Cylindrical nickel metal hydride(Ni-MH) battery with high specific volume capacity was prepared by using the oxyhydroxide Ni(OH)

2

and AB5 type hydrogen storage alloy and adjusting the designing parameters of positive and negative electrodes.The oxyhydroxide Ni(OH)

2

was synthesized by oxidizing spherical β-Ni(OH)

2

with chemical method.The X-ray diffraction(XRD) patterns and the Fourier transform infrared(FT-IR) spectra indicated thatγ-NiOOH was formed on the oxyhydroxide Ni(OH)

2

powders

and some H

2

O molecules were inserted into their crystal lattice spacing.The battery capacity could not be improved when the oxyhydroxide Ni(OH)

2

sample was directly used as the positive active materials.However

based on the conductance and residual capacity of the oxyhydroxide Ni(OH)

2

powders

AAsize Ni-MH battery with 2560 mA·h capacity and 407 W·h·L

-1

specific volume energy at 0.2C was obtained by using the commercial spherical β-Ni(OH)

2

and AB5-type hydrogen-storage alloy powders as the active materials when 10% mass amount of the oxyhydroxide Ni(OH)

2

with 2.50 valence was added to the positive active materials and subsequently the battery designing parameters were adjusted as well.The as-prepared battery showed 70% initial capacity after 80 cycles at 0.5C.The possibility for adjusting the capacity ratio of positive and negative electrodes from 1:1.35 to 1:1.22 was demonstrated

preliminarily.It is considered the as-prepared battery can meet the requirement of some special portable electrical instruments.