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PolyPlus Battery Company has installed a pilot manufacturing line for producing Lithium Seawater Batteries (Li/SWBs) for subsea and deep ocean applications.
These batteries have energy density of 2000 Wh/kg and >1500 Wh/l. The manufacturing line is operational at PolyPlus’ facility in Berkeley, California.
Lithium seawater batteries provide key advantages over other primary batteries (such as lithium thionyl chloride) including a 10X increase in energy density along with inherent safety. This technology is based on water-stable Protected Lithium Electrodes (PLEs) invented by PolyPlus that enable the construction of pressure tolerant batteries, having zero self-discharge, and exceptional energy density.
Lithium/seawater batteries built by PolyPlus do not require a pressure housing, which degrades the energy density of conventional batteries, and accordingly Li/SWBs deliver extremely high energy density in practice. They are also safe for use and storage on maritime vessels, vehicles and aircraft.
PolyPlus lithium seawater battery can be arranged in a number of geometric formats, including a tubular stacking of individual cells with a total battery energy that is readily customized (e.g., from 100 Wh to > 10 kWh).
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