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Method for constructing zinc ion hybrid capacitor

A hybrid capacitor, zinc ion technology, applied in hybrid capacitors, hybrid capacitor electrodes, hybrid capacitor electrolytes, etc., can solve the problems of low potential window, low energy density, potential safety hazards, etc., to achieve high window, high energy density, product Stable quality effect

Inactive Publication Date: 2019-03-26
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[Energy Storage Materials 13 (2018), 1-7] reported an organic electrolyte zinc ion hybrid capacitor, because all electrolytes are organic systems, there are potential safety hazards
[Energy Storage Materials13 (2018), 96-102] reported a water-based ionic hybrid capacitor with a lower potential window and lower energy density

Method used

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  • Method for constructing zinc ion hybrid capacitor
  • Method for constructing zinc ion hybrid capacitor
  • Method for constructing zinc ion hybrid capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of three-dimensional activated carbon material with high ratio table

[0023] Weigh 10g of ethylenediaminetetraacetic acid monosodium salt, add it to a porcelain boat, put it in an argon atmosphere furnace, heat up to 700°C at a rate of 5°C / min, keep it for 1 h; take it out after cooling to room temperature, wash, dry, Obtain a nitrogen-containing three-dimensional carbon material;

[0024] The obtained nitrogen-containing three-dimensional carbon material was mixed with KOH in a mass ratio of 1:6, placed in an argon atmosphere furnace, heated to 800°C at a rate of 5°C / min, and kept for 1 h; after being cooled to room temperature, it was taken out, washed, and dried to obtain High ratio table three-dimensional activated carbon material.

[0025] 2. Assembly of zinc ion hybrid capacitor

[0026] 1) Prepare a basic aqueous solution of high-concentration salt electrolyte with water and sodium perchlorate in a molar ratio of 1:17;

[0027] 2) Add zinc sulfate to the ...

Embodiment 2

[0031] 1. Preparation of three-dimensional activated carbon material with high ratio table

[0032] Weigh 10g of ethylenediaminetetraacetic acid tetrasodium salt, add it to a porcelain boat, put it in an argon atmosphere furnace, heat it up to 900°C at a rate of 10°C / min, keep it for 0.5 h; take it out after cooling down to room temperature, wash and dry it, Obtain a nitrogen-containing three-dimensional carbon material;

[0033] The obtained nitrogen-containing three-dimensional carbon material was mixed with KOH according to a mass ratio of 1:8, placed in an argon atmosphere furnace, heated to 900°C at a rate of 1°C / min, and kept for 2h; after being cooled to room temperature, it was taken out, washed and dried to obtain high Compare table three-dimensional activated carbon cathode material.

[0034] 2. Assembly of zinc ion hybrid capacitor

[0035] 1) Prepare a basic aqueous solution of high-concentration salt electrolyte with a molar ratio of water and potassium acetate of 1:27; ...

Embodiment 3

[0040] 1. Preparation of three-dimensional activated carbon cathode material

[0041] Weigh 10g of ethylenediaminetetraacetic acid disodium salt into a porcelain boat, put it in an argon atmosphere furnace, heat up to 500°C at a rate of 10°C / min, keep it for 2h; take it out after cooling to room temperature, wash and dry, Nitrogen three-dimensional carbon material;

[0042] The obtained nitrogen-containing three-dimensional carbon material was mixed with KOH according to a mass ratio of 1:4, placed in an argon atmosphere furnace, heated to 700°C at a rate of 10°C / min, kept for 2h, then taken out after cooling to room temperature, washed and dried to obtain High ratio table three-dimensional activated carbon cathode material.

[0043] 2. Assembly of zinc ion hybrid capacitor

[0044] 1) Prepare a basic aqueous solution of high-concentration salt electrolyte with a molar ratio of water and potassium acetate of 1:15;

[0045] 2) Add zinc perchlorate to the basic aqueous electrolyte solut...

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Abstract

The invention discloses a method for constructing a zinc ion hybrid capacitor. The method comprises: 1) preparing a high-concentration salt electrolyte base aqueous solution by water and potassium acetate or sodium perchlorate; 2) adding a zinc salt to the electrolyte basic aqueous solution, and preparing a composite salt electrolyte; 3) coating a metal electrode piece with a high-specific-surfacethree-dimensional activated carbon material to obtain a three-dimensional activated carbon positive electrode; 4) successively assembling the zinc sheet, a diaphragm added with the composite salt electrolyte, and the three-dimensional activated carbon positive electrode into the zinc ion hybrid capacitor. The zinc ion hybrid capacitor has high energy density and power density, and has excellent performance. Since the used electrolyte is a water system, the zinc ion hybrid capacitor has excellent safety performance.

Description

Technical field [0001] The invention relates to a construction method of a hybrid capacitor, in particular to a construction method of a zinc ion hybrid capacitor, and belongs to the field of energy storage devices. Background technique [0002] Hybrid capacitors combine high energy density battery negative electrodes with high power density and long cycle life capacitor positive electrodes. Existing lithium, sodium, and potassium ion hybrid capacitors cannot be directly used as battery negative electrodes because the metal negative electrode is sensitive to water and oxygen. The generally selected negative electrode material requires metal ion pre-insertion to achieve high performance requirements of hybrid capacitors. Therefore, the key of this technology is relatively cumbersome, which is not conducive to large-scale production, and the safety performance of the organic electrolyte used is poor. Since zinc flakes are relatively stable in a water and oxygen environment, zinc f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/06H01G11/24H01G11/44H01G11/62
CPCH01G11/06H01G11/24H01G11/44H01G11/62H01G11/84H01G11/86Y02E60/13
Inventor 阎兴斌杨兵军陈江涛程斌斌马鹏军
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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