Skip to content
1887
Volume 43, Issue 2
  • ISSN: 0032-1400

Abstract

Nickel metal hydride (NiMH) rechargeable battery technology is currently the major competitor to well-established nickel cadmium (NiCad) technology. Due to new legislation in the European Union and elsewhere, NiCad cells are gradually being replaced to reduce the use of toxic cadmium, and NiMH cells are predicted to be a reliable alternative. NiMH batteries provide a higher energy density and are environmentally more acceptable than NiCad cells. In addition they have a low memory effect, allowing easy charging and discharging. However, current NiMH technology has limitations, particularly when cells are rapidly charged/discharged, and the lifetime of a cell is ~ 500 cycles, compared to ~ 1000 cycles for NiCad. Here, we report advances enabling rapid charging/discharging to be achieved by the modification of the surface of the metal hydride alloy with platinum group metals. This enhances the rates of sorption of hydrogen within the alloy, and the alloy is shown to be stable in air. An overview of NiMH battery technology is presented and developments resulting in high performance cells are described.

Loading

Article metrics loading...

/content/journals/10.1595/003214099X4325058
1999-04-01
2024-06-21
Loading full text...

Full text loading...

/content/journals/10.1595/003214099X4325058
Loading
  • Article Type: Research Article
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error