickel-cobalt nanowire array in series like a sugar-coated haws on stick, and the electrode material have relatively high specific capacitance, excellent rate capability and cycling stability.

Description

technical field [0001] The invention belongs to the field of preparation of zinc-ion battery electrode materials, and in particular relates to a zinc-doped mixed transition metal sulfide electrode material and a preparation method thereof. Background technique [0002] Due to their structural diversity, strong electrochemical activity, and higher electronic conductivity than oxides and hydroxides, transition metal sulfides can obtain high specific capacitance and energy density as electrode materials. It is reported to be used as the positive electrode material of aqueous zinc-ion battery. Mixed transition metal sulfides such as NiCo 2 S 4 , CoFe 2 S 4 , ZnCo 2 S 4 , MnCo 2 S 4 etc., due to its complex chemical composition and the synergistic effect between two or more metal elements, it usually has a high theoretical specific capacity and good cycle stability, and its conductivity is hundreds of times that of oxides. Among them, nickel-cobalt sulfide has gradually ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M10/38D06M15/37D06M11/53D06M10/02D06M101/40
CPCH01M4/362H01M4/38H01M4/5815H01M10/38D06M15/37D06M11/53D06M10/02H01M2004/028H01M2004/021D06M2101/40Y02P70/50
Inventor 陈奇俤叶帆蔡道平詹红兵
Owner FUZHOU UNIV
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