Method for preparing NaxMnO2 electrode materials in large scale

An electrode material and a large-scale technology, applied in the field of electrochemical energy storage, can solve the problems of difficult electrode material preparation, difficult large-scale preparation, complex process, etc., and achieve excellent electrochemical performance, easy large-scale industrial production, and simple process. Effect

Inactive Publication Date: 2019-06-25
NANCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Overcoming the high voltage NaxMnO in supercapacitors in the prior art 2 Due to the disadvantages of difficult preparation of electrode materials, complex process, high cost, and difficulty in large-scale preparation, a low-cost, low-energy consumption, and high-voltage supercapacitor cathode material NaxMnO is provided. 2 The preparation method simplifies the NaxMnO 2 Electrode preparation process can realize large-scale preparation of NaxMnO 2 Electrode material

Method used

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  • Method for preparing NaxMnO2 electrode materials in large scale
  • Method for preparing NaxMnO2 electrode materials in large scale
  • Method for preparing NaxMnO2 electrode materials in large scale

Examples

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Effect test

Embodiment 1

[0023] a) 9 g MnSO 4 Dissolve in 80 mL deionized water as solution A; 6 g KMnO 4 Dissolve in 200 mL to form solution B; slowly add solution A to solution B, place in a reaction kettle, react at 140°C for 12 hours, cool to room temperature, wash with deionized water, and dry. Then calcined in air at 400°C for 2 hours to obtain MnO 2 .

[0024] b) the MnO obtained in step a) 2 with anhydrous NaNO 3 Mix at a mass ratio of 2:1, and put the ball ink in a ball mill for 24 hours.

[0025] c) Put the mixture obtained in step b) into a muffle furnace, calcinate in air at 870°C for 12 hours, then wash with deionized water and dry to obtain NaxMnO 2 .

Embodiment 2

[0027] a) 9 g MnSO 4 Dissolve in 80 mL deionized water as solution A; 6 g KMnO 4 Dissolve in 200 mL to form solution B; slowly add solution A to solution B, place in a reaction kettle, react at 140°C for 12 hours, cool to room temperature, wash with deionized water, and dry. Then calcined in air at 400°C for 2 hours to obtain MnO 2 .

[0028] b) the MnO obtained in step a) 2 with anhydrous NaNO 3 Mix at a mass ratio of 1:1, and put the ball ink in a ball mill for 24 hours.

[0029] c) Put the mixture obtained in step b) into a muffle furnace, calcinate in air at 870°C for 12 hours, then wash with deionized water and dry to obtain NaxMnO 2 .

Embodiment 3

[0031] a) 9 g MnSO 4 Dissolve in 80 mL deionized water as solution A; 6 g KMnO 4 Dissolve in 200 mL to form solution B; slowly add solution A to solution B, place in a reaction kettle, react at 140°C for 12 hours, cool to room temperature, wash with deionized water, and dry. Then calcined in air at 400°C for 2 hours to obtain MnO 2 .

[0032] b) the MnO obtained in step a) 2 with anhydrous NaNO 3 Mix at a mass ratio of 1:2, and put the ball ink in a ball mill for 24 hours.

[0033] c) Put the mixture obtained in step b) into a muffle furnace, calcinate in air at 870°C for 12 hours, then wash with deionized water and dry to obtain NaxMnO 2 .

[0034] The preparation method of the invention has simple process, low requirements on equipment, has practicability, and is easy for large-scale industrial production. Prepared NaxMnO 2 With high specific capacitance and wide voltage window, electrode materials with special morphology and certain particle size and distribution ca...

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Abstract

A method for preparing NaxMnO2 electrode materials in a large scale comprises the following steps of: (1) mixing MnO2 with anhydrous NaNO3 according to a mass ratio of 0.5 to 2, and uniformly mixing the spherulitic graphite; (2) calcining the mixture obtained in the step (1) in a muffle furnace at a calcination temperature of 800 to 900 degrees centigrade for 5 to 10 hours; and (3) cleaning the compound obtained in the step (2) with deionized water and drying the compound. The method has a simple process, a low equipment requirement, good practicality and liable to achieve large-scale industrial production. The prepared NaxMnO2 has high Na content and excellent electrochemical performance, including an ultra-wide potential window of 0-1.3V (vs. Ag/ AgCl), high specific capacitance 260 F g-1, and excellent rate performance and cycle stability. The method can prepare a NaxMnO2 electrode material with a special shape and a certain particle size and distribution by controlling a process condition.

Description

technical field [0001] The invention belongs to the field of electrochemical energy storage and relates to a macro-preparation of NaxMnO 2 methods of electrode materials. Background technique [0002] As a new type of energy storage device, compared with batteries, supercapacitors are widely used in starting power supplies because of their high power density, fast charge and discharge capabilities, extremely high life, wide temperature range and environmental friendliness. , pulse power supply, military, mobile communication devices, computers and electric vehicles and other research fields. However, its energy density is much lower than that of batteries, which greatly limits its further application. Therefore, how to prepare high-efficiency electrode materials on a large scale to increase their energy density has become an urgent problem to be solved at this stage. [0003] At present, the electrode materials of supercapacitors mainly include carbon materials, metal oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/86
CPCH01G11/46H01G11/86
Inventor 袁凯黄俊陈义旺谈利承
Owner NANCHANG UNIV
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