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Preparation method of Mn-doped CoP nanowire modified nanosheet array layered structure supercapacitor electrode material

A technology of supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems of large contact resistance, small specific surface area, weak relaxation volume change ability, etc.

Inactive Publication Date: 2018-09-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem mainly solved by the present invention is to overcome defects such as large contact resistance, cumbersome electrode preparation process, small specific surface area that can be in contact with the electrolyte, and weak ability to ease volume change caused by general electrode materials. CoP materials are directly grown on conductive substrates in situ to prepare electrode materials with three-dimensional nano-array hierarchical structure. Using its nanowires to modify the hierarchical structure of nanosheets and the synergistic effect between various metals, it can be used as an electrode material for supercapacitors, showing extremely high electrochemical energy storage properties

Method used

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  • Preparation method of Mn-doped CoP nanowire modified nanosheet array layered structure supercapacitor electrode material
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  • Preparation method of Mn-doped CoP nanowire modified nanosheet array layered structure supercapacitor electrode material

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example 1

[0021] (1) Material preparation: MnSO 4 ·H 2 O (0.2 mmol), Co (NO3 ) 2 ·6H 2 O (2 mmol), urea (10 mmol), and NH 4 F (5mmol), dissolved in 40 mL deionized water, stirred evenly, a piece size is 2×3 cm 2 Nickel foam (NF) was pretreated with absolute ethanol, 5% dilute hydrochloric acid and deionized water for 10 min respectively;

[0022] (2) Hydrothermal reaction: move the solution in step (1) and the treated NF into a 50 mL polytetrafluoroethylene autoclave, seal the autoclave, place it in an oven, and react at 120 °C for 6 h;

[0023] (3) Washing and drying: After the reaction in step (2) is completed, put the polytetrafluoroethylene autoclave in the air to cool to room temperature, take out the NF evenly covered by the pink substance, wash it in ultrasonic wave for several times, and store it at 60°C Dry under vacuum for 24 h to prepare the Mn-Co hydroxide nanoarray precursor;

[0024] (4) Low-temperature phosphating: the Mn-Co precursor obtained in step (3) and NaH ...

example 2

[0027] (1) Material preparation: MnSO 4 ·H 2 O (0.4 mmol), Co (NO 3 ) 2 ·6H 2 O (4 mmol), urea (20 mmol), and NH 4 F (10mmol), dissolved in 80 mL deionized water, stirred evenly, one piece size is 2×3 cm 2 Nickel foam (NF) was pretreated with absolute ethanol, 5% dilute hydrochloric acid and deionized water for 10 min respectively;

[0028] (2) Hydrothermal reaction: move the solution in step (1) and the treated NF into a 100 mL polytetrafluoroethylene autoclave, seal the autoclave, place it in an oven, and react at 120 °C for 6 h;

[0029] (3) Washing and drying: After the reaction in step (2) is completed, put the polytetrafluoroethylene autoclave in the air to cool to room temperature, take out the NF evenly covered by the pink substance, wash it in ultrasonic wave for several times, and store it at 60°C Dry under vacuum for 24 h to prepare the Mn-Co hydroxide nanoarray precursor;

[0030] (4) Low-temperature phosphating: the Mn-Co precursor obtained in step (3) and...

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Abstract

The invention discloses a preparation method of a three-dimensional layered structure Mn-doped CoP nanowire modified nanosheet array material (Mn-CoP NS@NW / NF) which is grown in situ on nickel foam. With cobalt-nitrate hexahydrate adopted as a cobalt source, manganese sulfate monohydrate adopted as a manganese source, ammonium fluoride and urea used to control the shape of the material, foamed nickel used as a substrate, a Mn-Co precursor can be prepared by using a hydrothermal method; and a low temperature preservation type phosphorization is carried out, so that the Mn-CoP NS@NW / NF can be synthesized. When being applied to a supercapacitor self-supporting electrode material, the Mn-CoP NS@NW / NF exhibits extremely high area specific capacitance (8.66 F cm<-2>) in 6 M KOH electrolyte, suchkind of performance of the Mn-CoP NS@NW / NF is much higher than that of an undoped CoP nanowire array material. On the basis of full utilization of the high specific surface area of a nano-array layered structure and the synergistic effects of various metals, the novel energy storage material has the advantages of high area ratio capacitance, long cycle life and low cost.

Description

technical field [0001] The present invention relates to the preparation of materials with metal doping and three-dimensional nano-array hierarchical structure and its application to supercapacitor electrode materials, in particular to a method for in-situ growth of nanowire-coated nano-sheet array hierarchical structure on nickel foam (NF) Mn-Co precursor, and then prepare Mn-CoP NS@NW / NF by low-temperature phosphating, and the application of this material in the field of electrochemical energy storage. High-performance supercapacitor electrode materials can be prepared only by a simple, controllable, and economical synthesis method. Background technique [0002] With the rapid growth of population, the globalization of industry and the rapid development of the world economy, human beings over-exploit and consume fossil energy, resulting in the discharge of a large amount of harmful gases, which seriously damages the environment on which human beings live. The energy and en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86
CPCH01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 姚亚东朱贵磊杨林
Owner SICHUAN UNIV
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