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Hydrogen storage alloy electrode for nickel-metal hydride battery

A hydrogen storage alloy and nickel-hydrogen battery technology, applied in the field of electrochemistry, can solve the problems of reduced overall performance, high internal pressure, reduced Ni-MH battery charge and discharge performance, cycle performance, etc., to achieve improved alkali resistance and high discharge The effect of capacity

Inactive Publication Date: 2012-09-19
SHANGHAI YAOYU INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ni-MH batteries have a high internal pressure in the late stage of charge and discharge, especially during overcharge, which reduces the charge and discharge performance and cycle performance of Ni-MH batteries, and greatly reduces its overall performance.

Method used

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  • Hydrogen storage alloy electrode for nickel-metal hydride battery
  • Hydrogen storage alloy electrode for nickel-metal hydride battery
  • Hydrogen storage alloy electrode for nickel-metal hydride battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A hydrogen storage alloy electrode for a nickel-hydrogen battery, which is prepared as follows:

[0028] a. Pulping: LaNi with a weight ratio of 100:0.2:16 5 h 6 The hydrogen storage alloy powder, the iron phthalocyanine additive and the mixed binder are fully mixed and evenly obtained to obtain the negative electrode slurry;

[0029] b. Evenly coat the mixed negative electrode slurry on the negative electrode current collector (nickel-plated steel strip), put it in a vacuum drying oven, and dry at 70°C for 8 hours;

[0030] c. After rolling the dried pole piece to a thickness of 0.5mm, cut it to 80mm×40mm.

[0031] The mixed binder is 2wt% HPMC and 50wt% SBR, and the weight ratio of the two is 3:1.

[0032] The iron phthalocyanine is prepared by the following method:

[0033] a, phthalic anhydride, urea, (NH 4 ) 2 MoO 4 , mix well, heat up to 220°C, add FeCl 2 4H 2 O, react to get crude product; Described phthalic anhydride, urea, (NH 4 ) 2 MoO 4 , FeCl 2 ...

Embodiment 2

[0036] A hydrogen storage alloy electrode for a nickel-hydrogen battery, which is prepared as follows:

[0037] a. Pulping: LaNi with a weight ratio of 100:0.2:16 5 h 6 The hydrogen storage alloy powder, the iron phthalocyanine additive and the mixed binder are fully mixed and evenly obtained to obtain the negative electrode slurry;

[0038] b. Evenly coat the mixed negative electrode slurry on the negative electrode current collector (nickel-plated steel strip), put it in a vacuum drying oven, and dry at 70°C for 8 hours;

[0039] c. After rolling the dried pole piece to a thickness of 0.5mm, cut it to 80mm×40mm.

[0040] The mixed binder is 2wt% HPMC and 50wt% SBR, and the weight ratio of the two is 3:1.

[0041] The LaNi 5 h 6 The hydrogen storage alloy powder is LaNi coated with cobalt 5 h 6 Hydrogen storage alloy powder.

[0042] The iron phthalocyanine is prepared by the following method:

[0043] a, phthalic anhydride, urea, (NH 4 ) 2 MoO 4 , mix well, heat ...

Embodiment 3

[0046] A hydrogen storage alloy electrode for a nickel-hydrogen battery, which is prepared as follows:

[0047] a. Pulping: LaNi with a weight ratio of 100:0.1:15 5 h 6 The hydrogen storage alloy powder, the iron phthalocyanine additive and the mixed binder are fully mixed and evenly obtained to obtain the negative electrode slurry;

[0048] b. Evenly coat the mixed negative electrode slurry on the negative electrode current collector (nickel-plated steel strip), put it in a vacuum drying oven, and dry at 70°C for 8 hours;

[0049] c. After rolling the dried pole piece to a thickness of 0.5mm, cut it to 80mm×40mm.

[0050] The mixed binder is 2wt% HPMC and 50wt% SBR, and the weight ratio of the two is 2:1.

[0051] The LaNi 5 h 6 The hydrogen storage alloy powder is LaNi coated with cobalt 5 h 6 Hydrogen storage alloy powder.

[0052] The iron phthalocyanine is prepared by the following method:

[0053] a, phthalic anhydride, urea, (NH 4 ) 2 MoO 4 , mix well, heat ...

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Abstract

The invention discloses a hydrogen storage alloy electrode for a nickel-metal hydride battery. The hydrogen storage alloy electrode comprises a cathode collector and a cathode active substance slurry coated on the cathode collector, wherein the cathode active substance is composed of LaNi5H6 hydrogen storage alloy powder, iron phthalocyanine additive and mixed adhesive at a weight ratio of 100:(0.1-1.0):(15-20); the mixed adhesive is composed of HPMC (Hydroxy Propyl Methyl Cellulose) with a weight percentage concentration of 2% and SBR (Styrene Butadiene Rubber) with a weight percentage concentration of 50%; the weight ratio of HPMC to SBR is (2-5):1; and the LaNi5H6 hydrogen storage alloy powder is cobalt-cladding LaNi5H6 hydrogen storage alloy powder. Compared with the prior art, the hydrogen storage alloy electrode for the nickel-metal hydride (Ni-MH) battery provided by the invention has the advantages that the inner voltage of the battery is obviously reduced, the discharge capacity is higher and the overcharging resistance and the cycle performance are excellent.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a hydrogen storage alloy electrode for a nickel-hydrogen battery. Background technique [0002] In 1984, the Netherlands Philips company solved LaNi 5 The capacity fading problem of the alloy during the charge and discharge process makes LaNi 5 Alloy has become a new type of negative electrode material, and the positive electrode material Ni(OH) 2 Invent MH / Ni battery on the basis of matching. In 1990, Japan first realized the industrialization of MH / Ni batteries. [0003] At present, the battery industry is developing very rapidly. Ni-MH batteries have developed rapidly due to their excellent properties such as green, pollution-free, and no memory effect. However, with the further development of society, electronic equipment puts forward higher requirements on the battery performance of Ni-MH batteries. In the late stage of charging and discharging of Ni-MH batteries, especi...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/24
CPCY02E60/124Y02E60/10
Inventor 不公告发明人
Owner SHANGHAI YAOYU INDAL
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