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Cu2-xSe supercapacitor negative electrode material with high specific capacity

A cu2-xse and supercapacitor technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve problems such as unsatisfactory specific capacity, and achieve the effects of improving stability, fast kinetics, and high conductivity

Active Publication Date: 2021-04-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific capacity of these materials is far from ideal

Method used

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  • Cu2-xSe supercapacitor negative electrode material with high specific capacity
  • Cu2-xSe supercapacitor negative electrode material with high specific capacity
  • Cu2-xSe supercapacitor negative electrode material with high specific capacity

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Step 1: High-purity elemental Cu and Se are used as starting materials, according to the stoichiometric ratio of Cu 1.85 Se weighing, at this time x=0.15, put the weighed raw materials into a ball ink tank equipped with grinding balls in an argon atmosphere and seal it; put the above ball mill tank with raw materials into a high-energy ball mill for 10h to perform alloy grinding to obtain nano-sized powder;

[0019] Step 2: Cu obtained in Step 1 1.85 Se powder was placed in an agate mortar, according to Cu 1.85 Se powder: acetylene black: polyvinylidene fluoride at a ratio of 7:2:1 Add acetylene black and polyvinylidene fluoride, and add 0.5mL ~ 0.7mL N-methylpyrrolidone dropwise, mix everything and then fully Grind for 0.5 hour to obtain mixed slurry;

[0020] Step 3: evenly scrape the mixed slurry obtained in step 2 on the surface of nickel foam treated with deionized water and alcohol ultrasonic treatment (the surface density of foam nickel is 290~430g / m2, the ape...

Embodiment 2

[0027] Step 1: High-purity elemental Cu and Se are used as starting materials, according to the stoichiometric ratio of Cu 1.8Se weighing, at this time x = 0.2, put the weighed raw materials into a ball ink tank equipped with grinding balls in an argon atmosphere and seal it; put the above ball mill tank with raw materials into a high-energy ball mill for 10 hours of ball milling for alloying to obtain nano-sized powder;

[0028] Step 2: Cu obtained in Step 1 1.8 Se powder was placed in an agate mortar, according to Cu 1.8 Se powder: acetylene black: polyvinylidene fluoride at a ratio of 7:2:1. Add acetylene black and polyvinylidene fluoride, and add 0.5mL~0.7mL N-methylpyrrolidone dropwise. Grind for 0.5 hour to obtain mixed slurry;

[0029] Step 3: evenly scrape the mixed slurry obtained in step 2 on the surface of nickel foam treated with deionized water and alcohol ultrasonic treatment (the surface density of foam nickel is 290 ~ 430g / m2, the aperture is 0.3 ~ 0.7mm, th...

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Abstract

The invention discloses a Cu2-xSe supercapacitor negative electrode material with high specific capacity and a manufacturing method thereof, and relates to the field of supercapacitors, in particular to application of the Cu2-xSe material to the field of supercapacitors. The Cu2-xSe material applied to a supercapacitor has relatively high conductivity, provides faster dynamics for electrochemical reaction, reduces the interface resistance between an electrolyte and an electrode, and shows specific capacity up to 1040F g-1 in a strongly alkaline aqueous solution. It is showed that the Cu2-xSe material is a potential supercapacitor negative electrode material with excellent electrochemical performance.

Description

technical field [0001] The invention relates to the field of supercapacitors, in particular to Cu 2-x Se materials are used in the field of supercapacitors. Background technique [0002] A supercapacitor is a new type of energy storage device between a capacitor and a battery. It relies on rapid and reversible adsorption / desorption or redox reactions on the surface or near the surface to store energy. It has high specific capacity, long cycle life, and The characteristics of high-current charging and discharging are research hotspots in the emerging green energy field. Compared with conventional secondary batteries, supercapacitors have many excellent characteristics such as high power density, short charging time, wide operating temperature range, green and pollution-free, making them promising to become a new generation of energy storage devices. Electrode materials are the core components of supercapacitors and one of the most important factors determining the performan...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/86H01G11/26
CPCH01G11/26H01G11/30H01G11/86Y02E60/13
Inventor 姜晶李志鹏何欣芮牛夷胡娅林王超
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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