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Large-capacity double-bag type iron-nickel battery

An iron-nickel battery, double-pocket technology, applied in the field of large-capacity double-pocket iron-nickel batteries, can solve the problems of short cycle life, poor rate performance, and low specific energy, and achieve long cycle life, capacity performance and rate performance Excellent, low internal resistance effect

Active Publication Date: 2018-10-19
河南省恒明新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low specific energy, poor rate performance, short cycle life and high cost existing in the current iron-nickel battery, the present invention provides a large-capacity double-pocket iron-nickel battery for meeting the requirements of the energy storage field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] [Ni 0.8 Al 0.2 co 0.05 (OH) 2 ]·[(BO 2 - ) z mH 2O] Preparation of positive electrode active material:

[0022] First, the nickel chloride compound is made into a nickel salt solution with a molar concentration of 1.8mol / L with deionized water that removes carbon dioxide, and aluminum sulfate and cobalt sulfate are dissolved in a ratio of 0.8:0.2:0.05 in the molar ratio of nickel, aluminum and cobalt elements. In the sodium hydroxide solution with a molar concentration of 4mol / L, under the protection of inert gas nitrogen, slowly add the nickel salt solution dropwise into the reaction kettle equipped with the composite alkaline solution, the reaction temperature is 55 ° C, and the final reaction of the mixture is completed. pH=10.5, after the reaction is completed, age the mother liquor at 55°C for 36 hours, then filter; dry the filter cake at 125°C for 2 hours, and grind it into powder, pass through a 200-mesh sieve for later use, transfer 8g of the obtained pow...

Embodiment 2

[0031] [Ni 0.9 Al 0.1 Ca 0.05 (OH) 2 ]·[(CO 3 2- ) z mH 2 O] Preparation of positive electrode active material:

[0032] Firstly, nickel sulfate is made into a nickel salt solution with a molar concentration of 2.0mol / L with deionized water, and aluminum sulfate and calcium chloride are dissolved in a molar ratio of 0.9:0.1:0.05 with a molar concentration of 5mol. / L of sodium hydroxide solution, slowly drop the nickel salt solution into the reaction kettle equipped with the composite alkaline solution, the reaction temperature is 55°C, the pH of the final reaction mixture is 10.5, after the reaction is completed, the The mother liquor was aged for 36 hours under the conditions, and then filtered; the filter cake was dried at 125°C for 1 hour, and ground into powder, and passed through a 200-mesh sieve to obtain Ni 0.9 Al 0.1 Ca 0.05 (OH) 2 ]·[(CO 3 2- ) z mH 2 O powder samples.

[0033] will Ni 0.9 Al 0.1 Ca 0.05 (OH) 2 ]·[(CO 3 2- ) z mH 2 O adopts th...

Embodiment 3

[0041] [Ni 0.7 Al 0.3 Y 0.05 (OH) 2 ]·[(Cl - ) z mH 2 O] Preparation of positive electrode active material:

[0042] First, the nickel chloride compound is made into a nickel salt solution with a molar concentration of 2.0 mol / L with deionized water that removes carbon dioxide, and the ratio of aluminum chloride and yttrium chloride to the molar ratio of nickel, aluminum, and yttrium is 0.7:0.3:0.05 Dissolve it in a sodium hydroxide solution with a molar concentration of 3mol / L. Under the protection of inert gas nitrogen, slowly add the nickel salt solution dropwise into the reaction kettle equipped with a composite alkaline solution. The reaction temperature is 60°C, and the final reaction is completed. The pH of the mixture is 11. After the reaction is completed, the mother liquor is aged at 70°C for 48h, and then filtered; the filter cake is dried at 125°C for 2h, and ground into powder to obtain [Ni 0.7 Al 0.3 Y 0.05 (OH) 2 ]·[(Cl - ) z mH 2 O] Powder samples....

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Abstract

The invention discloses a large-capacity double-bag type iron-nickel battery. A battery pole plate is composed of a bag type nickel positive pole plate, a bag type iron negative pole plate and a multilayered composite diaphragm or isolation grid located between the bag type nickel positive pole plate and the bag type iron negative pole plate; an electrode material of the bag type nickel positive pole plate is composed of a positive pole active material, a conducting agent, an additive and a binding agent; an electrode material of the bag type iron negative pole plate is composed of iron-basedoxide powder, a conducting agent, an additive and a binding agent; electrolyte is an alkaline solution which is at a barren liquor state and contains the additive. According to the large-capacity double-bag type iron-nickel battery disclosed by the invention, a formula of positive and negative poles is optimized, a formula of the electrolyte is optimized and a battery structure is adjusted, so that the charging and discharging performance, and circulating performance of the novel iron-nickel battery are improved; furthermore, the battery also has the advantages of high charging and dischargingvoltage platform, good over-charging and over-discharging resisting performance, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of iron-nickel batteries, in particular to a large-capacity double-pocket iron-nickel battery for industrial application. Background technique [0002] As we all know, large-capacity pouch batteries have good cycle stability due to the pouch positive and negative plates with high mechanical strength and surplus electrolyte. Large-capacity nickel-cadmium pouch batteries have the characteristics of safety, durability, and long cycle life. They have been widely used in industrial fields such as railway locomotives, mines, armored vehicles, and aircraft engines as starting or emergency power supplies. However, the development of nickel-cadmium secondary batteries is greatly restricted due to the pollution of cadmium electrodes. The larger the battery capacity, the more potential safety hazards. The preparation of large-capacity lithium-ion batteries for rail transit and other important social fields will have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/28H01M10/30
CPCH01M10/28H01M10/30Y02E60/10Y02P70/50
Inventor 上官恩波段玉兰刘志刚李长海郭振龙
Owner 河南省恒明新能源有限公司
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