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A kind of preparation method of ternary nickel cobalt manganese sulfide pseudocapacitive supercapacitor material

A supercapacitor, nickel-cobalt-manganese technology, which is applied in the field of preparation of ternary nickel-cobalt-manganese sulfide pseudocapacitor supercapacitor materials, can solve the problems of increasing the uncontrollable factors of the reaction process, the influence of the physicochemical and electrochemical properties of synthetic materials, etc. To achieve the effect of reducing uncontrollable factors, efficient application, and simple combination

Active Publication Date: 2021-06-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of low material synthesis, due to the uncontrollable high temperature and high pressure environment, and the two-step hydrothermal reaction increases the uncontrollable factors of the reaction process, it will have a significant impact on the physical, chemical and electrochemical properties of the synthesized materials.

Method used

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  • A kind of preparation method of ternary nickel cobalt manganese sulfide pseudocapacitive supercapacitor material
  • A kind of preparation method of ternary nickel cobalt manganese sulfide pseudocapacitive supercapacitor material
  • A kind of preparation method of ternary nickel cobalt manganese sulfide pseudocapacitive supercapacitor material

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Embodiment 1

[0032] A preparation method of a ternary nickel-cobalt-manganese sulfide pseudocapacitive supercapacitor material of the present invention, comprising the following steps:

[0033] (1) Weigh 0.2g of Ni prepared by coprecipitation method 0.8 co 0.1 mn 0.1 (OH) 2 (NCM811) precursor was placed in 100mL deionized water, and magnetically stirred for 30 minutes to obtain a uniformly dispersed suspension;

[0034] (2) Weigh 1.7156g sodium sulfide nonahydrate (Na 2 S·9H 2 O) Add to the above suspension, continue magnetic stirring for 30min to mix the two raw materials evenly, then transfer the mixed solution into a 200mL polytetrafluoroethylene reactor, keep it warm at 180°C for 8h, turn off the power of the oven, and make the reactor Take out after cooling to room temperature with the furnace;

[0035] (3) Suction and wash the reaction product obtained in step (2) with deionized water, place the obtained filter cake in a petri dish, add a small amount of deionized water for ult...

Embodiment 2

[0043] A preparation method of a ternary transition metal sulfide pseudocapacitive supercapacitor electrode material, comprising the following steps:

[0044] (1) Weigh 0.2g of Ni prepared by coprecipitation method 0.6 co 0.2 mn 0.2 (OH) 2 (NCM622 precursor) was placed in 100mL deionized water, and magnetically stirred for 30min to obtain a uniformly dispersed suspension;

[0045] (2) Weigh 1.7156g sodium sulfide nonahydrate (Na 2 S·9H 2 O) Add to the above suspension, continue magnetic stirring for 30 minutes to mix the two raw materials evenly, then transfer the mixed solution into a 200mL polytetrafluoroethylene reactor, keep it warm at 180°C for 10h, turn off the power of the oven, and make the reactor Take out after cooling to room temperature with the furnace;

[0046] (3) Use deionized water to filter and wash the reaction product, place the obtained filter cake in a petri dish, add a small amount of deionized water to ultrasonically disperse for 5 minutes to obta...

Embodiment 3

[0048] A preparation method of a ternary transition metal sulfide pseudocapacitive supercapacitor electrode material, comprising the following steps:

[0049] (1) Weigh 0.2 g of the NCM811 precursor prepared by the co-precipitation method, place it in 100 mL of deionized water, and stir it magnetically for 30 minutes to obtain a uniformly dispersed suspension;

[0050] (2) Weigh 0.5367g thioacetamide (CH 3 CSNH 2 ) into the above suspension, continue magnetic stirring for 30 minutes to mix the two raw materials evenly, then transfer the mixture into a 200mL polytetrafluoroethylene reactor, keep it warm at 180°C for 8 hours, turn off the power of the oven, and let the reactor Take out after cooling to room temperature;

[0051] (3) Use deionized water to filter and wash the reaction product, place the obtained filter cake in a petri dish, add a small amount of deionized water to ultrasonically disperse for 5 minutes to obtain a uniform suspension, put it in the freezer for pr...

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Abstract

The invention discloses a preparation method of a ternary nickel-cobalt-manganese sulfide pseudocapacitive supercapacitor material, comprising the following steps: adding a sulfur source into a nickel-cobalt-manganese precursor dispersion, stirring for 20-40min, and obtaining a uniformly mixed suspension liquid; add the suspension into the reaction kettle, react at 80°C-200°C for 6-24h, and cool with the furnace; wash and dry the obtained material to obtain a black powder, which is the ternary nickel-cobalt-manganese sulfide pseudocapacitor supercapacitor material. The present invention uses the nickel-cobalt-manganese precursor combined with a simple and easy-to-implement hydrothermal reaction, and obtains transition metal sulfide as the supercapacitor electrode material through the ion exchange reaction between the sulfur ion in the sulfur source and the hydroxide precursor, which reduces the time spent in the reaction process. The uncontrollable factors improve the stability of the synthetic material and provide a new idea for the development of transition metal sulfide pseudocapacitor supercapacitor electrode materials.

Description

technical field [0001] The invention belongs to supercapacitors, in particular to a method for preparing a ternary nickel-cobalt-manganese sulfide pseudocapacitive supercapacitor material. Background technique [0002] Supercapacitors have received extensive attention in recent years because of their long cycle life, high power density, and fast charge and discharge characteristics. According to their storage mechanism, supercapacitors can be divided into electric double layer supercapacitors (EDLCs) and pseudocapacitors. EDLCs are based on high specific surface area (>1000m 2 g -1 ) nanoporous materials are used as active electrode materials to store energy through the adsorption and desorption of electrode surface charges, but the low energy density of electric double layer supercapacitors limits its wide application. Pseudocapacitors use conductive polymers, metal oxides, or metal sulfides as electrodes, and sometimes functional porous carbons to combine electrostat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/24H01G11/86
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 颜果春董明霞张美辰王志兴李新海郭华军王接喜胡启阳彭文杰
Owner CENT SOUTH UNIV