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Nickel–metal hydride: NiMH Ni-MH Metal hydride: KOH Yes 1990 [1] 0.9–1.05 [27] 1.2 [11] ... See Lithium-ion battery § Negative electrode for alternative ...
Lithium-ion batteries can deliver extremely high power and have a higher specific energy than nickel–metal hydride batteries, [40] but they were originally significantly more expensive. [41] The cost of lithium batteries fell drastically during the 2010s and many small consumer devices now have non-consumer-replaceable lithium batteries as a ...
The current trend in the industry is towards the development of lithium-ion (Li-Ion) technology to replace NiMH in electric vehicles. In 2009, Toyota tested lithium batteries as a potential replacement for the nickel metal hydride batteries used in its Prius model gasoline-electric hybrid.
A nickel–hydrogen battery (NiH 2 or Ni–H 2) is a rechargeable electrochemical power source based on nickel and hydrogen. [5] It differs from a nickel–metal hydride (NiMH) battery by the use of hydrogen in gaseous form, stored in a pressurized cell at up to 1200 psi (82.7 bar ) pressure. [ 6 ]
When used properly, nickel–metal hydride batteries can have exceptionally long lives, as has been demonstrated in their use in hybrid cars and in the surviving first-generation NiMH Toyota RAV4 EVs that still operate well after 100,000 miles (160,000 km) and over a decade of service. Downsides include finicky charge cycles and poor ...
However, newer low self-discharge nickel–metal hydride (NiMH) batteries and modern lithium designs display a lower self-discharge rate (but still higher than for primary batteries). The active material on the battery plates changes chemical composition on each charge and discharge cycle; active material may be lost due to physical changes of ...