Aqueous electrolyte rechargeable zinc ion battery

A zinc ion battery and electrolyte technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of difficulty in intercalation and extraction of zinc ions, slow speed, etc., and achieve the effects of low price, simple preparation, and simple manufacturing process.

Inactive Publication Date: 2013-01-30
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small lattice constant of manganese dioxide, it is difficult to intercalate and deintercalate zinc ions, resulting in a slow rate of intercalation and deintercalation of zinc ions in the battery during charging / discharging, so that the performance of zinc ion batteries needs to be further improved.

Method used

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  • Aqueous electrolyte rechargeable zinc ion battery
  • Aqueous electrolyte rechargeable zinc ion battery
  • Aqueous electrolyte rechargeable zinc ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Copper ferricyanide KCuFe(CN) 6 preparation of

[0022] Add a certain concentration of copper sulfate (copper chloride, zinc sulfate, zinc chloride, nickel sulfate, nickel chloride, etc.) solution and the same concentration of potassium ferricyanide solution drop by drop into continuously stirring deionized water, and wait After completion, ultrasonically shake the suspension mixed with brown precipitate for 30 minutes, then let it stand for 8 hours, then filter out the precipitate, wash it repeatedly with deionized water, and dry it in an oven to obtain ferricyanide copper powder.

[0023] Copper ferricyanide, electronic conductive graphite powder and binder polyvinylidene fluoride are evenly mixed in a mass ratio of 18:1:1, and then coated on the carbon current collector, cut into a certain size, and dried in an oven A copper ferricyanide electrode sheet was prepared. The single-electrode test uses copper ferricyanide electrode as the working electrode, a metal pla...

Embodiment 2

[0025] Mix zinc powder, electronic conductive agent graphite powder and binder polyvinylidene fluoride in a mass ratio of 18:1:1, coat it on the carbon current collector, cut it into a certain size, and dry it in an oven. Zinc electrode. The copper ferricyanide electrode prepared in Example 1 is the positive pole, the zinc electrode is the negative pole, and the electrolyte is 1mol L -1 ZnSO 4 Aqueous solutions are assembled into soft-packed rechargeable zinc-ion batteries.

[0026] The prepared Zn-ion battery is at 200 mAg -1 For the constant current charge and discharge curve for the first time, see figure 2 (calculated based on the mass of the positive active material), as shown in the figure, a charging platform appears between the voltage range of 2.0~2.2V, and there is an obvious discharging platform at around 0.75V, with a Coulombic efficiency of 81%. The prepared Zn-ion battery is at 200 mAg -1 The constant current charge and discharge cycle curve (calculated bas...

Embodiment 3

[0028] Mix zinc powder, conductive agent graphite powder, binder polyvinylidene fluoride, and corrosion inhibitor copper powder in a mass ratio of 83:8:8:1, coat them on the carbon collector, and dry them in an oven. Cut it into a certain size to make a zinc electrode. The copper ferricyanide electrode prepared in Example 1 is the positive pole, the zinc electrode is the negative pole, and the electrolyte is 1mol L -1 ZnSO 4 Aqueous solutions are assembled into soft-packed rechargeable zinc-ion batteries. The prepared Zn-ion battery is at 150 mA g -1 Constant current charge and discharge curve (calculated based on the mass of the positive electrode active material) see Figure 4 , as shown in the figure, there is a charging platform in the voltage range of 2.1~2.2V, and there is an obvious discharging platform at around 0.75V, and the Coulombic efficiency is 78%. If the structure is optimized, the battery charge and discharge characteristics and cycle stability will be sig...

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Abstract

The invention discloses an aqueous electrolyte rechargeable zinc ion battery, belonging to the technical field of battery preparation. The battery disclosed herein is characterized in that: the cathode active material mainly comprises zinc ions (Zn<2+>)- intercalated and -removed copper (nickel) ferricyanide, the anode active material mainly comprises zinc, and the electrolyte which is liquid or gel comprises soluble salts of zinc as the solute and water as the solvent. According to the invention, the zinc ions can be intercalated in the copper (nickel) ferricyanide cathode material lattices or be removed from the copper (nickel) ferricyanide cathode material lattices, simultaneously the anode material mainly comprising zinc is subject to oxidation or reduction, thus the battery has the characteristics of high specific capacity and rapid charging, and the battery can be widely applied in the fields of portable mobile terminal, equipment, miniature electric vehicle and automobile starting battery, etc.

Description

technical field [0001] The invention belongs to the technical field of battery preparation, and in particular relates to a rechargeable zinc-ion battery with aqueous electrolyte. Background technique [0002] With the rapid development of the global economy, the supply of fossil fuels and environmental issues have become increasingly prominent. Therefore, the comprehensive and efficient development and utilization of new green energy has become a key link to ensure the security of national energy resources and implement the national energy sustainable development strategy. Compared with primary batteries, secondary batteries can repeat charge and discharge cycles many times and can make full use of raw materials, so they are more economical and practical. The most widely used rechargeable battery is the lithium-ion battery. Lithium-ion batteries use lithium ions as an energy storage medium to store electrical energy, and the charging and discharging of the battery is realiz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M10/36
CPCY02E60/12Y02E60/10
Inventor 贾志军王保国宋士强范永生
Owner TSINGHUA UNIV
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