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Double-active-ion-enhanced charge-discharge hybrid zinc ion battery energy storage device

A zinc-ion battery and ion-enhanced technology, which is applied in electrical components, secondary batteries, electrochemical generators, etc., can solve problems such as low energy density and cannot meet application needs, and achieve high specific capacity and high energy density.

Pending Publication Date: 2021-10-01
JIAXING HENGWEI BATTERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combining the advantages of the above three aspects, aqueous hybrid zinc-ion batteries are attracting more and more researchers' attention, however, their energy density is still low, which cannot meet the needs of practical applications.

Method used

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  • Double-active-ion-enhanced charge-discharge hybrid zinc ion battery energy storage device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A dual-active ion-enhanced rechargeable-discharge hybrid zinc-ion battery energy storage device: sheet Zn foil is used as the negative electrode, activated carbon is used as the positive electrode, carbon fiber is used as the positive electrode current collector, 1M ZnSO 4 +0.1M MnSO 4 as an electrolyte. From a mechanistic point of view, through the Zn on the negative electrode 2+ Dissolution deposition, ion adsorption-desorption process on the positive electrode and dissolution deposition of active manganese ions to store energy. The energy storage device operates at 0.2A g -1 The specific capacity can reach 177.1mAh g -1 .

Embodiment 2

[0038] A dual-active ion-enhanced rechargeable-discharge hybrid zinc-ion battery energy storage device: sheet Zn foil is used as the negative electrode, activated carbon is used as the positive electrode, carbon fiber is used as the positive electrode current collector, 1M ZnSO 4 +0.1M ZnBr 2 as an electrolyte. From a mechanistic point of view, through the Zn on the negative electrode 2+ Dissolution deposition, ion adsorption-desorption process on the positive electrode and redox process of bromide ions to store energy. The energy storage device operates at 0.2A g -1 The specific capacity can reach 253.9mAh g -1 .

Embodiment 3

[0040] A dual-active ion-enhanced rechargeable-discharge hybrid zinc-ion battery energy storage device: sheet Zn foil is used as the negative electrode, activated carbon is used as the positive electrode, carbon fiber is used as the positive electrode current collector, 1M ZnSO 4 +0.1M MnSO 4 +0.1M ZnBr 2 as an electrolyte. From a mechanistic point of view, through the Zn on the negative electrode 2+ Dissolution deposition, ion adsorption-desorption process on the positive electrode and dissolution deposition of active manganese ions and active bromide ions to store energy. The energy storage device operates at 0.2A g -1 The specific capacity can reach 312.2mAh g -1 .

[0041] Table 1 comparative example and embodiment electrolyte composition

[0042]

[0043] Table 2 comparative example and embodiment performance data

[0044] Comparative example 1 Example 1 2 3 Specific capacity (mAh g -1 )

118.7 177.1 253.9 312.2

[0045] figure ...

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Abstract

The invention relates to a double-active-ion-enhanced charge-discharge hybrid zinc ion battery energy storage device, which belongs to the technical field of preparation of electrochemical energy storage devices. A double-active-ion-enhanced charge-discharge hybrid zinc ion battery energy storage device comprises a positive electrode, a negative electrode and an electrolyte, wherein the negative electrode is metal zinc or zinc alloy, the positive electrode is a high-specific-surface-area carbon material with capacitive performance, the appearance of the positive electrode can be in an overall block shape or a powder shape, and the electrolyte contains at least one or two of active ions, namely bromine ions and manganese ions, and at least one of zinc ions, sulfate ions, or nitrate ions or chloride ions. Compared with a traditional zinc ion battery or a mixed zinc ion battery, the energy storage device disclosed in the invention has the advantages of high specific capacity and high energy density, and has commercial application potential.

Description

technical field [0001] The invention relates to a dual active ion enhanced rechargeable and dischargeable hybrid zinc ion battery energy storage device, which belongs to the technical field of preparation of electrochemical energy storage devices. Background technique [0002] With the development of clean energy such as wind energy, solar energy, and tidal energy, people urgently need efficient energy storage devices. In addition, the rapid development of mobile devices such as new energy vehicles, mobile phones, and notebooks also urgently requires energy storage devices with high energy, high power density, and environmental friendliness. [0003] Aqueous mixed zinc-ion battery adopts activated carbon material as the positive electrode. The positive electrode performs double-layer electrochemical energy storage through the adsorption and desorption of ions. Metal zinc is used as the negative electrode. The negative electrode performs electrochemical energy storage of batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36
CPCH01M10/36Y02E60/10
Inventor 汪剑平傅庆华陈宇王远
Owner JIAXING HENGWEI BATTERY