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Alkaline zinc secondary battery and preparation method thereof

A secondary battery, alkaline technology, applied in the field of electrochemistry, can solve the problems of low conductivity and reaction platform, low energy density, poor rate performance, etc., and achieve the effect of low price, high energy density and excellent cycle rate performance

Active Publication Date: 2015-12-30
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline zinc-manganese batteries use transition metal oxides or hydroxides as positive electrode active materials, such as manganese dioxide, nickel oxide, nickel hydroxide, etc., but due to the low conductivity and reaction platform of the metal oxide itself (less than 1.75V) , when applied to zinc secondary batteries, there are defects such as poor rate performance and low energy density, so it is necessary to explore a cathode material system for zinc secondary batteries with better properties

Method used

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  • Alkaline zinc secondary battery and preparation method thereof
  • Alkaline zinc secondary battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of sodium ion battery, comprising the following steps:

[0026] Positive electrode preparation: the positive electrode active material NiS 2 , the conductive agent acetylene black and the binder polytetrafluoroethylene are mixed according to the mass ratio of 8:1:1, and then diluted with water to prepare a positive electrode slurry, which is coated on the stainless steel current collector, dried at 120°C, and compacted. Make a positive pole piece.

[0027] Negative electrode preparation: the negative electrode material Zn 0.1 mn 0.9 , The binder polytetrafluoroethylene is mixed according to the mass ratio of 9:1, and then diluted with water to prepare a negative electrode slurry, which is coated on a stainless steel current collector, dried at 120°C, and compacted to make a positive electrode sheet.

[0028] Preparation of aqueous electrolyte:

[0029] Add 15mL deionized water to a 20mL reagent bottle, add 0.1mol / LKOH+5mmol / LZn(Ac) 2 , stirred ...

Embodiment 2

[0037] Positive electrode preparation: the positive electrode active material NiCo 2 S 4 , the conductive agent acetylene black and the binder sodium alginate are mixed according to the mass ratio of 8:1:1, and then diluted with water to prepare a positive electrode slurry, which is coated on the carbon paper collector, dried at 120 °C, and compacted. Make a positive pole piece.

[0038] Negative electrode preparation: the negative electrode material Zn 0.5 mn 0.5 , The binder polytetrafluoroethylene is mixed according to the mass ratio of 9:1, and then diluted with water to prepare a negative electrode slurry, which is coated on a stainless steel current collector, dried at 120°C, and compacted to make a positive electrode sheet.

[0039] Preparation of aqueous electrolyte:

[0040] Add 15mL deionized water to a 20mL reagent bottle, add 1mol / LKOH+20mmol / LZn(NO 3 ) 2 , stirred into a transparent and homogeneous solution.

[0041] A kind of alkaline zinc secondary batter...

Embodiment 3

[0048] Positive electrode preparation: the positive electrode active material FeS 2 , the conductive agent acetylene black and the binder sodium carboxymethylcellulose are mixed according to the mass ratio of 8:1:1, and then diluted with water to prepare a positive electrode slurry, which is coated on the carbon cloth current collector and dried at 120°C. Compacted to make a positive pole piece.

[0049] Negative electrode preparation: the negative electrode material Zn 0.9 mn 0.1 , The binder polytetrafluoroethylene is mixed according to the mass ratio of 9:1, and then diluted with water to prepare a negative electrode slurry, which is coated on a stainless steel current collector, dried at 120°C, and compacted to make a positive electrode sheet.

[0050] Preparation of aqueous electrolyte:

[0051] Add 15mL deionized water to the 20mL reagent bottle, add 2mol / LKOH+50mmol / LZnSO 4 , stirred into a transparent and homogeneous solution.

[0052] A kind of alkaline zinc second...

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Abstract

The invention discloses an alkaline zinc secondary battery and a preparation method thereof. The alkaline zinc secondary battery comprises a positive pole piece, a negative pole piece, aqueous electrolyte and a diaphragm and is characterized in that a positive pole adopts transition metal sulfide, a negative pole adopts a zinc metal piece, and the electrolyte adopts alkaline aqueous electrolyte containing zinc ions. The transition metal sulfide which is low in cost and simple to synthesize is taken as a cathode material; the assembled aqueous zinc secondary battery has the characteristics of high energy density and excellent rate performance, and requirements of the high-performance zinc secondary battery for the overall performance of the cathode material are met.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and relates to an alkaline zinc secondary battery and a preparation method thereof. Background technique [0002] Due to its high energy density, good designability, and low requirements on the operating environment, lithium-ion secondary batteries have become one of the choices for portable electronic devices at present and even in the future. However, with the rapid development of lithium-ion secondary batteries and Widely used, a new problem follows, that is, the lithium reserves on the earth are limited, and the existing lithium resources will not be able to supply the growing demand for lithium resources for the development of lithium-ion secondary batteries in the future. Therefore, the development of new metal ion secondary batteries that are safe, efficient, environmentally friendly and sustainable, with abundant reserves and low price has become a hot issue in current battery re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/28H01M10/26H01M4/58H01M4/42
CPCH01M4/42H01M4/5815H01M10/26H01M10/28Y02E60/10Y02P70/50
Inventor 崔光磊王天石胡朴赵井文王晓刚徐红霞
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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