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Applying method of zinc electrode additive in zinc and nickel secondary battery

An application method and secondary battery technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problem of low specific discharge capacity, failure to meet the needs of zinc-nickel secondary batteries, and failure to improve the cycle performance of zinc negative electrodes, etc. question

Inactive Publication Date: 2015-01-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these additives still have not been able to improve the cycle performance of the zinc anode.
[0005] In patent document 201110167284.X, an anionic zinc-based hydrotalcite is directly used as a zinc negative electrode active material. Although its cycle performance is improved, its specific discharge capacity is low, which cannot meet the market demand for zinc-nickel secondary batteries.

Method used

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  • Applying method of zinc electrode additive in zinc and nickel secondary battery
  • Applying method of zinc electrode additive in zinc and nickel secondary battery
  • Applying method of zinc electrode additive in zinc and nickel secondary battery

Examples

Experimental program
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Effect test

Embodiment 1

[0033]36 parts by mass of analytically pure zinc nitrate hexahydrate and 10 parts by mass of analytically pure aluminum nitrate nonahydrate were dissolved in 100 parts by mass of deionized water, and 1.5 parts by mass of analytically pure tin dichloride was dissolved in 50 parts by mass of In dilute hydrochloric acid (0.1%), the above two solutions were mixed uniformly to form a salt solution. 3.2 parts by mass of sodium hydroxide and 2.12 parts by mass of sodium carbonate were dissolved in 50 parts by mass of deionized water to form an alkaline solution. Under strong mechanical stirring, drop the salt solution and alkali solution into a three-necked bottle filled with 50 parts by mass of deionized water under the protection of an inert gas at a rate of one drop per second, control the pH of the solution to 10.0, and continue stirring for 60 minutes , hydrothermal reaction at 120°C for 12h, and finally filter, wash the precipitate, and dry at 60°C for 12h to obtain the carbona...

Embodiment 2

[0036] The zinc-tin-aluminum ternary hydrotalcite additive 1.2g that embodiment 1 obtains, zinc oxide 2.8g, acetylene 0.5g, zinc powder 0.5g are ground in mortar and mix and obtain negative electrode material mixture; Sodium dialkylbenzene sulfonate was dissolved in 1ml deionized water, and the resulting solution was added dropwise to the negative electrode material mixture; 0.05g binder polyvinylidene fluoride was dissolved in 6ml deionized water, and the resulting solution was added dropwise to the negative electrode material mixture Then continue to grind to a uniform slurry; roll the slurry and the glass plate into a thin sheet with a uniform thickness with a glass rod, cut it into a 1cm×1cm square piece with a blade, clamp it on a 2cm×10cm copper mesh current collector, and press it The zinc negative electrode is made, and the positive electrode is a sintered nickel positive electrode sheet with a size of 5cm×5cm. The positive and negative electrodes are respectively clamp...

Embodiment 3

[0038] The zinc-tin-aluminum ternary hydrotalcite additive 1.5g that embodiment 1 obtains, zinc oxide 2.5g, acetylene black 0.5g, zinc powder 0.5g are ground and mixed in a mortar to obtain the negative electrode material mixture; 0.1g Sodium dodecylbenzene sulfonate was dissolved in 1ml deionized water, and the resulting solution was added dropwise to the negative electrode material mixture; 0.05g binder polyvinylidene fluoride was dissolved in 6ml deionized water, and the resulting solution was added dropwise to the negative electrode material Then continue grinding to a uniform slurry; roll the slurry and the glass plate into a thin sheet with a uniform thickness with a glass rod, cut it into a 1cm×1cm square piece with a blade, clamp it on a 2cm×10cm copper mesh current collector and press it Zinc negative electrode is made of sheet, the positive electrode adopts sintered nickel positive electrode sheet with the size specification of 5cm×5cm, the positive and negative elect...

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Abstract

The invention discloses application of a zinc electrode additive in a zinc and nickel secondary battery. By means of application, deformation and dendritic crystals of zinc oxide can be improved, and other properties of conductivity, electrical resistivity, deposition form, deposition rate and the like are improved. Meanwhile, the problems of deformation, dendritic crystal and poor cyclic property of zinc oxide and low specific discharge capacity of anionic zinc-based hydrotalcite are solved. By means of the application, good cyclic property and high specific discharge capacity can be simultaneously obtained, and the marketization of the zinc and nickel secondary battery is facilitated.

Description

technical field [0001] The invention relates to an application method of a zinc negative electrode additive in a zinc-nickel secondary battery. Background technique [0002] Alkaline zinc-nickel secondary batteries have the characteristics of large specific energy, high specific power, stable working voltage and low price. However, the deformation and dendrites of the active material Zn are mainly caused by the dissolution of the active material in the alkaline electrolyte, for example, during the charging process, the deposition of the active material Zn is not uniform, which leads to the formation of the current density gradient, This causes deformation and dendrites of zinc. [0003] Aiming at this problem, people have done a lot of research on the improvement of zinc anode. Adding additives to the zinc anode is an important way to improve the electrochemical performance of the electrode. At present, there are three main types of additives commonly used and being studi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/36
CPCH01M4/364H01M4/48H01M4/62H01M4/626Y02E60/10
Inventor 杨占红冯召宾张政王婷婷
Owner CENT SOUTH UNIV
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