Magnetron sputtering deposition of TiO₂ particles on polypropylene separators for lithium-ion batteries
2015
Magnetron sputtering deposition (MSD) of TiO₂ is applied on a porous polypropylene (PP) separator for lithium ion batteries. The surface morphology, contact angles, thermal properties, and electrolyte uptake of the modified separators are characterized and the electrochemical performances such as ionic conductivity, cycle performance, and high rate discharge capacity are investigated. The TiO₂ MSD-coated separators present suppressed thermal shrinkage which may lead to improved safety of the batteries, and show improvement in wettability with polar electrolytes and cell performance as compared to the bare PP separator.
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