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Preparation method of ternary nickel-cobalt-manganese sulfide pseudocapacitance supercapacitor material

A supercapacitor, nickel-cobalt-manganese technology, applied in the field of preparation of ternary nickel-cobalt-manganese sulfide pseudocapacitive supercapacitor materials, can solve the problems of increasing the uncontrollable factors of the reaction process, the influence of the physical chemistry and electrochemical performance of the synthetic material, etc. Achieve the effect of reducing uncontrollable factors, efficient application and improving stability

Active Publication Date: 2019-08-06
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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  • Preparation method of ternary nickel-cobalt-manganese sulfide pseudocapacitance supercapacitor material
  • Preparation method of ternary nickel-cobalt-manganese sulfide pseudocapacitance supercapacitor material
  • Preparation method of ternary nickel-cobalt-manganese sulfide pseudocapacitance 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 pseudocapacitance supercapacitor material, which comprises the steps of adding a sulfur source into a nickel-cobalt-manganese precursor dispersion liquid, stirring for 20-40min to obtain a uniformly mixed suspension; adding the suspension into a reactor, reacting for 6-24h at a temperature of 80-200 DEG C, and cooling with the furnace; and washing and drying the obtained material to obtain black powder, namely, the ternary nickel-cobalt-manganese sulfide pseudocapacitance supercapacitor material. According to the invention, a transition metal sulfide is obtained through ion exchange reaction between sulfur ions in the sulfur source and a hydroxide precursor by adopting the nickel-cobalt-manganese precursor and combining the simple and easily implemented hydrothermal reaction to serve as the supercapacitor electrode material, thereby reducing uncontrollable factors in the reaction process, improving the stability of the synthetic material, and providing a new idea for the development of the transition metal sulfide pseudocapacitance supercapacitor electrode material.

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 Applications(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
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