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Active carbon/nickel cobaltate nano wire composite electrode material and preparation method thereof

A composite electrode and activated carbon technology, applied in the field of materials and electrochemistry, can solve the problems of poor conductivity and achieve the effect of short ion migration path and large specific surface area

Inactive Publication Date: 2017-03-22
SHANGHAI SHANSHAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The energy density generated by the Faraday pseudocapacitor is much higher than that of the electric double layer, but because the negative electrode material of the Faraday capacitor is generally a transition metal oxide, its application has been restricted due to its poor conductivity.

Method used

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  • Active carbon/nickel cobaltate nano wire composite electrode material and preparation method thereof
  • Active carbon/nickel cobaltate nano wire composite electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step (1), weigh the NiCl of 0.05mol 2 ·6H 2 0 and 0.1mol CoCl 2 ·6H 2 O, NiCl 2 ·6H 2 0 and CoCl 2 ·6H 2 The molar ratio of O is 1:2. NiCl 2 ·6H 2 0 and CoCl 2 ·6H 2 O was dissolved in 1L of deionized water, stirred evenly and prepared to contain Ni 2+ 、Co 2+ mixed metal salt solution, Ni 2+ and Co 2+ The total solubility is 0.15mol / L.

[0029] In step (2), weigh 87g of activated carbon 1, wash it with dilute hydrochloric acid, then wash it with deionized water, add it to the mixed metal salt solution prepared in step (1) after drying, and stir magnetically for 0.1-2 hours.

[0030] In step (3), weigh 0.18 mol of oxalic acid and add it to the mixture in step (2), stir ultrasonically for 2-5 hours, add ammonia water to adjust the pH value, and keep the pH value at 8.2.

[0031] In step (4), the mixed liquid in step (3) is transferred to a hydrothermal reaction kettle, and reacted hydrothermally at a temperature of 100° C. for 12 hours, and then the reacta...

Embodiment 2

[0035] Step (1) weighs the NiCl of 0.05mol 2 ·6H 2 0 and 0.1mol CoCl 2 ·6H 2 O, NiCl 2 ·6H 2 0 and CoCl 2 ·6H 2 The molar ratio of O is 1:2. NiCl 2 ·6H 2 0 and CoCl 2 ·6H 2 O was dissolved in 1L of deionized water, stirred evenly and prepared to contain Ni 2+ 、Co 2+ mixed metal salt solution, Ni 2+ and Co 2+ The total solubility is 0.15mol / L.

[0036] Step (2) Weigh 87g of activated carbon 1, wash it with dilute hydrochloric acid, wash it with deionized water, add it into the mixed metal salt solution prepared in step (1) after drying, and stir magnetically for 0.1-2 hours.

[0037] Step (3) Weigh 0.18 mol of oxalic acid and add it to the mixed liquid in step (2), stir ultrasonically for 2-5 hours, add ammonia water to adjust the pH value, and keep the pH value at 8.0.

[0038] In step (4), the mixed liquid in step (3) is transferred to a hydrothermal reaction kettle, and reacted hydrothermally at a temperature of 100° C. for 12 hours, and then the reactant is ...

Embodiment 3

[0042] Step (1) weighs the NiCl of 0.05mol 2 ·6H 2 0 and 0.1mol CoCl 2 ·6H 2 O, NiCl 2 ·6H 2 0 and CoCl 2 ·6H 2 The molar ratio of O is 1:2. NiCl2 ·6H 2 0 and CoCl 2 ·6H 2 O was dissolved in 1L of deionized water, stirred evenly and prepared to contain Ni 2+ 、Co 2+ mixed metal salt solution, Ni 2+ and Co 2+ The total solubility is 0.15mol / L.

[0043] Step (2) Weigh 87g of activated carbon 1, wash it with dilute hydrochloric acid, wash it with deionized water, add it into the mixed metal salt solution prepared in step (1) after drying, and stir magnetically for 0.1-2 hours.

[0044] Step (3) Weigh 0.18 mol of oxalic acid and add it to the mixed liquid in step (2), stir ultrasonically for 2-5 hours, add ammonia water to adjust the pH value, and keep the pH value at 7.0.

[0045] In step (4), the mixed liquid in step (3) is transferred to a hydrothermal reaction kettle, and reacted hydrothermally at a temperature of 100° C. for 12 hours, and then the reactant is fi...

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Abstract

The invention discloses an active carbon / nickel cobaltate nano wire composite electrode material and a preparation method thereof. The nickel cobaltate nano wire has a puffy structure and covers the surface of the active carbon, thereby forming an active / carbon cobaltate nano wire composite electrode material with a core shell structure. The preparation method comprises the steps of cleaning the active carbon by means of dilute hydrochloric acid, washing the cleaned active carbon by means of deionized water, and performing drying for standby; dissolving soluble nickel salt and soluble cobalt salt in the deionized water for preparing mixed metal salt solution; placing the active carbon into the mixed metal salt solution, adding oxalic acid, mixing to uniform and adding ammoniacal liquor for adjusting pH value, thereby obtaining precursor solution; and transferring the precursor solution into a hydrothermal reaction vessel for realizing reaction, then performing filtering, washing, drying and sintering, thereby obtaining a finished product. The active carbon / nickel cobaltate nano wire composite electrode material has advantages of puffy structure, large specific surface area, sufficient contact with electrolyte and short electrolyte ion migration path.

Description

technical field [0001] The invention relates to the fields of materials and electrochemistry, in particular to an activated carbon / nickel cobaltate nanowire composite electrode material and a preparation method thereof. Background technique [0002] As a new type of energy storage device, supercapacitors are widely used in lighting, electronics, electricity, communications, automobiles and other fields due to their irreplaceable advantages. Due to its good cycle performance, fast charging, good power performance, and low cost of use, supercapacitors have great potential as a new type of mobile power supply and electric vehicle power supply, and are expected to gradually replace lithium batteries. However, compared with lithium batteries, the energy density of supercapacitors is low, only one tenth of that of lithium batteries. Therefore, how to increase the energy density of supercapacitors has always been a research hotspot. The energy density of a supercapacitor depends ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/34H01G11/86
Inventor 仲林谢秋生张鹏昌丁晓阳吴志红江伟伟
Owner SHANGHAI SHANSHAN TECH CO LTD
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