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Li-ion technologies based on
Lithiated Mixed Metal Oxide cell chemistry and liquid electrolytes have evolved
from a research interest in the late 1980's to an industry with $10 billion in sales alone for 2006. This expansion has been fueled by the improved perform-ance
possible with the Li-ion technology relative to alternatives such as the NiCd
(Nickel-Cadmium) or NiMH (Nickel-Metal Hydride) cell chemistries. Li-ion cells
offer better specific energy, energy density and energy efficiency than the NiCd,
NiMH or Ni-H2 cell chemistries. Of particular interest to satellite
applications, Li-ion cells offer double the specific energy and over three times
the energy density of Ni-H2 systems while providing higher energy
efficiency. Higher specific energy permits lighter-weight spacecraft and higher
energy density permits smaller spacecraft. Further, as the price of Li-ion
cells has dropped, the technology has been applied in a broader range of
applications from medical implant devices to UAVs to Electric Vehicles. The
success of the technology in these applications substantiates the commercial and
military viability of the system. |
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