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Sealed nickel cadmium and nickel metal hydride cell advances

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1 Author(s)
Powers, R.A. ; Powers Assoc., Westlake, OH, USA

Nickel cadmium cells have almost doubled in capacity since 1980 after being stagnated in performance for twenty years. Nickel metal hydride cells, introduced in 1992, have shown a 170 percent increase in energy density to be competitive on a volume basis with lithium ion. Other characteristics, such as charge retention, charge rate, high temperature operation, and rate capability have also advanced with improvements in materials and constructions. These two cell types account for roughly one half of the value of the small secondary battery market

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Aerospace and Electronic Systems Magazine, IEEE  (Volume:15 ,  Issue: 12 )