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A kind of preparation method of tin oxide nanosheet array supercapacitor cathode material

A nanosheet array and supercapacitor technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of hindering high-performance pseudocapacitive electrode materials, poor capacitor rate performance, and nanostructure agglomeration. Good for rapid transfer, high capacitance, and large specific surface area

Inactive Publication Date: 2020-09-25
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the shortcomings of tin dioxide itself, such as poor electrical conductivity, serious nanostructure agglomeration, and poor capacitor rate performance, its practical application as a high-performance pseudocapacitive electrode material is hindered.

Method used

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  • A kind of preparation method of tin oxide nanosheet array supercapacitor cathode material
  • A kind of preparation method of tin oxide nanosheet array supercapacitor cathode material
  • A kind of preparation method of tin oxide nanosheet array supercapacitor cathode material

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preparation example Construction

[0038] The preparation method of the alloying enhanced oxygen-deficient tin oxide nanosheet array supercapacitor positive electrode material proposed by the present invention comprises the following steps and contents:

[0039] (1) First put 40-80mL deionized water in a beaker, then dissolve 1.5-2.3g stannous chloride dihydrate and 2.5-3.5g trisodium citrate in it, and stir magnetically for 20-40min to obtain a uniform, Stable milky white suspension, then slowly add absolute ethanol into the beaker according to the volume ratio of absolute ethanol: deionized water 3:1-1:5, and continue to stir for 30-60min to obtain a slightly white precursor solution, set aside .

[0040] (2) Transfer the precursor solution to the polytetrafluoroethylene lining of the autoclave, and fix the clean foamed nickel sheet vertically in the reactor, and completely immerse it in the precursor solution. Then, after the reaction kettle is sealed and assembled, it is placed in an oven for heat preserva...

Embodiment

[0048] Embodiment: first fill in 40mL deionized water in the beaker, then 2.073g tin protochloride dihydrate and 2.971g trisodium citrate are dissolved therein, obtain uniform, stable milky white suspension after magnetic stirring 30min, again Slowly add 40 mL of absolute ethanol into the beaker, and continue stirring for 30 min to obtain a slightly white precursor solution. Then, the precursor solution was transferred to the polytetrafluoroethylene liner of a 100mL autoclave, and a piece of 3.5cm×3.5cm clean nickel foam was vertically fixed in the reactor and completely immersed in the in the precursor solution. Then, after the reaction kettle was sealed and assembled, it was placed in an oven and kept at 180° C. for 12 hours. After naturally cooling to room temperature, open the reaction kettle, take out the nickel foam sample, rinse it with deionized water for 5 times, and place it in an oven at 100°C for 4 hours to dry it. Then, place the nickel foam sample obtained at t...

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Abstract

The invention relates to a method for preparing a positive electrode material of an alloy-reinforced anoxic stannic oxide nanosheet array supercapacitor, and belongs to the technical field of preparation of new energy materials and its application. The positive electrode material is composed of an anoxic stannic oxide nanosheet array grown on a foamed nickel substrate and partially Sn-Ni alloyed.The nanosheets grow so as to be vertically staggered to form a wall shape. As an operating electrode, the positive electrode material has a large specific capacitance, good cycle stability, and no harm to the human body. The method comprises firstly using stannous chloride dihydrate and trisodium citrate dihydrate as raw materials, and growing the raw materials by a solvothermal method on a foamednickel substrate to obtain an anoxic stannic oxide wall-shaped nanosheet array structure; and performing high-temperature thermal reduction and alloying in a vacuum tubular furnace to finally obtainthe positive electrode material. The method has large product output, achieves controllable compositions and shapes, uses simple raw materials, equipment and technological processes, and is low in cost, safe, clean and environment-friendly in production process, and beneficial to large-scale production.

Description

technical field [0001] The invention relates to a method for preparing an alloyed and enhanced oxygen-deficient tin oxide nanosheet array supercapacitor positive electrode material, and belongs to the technical field of new energy material preparation and application thereof. Background technique [0002] In recent years, in order to meet the sustainable and renewable demand for energy in modern society, energy storage materials have been developed rapidly. Compared with traditional batteries and other types of capacitors, supercapacitors exhibit faster charge and discharge rates, higher power density, longer cycle life, wide operating temperature range, and lower maintenance costs, thus attracting materials scholars. widespread attention. According to the charge storage mechanism, supercapacitors are mainly divided into electric double layer supercapacitors and pseudocapacitor supercapacitors. Among them, electric double layer supercapacitors usually use carbon-based acti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCH01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 彭志坚王琪田也符秀丽
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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