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Alkaline zinc-based secondary battery negative electrode material and its preparing method

A secondary battery and negative electrode material technology, which is applied in the direction of alkaline battery electrodes, electrode manufacturing, battery electrodes, etc., and can solve the problems of limited battery performance improvement

Inactive Publication Date: 2006-12-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing solutions focus on adding organic or inorganic additives to electrodes and electrolytes, improving separators, improving charging systems, etc. These methods cannot fundamentally solve the problem of ZnO dissolution, so the improvement of battery performance is limited.

Method used

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  • Alkaline zinc-based secondary battery negative electrode material and its preparing method

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Effect test

Embodiment 1

[0011] Take 10g ZnO and 2.50g SnCl 2 , the SnCl 2 Dissolve in 10g concentrated HCl, stir until completely dissolved, then dilute with distilled water to make SnCl 2 The concentration is 6.5g / L, add ZnO, stir well, filter, wash with distilled water for 3 times, then vacuum dry at 80°C to get Sn 6 o 4 (OH) 4 Surface modified ZnO zinc-based battery material, Sn 6 o 4 (OH) 4 The weight percent content is 27wt.%.

Embodiment 2

[0013] Take 7g ZnO and 1.00g SnCl 2 , the SnCl 2 Dissolve in 5g concentrated HCl, stir until completely dissolved, then dilute with distilled water to make SnCl 2 The concentration is 3.2g / L, add ZnO, stir well, filter, wash with distilled water for 3 times, then vacuum dry at 80°C to get Sn 6 o 4 (OH) 4 Surface modified ZnO zinc-based battery material, Sn 6 o 4 (OH) 4 The weight percent content is 13wt.%.

Embodiment 3

[0015] Take 6g ZnO and 0.25g SnCl 2 , the SnCl 2 Dissolve in 1.25g concentrated HCl, stir until completely dissolved, then dilute with distilled water to make SnCl 2 The concentration is 0.6g / L, add ZnO, stir well, filter, wash with distilled water for 3 times, then vacuum dry at 80°C to get Sn 6 o 4 (OH) 4 Surface modified ZnO zinc-based battery material, Sn 6 o 4 (OH) 4 The weight percent content is 5wt.%.

[0016] To make the negative electrode of alkaline zinc-based secondary battery, in Sn 6 o 4 (OH) 4 Add a small amount of CMC and PTFE binders to the surface-modified ZnO negative electrode material, stir it with water evenly, and then coat it on the nickel foam of the current collector. After drying, pressing, and shearing, the size is: 20×20×0.4mm 3 . The positive electrode is Ni(OH) formed by scraping and pressing on nickel foam 2 electrode. The capacity of the positive electrode is three times that of the negative electrode, so that the battery capacity c...

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PUM

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Abstract

The disclosed preparation method for Sn6O4(OH)4 surface-modified ZnO battery cathode material comprises: selecting SnCl2 and ZnO by mass ratio as 1-30%, solving SnCl2 into strong HCl with mass at least as one time of the SnCl2 completely, diluting with distilled water to adjust SnCl2 concentration in 0.1-10g / L; adding ZnO to stir and filter, cleaning, and drying. This invention is simple ns reliable, and has high utility on ZnO and fit to wide application.

Description

technical field [0001] The invention relates to an alkaline zinc-based secondary battery negative electrode material and a preparation method thereof. Background technique [0002] Alkaline zinc-based secondary batteries use zinc oxide (ZnO) as the negative electrode material, nickel hydroxide (Ni(OH) 2 ), manganese oxide (MnO 2 ), silver oxide (AgO) or air as the positive electrode material of the green rechargeable battery. However, the cycle life of the alkaline zinc-based secondary battery is too short to meet the practical requirements, so that this battery has not been widely used. The short cycle life is mainly due to the deformation and dendrite problems of the Zn electrode. Since ZnO dissolves greatly in alkaline solution, when the battery is working, ZnO, the discharge product of the zinc electrode, will be partially dissolved in the electrolyte, and cannot be deposited at the dissolution position during charging, resulting in electrode deformation and a decreas...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/24H01M4/04C01G9/00
CPCY02E60/124Y02E60/10
Inventor 涂江平袁永锋吴惠明王秀丽杨友志
Owner ZHEJIANG UNIV
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