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Low-temperature zinc ion battery

A zinc-ion battery, low-temperature technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of insufficient low-temperature performance of batteries, increased use costs, and additional equipment burden, and achieve excellent power performance, long cycle life, high Effects of specific capacity and energy density

Inactive Publication Date: 2018-09-25
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the external means adopted to address the defects of low-temperature performance of the battery mainly include heating the battery and creating a small constant temperature environment. Although the performance of the battery in a low-temperature environment can be improved to a certain extent, it has resulted in increased use costs and additional equipment burdens. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Under anhydrous and oxygen-free conditions, ethyl acetate was used as a solvent, and zinc trifluoromethanesulfonate was dissolved in ethyl acetate at a concentration of 2 mol / L to obtain the low-temperature electrolyte. It is made by mixing pyrene-4,5,9,10-tetraketone (PTO) as the positive electrode active material with conductive agent carbon black and binder polytetrafluoroethylene (PTFE) in a mass ratio of 6:3:1 The slurry is rolled into a film and then dried, cut and pressed on a titanium mesh to obtain a positive electrode sheet. Zinc-ion button batteries are assembled with metal zinc sheet as the negative electrode. The assembled zinc-ion battery was charged and discharged at a rate of 0.1C on an electrochemical workstation, and the specific capacity was 352mAh g at room temperature 25°C -1 (calculated based on the mass of the positive active material), the specific capacity at low temperature -40°C is 248 mAh g -1 , the capacity still reaches 170 mAh g at ultr...

Embodiment 2

[0030] Under anhydrous and oxygen-free conditions, ethyl acetate was used as a solvent, and zinc trifluoromethanesulfonate was dissolved in ethyl acetate at a concentration of 2 mol / L to obtain the low-temperature electrolyte. It is made by mixing polypyrene-4,5,9,10-tetraketone (PPTO) as the positive electrode active material with conductive agent activated carbon and binder polyvinylidene fluoride (PVDF) in a mass ratio of 6:3:1 The slurry is rolled into a film and then dried, cut and pressed on a titanium mesh to obtain a positive electrode sheet. Zinc-ion button batteries are assembled with metal zinc foil as the negative electrode. The assembled zinc-ion battery was charged and discharged on the electrochemical workstation at a rate of 0.1C, and the specific capacity was 190 mAh g at room temperature 25 °C -1 (calculated based on the mass of the positive active material), the specific capacity at -40°C is 128 mAh g -1 , the capacity still reaches 103 mAh g at ultra-low...

Embodiment 3

[0032] Under anhydrous and oxygen-free conditions, zinc sulfate (ZnSO 4 ) was dissolved in ethyl acetate at a concentration of 2 mol / L to obtain the low-temperature electrolyte. Use calix[4]-quinone (CAQ) as the positive electrode active material, mix it with the conductive agent acetylene black and the binder carboxymethylcellulose (CMC) according to the mass ratio of 6:3:1 to make a slurry, and roll it out After the film is formed, it is dried, cut and pressed on a titanium mesh to make a positive electrode sheet. A zinc-ion button battery is assembled with the zinc material deposited on the graphene substrate as the negative electrode. The assembled zinc-ion battery was charged and discharged on the electrochemical workstation at a rate of 0.1C, and the specific capacity was 305 mAh g at room temperature 25 °C -1 (Based on the mass of the positive active material), the specific capacity at -40°C is 210 mAh g -1 , the capacity still reaches 135 mAh g at ultra-low tempera...

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Abstract

The invention belongs to the technical field of batteries and particularly relates to a low-temperature zinc ion battery, comprising a cathode, an anode, and low-temperature electrolyte. The cathode is made from organics containing carbonyl functional groups, such as quinones, embedded compounds that may reversely dis-embed Zn2+, Li+ and Na+, or Prussian blue derivatives. The anode comprises a metal zinc sheet, zinc foil, zinc powder, a powdery porous zinc electrode, zinc alloy, or a zinc-based material applied to / deposited on another conductive substrate. The low-temperature electrolyte usesethyl acetate and its derivatives, or quinones or their derivatives as solvents, uses an organic zinc salt or inorganic zinc salt as a solute, and has a concentration of 0.01-10 mol / L. The low-temperature zinc ion battery may allow reversible charging and discharging through cathodic enolization and anode zinc dissolution / precipitation mechanism, and still has high specific capacity, high energy density, long cycle life and excellent power performance at the extreme low temperature (-70 DEG C).

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a zinc ion battery. Background technique [0002] Facing the important problems of energy crisis and environmental pollution, the effective development and utilization of green and clean energy has become a crucial solution. However, renewable energy such as solar energy, wind energy, tidal energy and other new energy sources have discontinuous characteristics, and their effective use requires efficient and recyclable energy storage equipment, which can integrate discontinuous renewable energy into the power grid and energy infrastructure in electrification applications. The development and application of energy storage systems such as rechargeable secondary batteries and capacitors is an effective way to achieve this goal. At present, various types of secondary batteries have been developed, including commercial lead-acid batteries and lithium-ion batteries, whic...

Claims

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Application Information

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IPC IPC(8): H01M4/134H01M4/42H01M4/60H01M10/054H01M10/0569
CPCH01M4/134H01M4/42H01M4/60H01M10/054H01M10/0569H01M2300/0028Y02E60/10
Inventor 王永刚郭昭薇夏永姚
Owner FUDAN UNIV
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