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Tartaric acid metal complex-added anode of nickel hydrogen secondary battery

A technology of metal complexes and secondary batteries, which is applied in the field of electrodes, can solve the problems of low electrode exchange current density, powdering and falling off of active materials, and electrode volume expansion, etc. The effect of internal pressure

Inactive Publication Date: 2010-06-16
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to β-Ni(OH) 2 During the charging process, especially when overcharging, the β-NiOOH will be partially transformed into γ-NiOOH, and the volume of γ-NiOOH is much larger than that of β-NiOOH. Therefore, after multiple charging and discharging cycles, the electrode will produce volume expansion and Distortion will lead to low electrode exchange current density, severe polarization, and active material powdering and falling off.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The tartrate metal complex used in this example is yttrium tartrate complex, which is synthesized by solvothermal method at a temperature of 180° C. using tartaric acid and yttrium oxide as raw materials. The positive electrode of the nickel-hydrogen secondary battery prepared in this embodiment contains 1% yttrium tartrate complex powder, 4% cobalt powder, 3% nickel powder, 0.5% graphite, and spherical β-Ni(OH) 2 . The above mass ratio of yttrium complex powder, cobalt powder, nickel powder, graphite and spherical β-Ni(OH) 2 Mix with each other, add 1% polymethyl methacrylate and 3% polyvinylidene fluoride and mix with water evenly, then coat on foam nickel, after drying, powder cleaning, rolling, spot welding, shear forming and other processes The positive electrode of the battery of the present invention is made.

Embodiment 2

[0024] The metal tartrate complexes used in this example include yttrium tartrate complexes and nickel tartrate complexes. Among them, the yttrium tartrate complex is also synthesized from tartaric acid and yttrium oxide at a temperature of 180°C by hydrothermal method, while the nickel tartrate complex is synthesized from tartaric acid and nickel sulfate at a temperature of 60°C. , synthesized by a solution method. The positive electrode of the nickel-hydrogen secondary battery prepared in this embodiment contains 1% yttrium tartrate complex powder, 6% nickel tartrate complex, 2% cobalt powder, 2% zinc powder, and spherical β-Ni(OH) 2 . The above mass ratio of yttrium complex powder, nickel tartrate complex powder, cobalt powder, zinc powder and spherical β-Ni(OH) 2 Mix with each other, add 0.5% sodium carboxymethyl cellulose and 3% polytetrafluoroethylene and mix with water evenly, and then apply it on the foamed nickel, after drying, powder cleaning, rolling, spot welding...

Embodiment 3

[0026] The metal tartrate complexes used in this example include manganese tartrate complexes and zinc tartrate complexes. Among them, the manganese tartrate complex is synthesized from tartaric acid and manganese chloride by a solution method at a temperature of 60 °C, while the zinc tartrate complex is synthesized from tartaric acid, 1,3-(4-pyridyl)propane (BPP ) and zinc acetate as raw materials, at a temperature of 80 ° C, synthesized by a solution method. The positive electrode of the nickel-hydrogen secondary battery prepared by the present embodiment contains 8% manganese tartrate complex powder, 1.5% zinc tartrate complex, 2% nickel powder, 1.8% acetylene black, and spherical β-Ni(OH) 2 . Manganese tartrate complex powder, zinc tartrate complex powder, nickel powder, acetylene black and spherical β-Ni(OH) 2 Mix with each other, add 0.5% sodium carboxymethyl cellulose, 2.5% vinylidene fluoride and 0.5% polyethylene oxide and mix evenly with water, then apply it on the...

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PUM

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Abstract

The invention relates to a tartaric acid metal complex-added anode of a nickel hydrogen secondary battery, which comprises the following components in percentage by weight: 0.5 to 15 percent of tartaric acid metal complex, 1.0 to 5 percent of binder, 1.0 to 8 percent of conductive agent and the balance of spherical beta-Ni(OH)2. The anode of the nickel hydrogen secondary prepared from the components has the characteristics of high specific capacity, high discharge voltage platform, high oxygen evolution potential, good cyclical stability, safety, no pollution and the like, and can be widely applied to manufacturing nickel hydrogen sealed alkaline secondary batteries with special requirements such as high-rate nickel hydrogen sealed alkaline secondary batteries, high-capacity nickel hydrogen sealed alkaline secondary batteries and high-temperature nickel hydrogen sealed alkaline secondary batteries.

Description

technical field [0001] The invention relates to an electrode used in the technical field of batteries, in particular to a positive electrode of a nickel-hydrogen secondary battery added with a tartrate metal complex. Background technique [0002] Nickel-metal hydride secondary battery is one of the most widely used secondary batteries at present. Its energy density is 1.5 to 2.0 times that of nickel-cadmium batteries, and its volumetric energy density is comparable to that of lithium-ion batteries. Charging and discharging, no environmental pollution. [0003] Nickel-metal hydride secondary batteries mostly use micron-sized spherical β-Ni(OH) 2 For the positive electrode active material. Due to β-Ni(OH) 2 During the charging process, especially when overcharging, the β-NiOOH will be partially transformed into γ-NiOOH, and the volume of γ-NiOOH is much larger than that of β-NiOOH. Therefore, after multiple charging and discharging cycles, the electrode will produce volume ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/24H01M4/62
CPCY02E60/124Y02E60/10
Inventor 吕耀康冯云龙
Owner ZHEJIANG NORMAL UNIVERSITY