Chargeable zinc ion battery

A zinc ion battery, zinc ion technology, applied in battery electrodes, secondary batteries, alkaline batteries, etc., can solve the problems of low coulombic efficiency and limited charging times, and achieve excellent rate performance, long cycle life, and excellent cycle performance. Effect

Active Publication Date: 2009-09-23
SHENZHEN CITY THROUGH SCI & TECH OF NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the secondary alkaline zinc-manganese battery can be charged and discharged, its charging times are limited, its coulombic efficiency is very low, and its capacity decays extremely rapidly, so these factors limit its further application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The manganese dioxide positive electrode material was prepared by microemulsion method, and a certain amount of surfactant sodium bis(2-ethylhexyl)sulfosuccinate (sodium bis(2-ethylhexyl)sulfosuccinate, AOT) was put into isooctane and stirred evenly to form a concentration of 0.1mol / L solution, while stirring, add a certain amount of potassium permanganate aqueous solution with a concentration of 0.1mol / L and make the molar ratio of water and surfactant AOT to 60. After all the addition is complete, continue stirring for 4h. Then carry out suction filtration, filter with water and absolute ethanol for 5 times respectively to obtain a brown filter cake, and dry to obtain black manganese dioxide powder. This material is partially crystallized α-MnO 2 Structure, and contains a certain amount of bound water [Xu Chengjun, Li Baohua, Du Hongda, Kang Feiyu, Zhao Fenggang, Zeng Yuqun, a preparation method of nano manganese dioxide, Chinese patent, application number: 2007100326...

Embodiment 2

[0049] The manganese dioxide electrode prepared in Example 1 is the positive pole, the zinc foil (0.1mm thick) is the negative pole, and the electrolyte is 0.1mol L adjusted to a pH value of 6.2 with NaOH solution -1 ZnSO 4 The aqueous solution is assembled into a button-type zinc-ion battery to obtain a rechargeable zinc-ion battery. The charge-discharge cycle curve of the zinc-ion battery made in embodiment 2 is shown in Figure 7 , the relationship between cycle number and capacity and Coulombic efficiency see Figure 8 .

Embodiment 3

[0051] The preparation process of zinc powder electrode is as follows: zinc powder, conductive agent acetylene black and binder PTFE are mixed according to the mass ratio of 40:50:10, pressed on stainless steel mesh, cut into a certain size, and dried in vacuum. The manganese dioxide electrode prepared in Example 1 is used as the positive electrode, and the zinc powder electrode is used as the negative electrode. The quality of the zinc powder is five times that of the manganese dioxide quality, and the electrolyte is 0.1 mol L with a pH value of 5.0. -1 ZnSO 4 The aqueous solution was assembled into a button-type zinc-ion battery. The charge-discharge cycle curve of the zinc-ion battery obtained in Example 3 is shown in Figure 9 , The initial discharge capacity is 156mAh / g.

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Abstract

The invention discloses a chargeable zinc ion battery, which comprises an anode, a cathode, isolating membrane arranged between the anode and the cathode, and electrolyte which contains the anion and the cation and has ionicconductivity, wherein the cathode adopts active materials which are mainly zinc elements, the active materials of the anode are oxide materials of manganese which can occlude and release zinc ions, the electrolyte is liquid or gel materials with ionicconductivity which adopts the soluble salt of zinc as solute and water as solvent, and the pH value of the electrolyte lies between 3 and 7. The battery has the characteristics of high capacity, chargeable property, long cycle life and the like. Proven by experiments, the chargeable zinc ion battery has excellent rate performance, reversible performance and cycle performance.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a zinc ion battery capable of repeated charging and discharging, in which zinc ions are deintercalated in positive electrode active materials and reduced or oxidized in negative electrodes. Background technique [0002] With the continuous development of the economy, it will inevitably lead to the shortage of oil resources and the pollution of the environment. Therefore, the comprehensive and efficient development and utilization of new green energy has become a very necessary topic. 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 best-known rechargeable battery (secondary battery) is the lithium-ion battery. Lithium-ion batteries use Li + Ions are used as energy storage media to store electrical energy, which utilizes Li +...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M4/36H01M4/38H01M4/50H01M4/02H01M4/48H01M4/56H01M4/52
CPCH01M2300/0005Y02E60/124H01M4/621H01M4/622H01M4/624H01M4/42H01M2300/0002H01M10/24H01M4/50Y02E60/10
Inventor 康飞宇徐成俊李宝华杜鸿达
Owner SHENZHEN CITY THROUGH SCI & TECH OF NEW ENERGY CO LTD
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