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Hydrogen storage electrode and nickel hydrogen battery

A nickel-metal hydride battery and electrode technology, applied in battery electrodes, battery pack parts, alkaline battery electrodes, etc., can solve the problems of high resistance of current collector leads and low battery output characteristics, and achieve excellent anti-corrosion effect and efficient discharge. characteristics, the effect of excellent charge-discharge cycle characteristics

Inactive Publication Date: 2007-08-29
GS YUASA INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing battery, after the welding of the strip-shaped current collector lead 12 and the inner surface of the sealing plate 0 and the welding of the current collector lead 12 and the upper current collector plate 2 are completed, the cover body will be installed on the side of the battery container 4. The open end is sealed, so the current collector lead 12 must be bent, and the length of the current collector lead connecting the welding point of the current collector lead 12 and the inner surface of the sealing plate 0 and the welding point of the current collector lead 12 and the upper current collector plate 2 is generally As long as 6 to 7 times the distance between the sealing plate 0 and the upper collector plate 2, the resistance of the collector lead itself is large, which is one of the reasons for the low output characteristics of the battery

Method used

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  • Hydrogen storage electrode and nickel hydrogen battery
  • Hydrogen storage electrode and nickel hydrogen battery
  • Hydrogen storage electrode and nickel hydrogen battery

Examples

Experimental program
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Effect test

Embodiment 1

[0132] (Surface modification treatment of hydrogen storage alloy powder)

[0133] (Pretreatment: hydrogen storage)

[0134] Under reduced pressure, 100°C for AB with an average particle size of 30 μm 5 MmNi 3.55 co 0.6 al 0.3 mn 0.35 The composed hydrogen storage alloy was heat-treated for 10 hours, and put into a hydrogen atmosphere with a hydrogen partial pressure of 0.1 MPa and a temperature of 60° C. for 15 minutes to store hydrogen.

[0135] (1st process: dipping treatment)

[0136] Using the NaOH aqueous solution 11 at a temperature of 100° C. and a concentration of 45% by weight as a treatment solution, 1 kg of the hydrogen storage alloy powder after the hydrogen storage treatment above was subjected to an impregnation treatment. The dipping treatment time was 52 minutes. During the immersion treatment, the treatment solution was stirred so that the hydrogen storage alloy powder would not settle. Here, during the immersion treatment, control was performed such t...

Embodiment 2

[0154] A monopolar battery was produced in the same manner as in Example 1 except that in the step of surface modifying the hydrogen storage alloy powder (first step: dipping treatment), the immersion treatment time was set to 1.3 hours, and the discharge capacity was measured. Take this embodiment as embodiment 2.

Embodiment 3

[0156] A monopolar battery was produced in the same manner as in Example 1 except that in the step of surface modifying the hydrogen storage alloy powder (first step: dipping treatment), the immersion treatment time was set to 1.8 hours, and the discharge capacity was measured. Take this embodiment as embodiment 3.

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Abstract

The object of the present invention is to provide a nickel metal-hydride battery excellent in cycle performance, high-rate discharging ability, and output power performance, by utilizing a hydrogen absorbing electrode comprising a hydrogen absorbing alloy powder as an active material, which is excellent in resistance to corrosion and high-rate discharging performance. Provided are a hydrogen absorbing electrode comprising 100 parts by weight of a hydrogen absorbing alloy powder which contains, as a main component, a rare earth element and a transition metal element, and has a saturation mass susceptibility of 1.0 to 6. 5 emu / g, and 0.3 to 1.5 part by weight of an oxide or hydroxide of a rare earth element, the oxide or hydroxide has as a main component one or two or more rare earth elements selected from a group consisting of Dy, Ho, Er, Tm, Yb, and Lu and is in the form of powder whose average diameter is equal to or less than 5 [mu]m, and a nickel metal-hydride battery comprising a nickel electrode as a positive electrode and a hydrogen absorbing electrode as a negative electrode.

Description

technical field [0001] The present invention relates to a hydrogen storage electrode using hydrogen storage alloy powder as an active material and a nickel-metal hydride battery using the electrode, more particularly to a hydrogen storage electrode with excellent cycle characteristics and low-temperature high-efficiency discharge characteristics and improved output characteristics using the electrode, Ni-MH battery with improved cycle life. Background technique [0002] In recent years, there has been a rapid increase in the pursuit of small and lightweight electric devices represented by mobile electronic devices such as mobile computers and digital cameras. As a power source for these devices, sealed nickel-metal hydride batteries have higher energy density per unit volume and unit mass than nickel-cadmium batteries and lead-acid batteries, and are excellent in overcharge resistance and overdischarge resistance, and are widely used as an environmentally friendly power sour...

Claims

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Application Information

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IPC IPC(8): H01M4/24H01M4/38H01M4/62H01M2/26H01M50/534H01M50/538
CPCY02E60/124Y02E60/10
Inventor 坂东寿则坂本晃一森启晃冈部一弥井土秀一
Owner GS YUASA INT LTD
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