The
hydrides being developed by the team are protected from oxygen in the air by a porous polymer coating, meaning the fuel is safe to use.
Metal
hydrides are formed by combining metal alloys and hydrogen.
Although nickel metal
hydride batteries have been widely used as a power source for the portable device, it has been replaced by high performance lithium batteries and the amount of production of small, Ni-MH for the portable device has sharply decreased.
The calculated enthalpy and entropy of formation of magnesium
hydride Mg[H.sub.2] are given in Table 2 together with experimental data from the literature.
As a result, the hydrogen
hydride cation should have a strong tendency to donate a proton, without the concerted transfer of an electron.
In early March of this year, Honda began supplying a battery manufacturer with rare earth metals extracted from used nickel-metal
hydride batteries at a JMC plant for reuse in new nickel-metal
hydride batteries of hybrid vehicles.
Honda has been recovering the rare earth metals since April at a plant in Oguni, Yamagata Prefecture, operated by Tokyo-based Japan Metals & Chemicals Co., with which the automaker has developed technology to extract over 80 percent of the metals used in nickel
hydride batteries.