Using the composite graphite rods with the sulphide of iron group metals as anode, the double-wall carbon nanotubes have been fabricated by arc discharging under hydrogen atmosphere.
用含有铁族金属硫化物的复合石墨棒作阳极，在氢气氛围下实施电弧放电，制备出了双壁纳米碳管。
The operational principle of the nickel-hydrogen battery and its charging and discharging characteristics and performance index is described here as well as its application status.
阐述了镍-氢电池的工作原理，充、放电特性和性能指标；以及镍-氢电池的特点及应用现状。
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