Stabilizing the electrode/electrolyte interface is very important for battery performance. Stabilizing the interface of PEO polymer electrolytes with respect to lithium metal is one such electrode/electrolyte system. A new method for stabilizing this interface has been developed using a two-layered, hybrid film. This method utilizes a low-molecular weight PE-b-PEO diblock copolymer having a general chemical formula of H-(CH2)32-(O-CH2CH2)10--OH that can be positioned at the PEO polymer electrolyte surface. This system also has the desirable property of increasing ion conduction by almost three orders of magnitude over a standard PEO polymer electrolyte system. The stabilization of the lithium/polymer electrolyte interface and the increase in ionic conduction has been studied by using ac impedance spectroscopy and AFM phase imaging. The mechanism for stabilization and increased ionic conduction will be discussed.

Stabilization of battery electrode/electrolyte interfaces by hybrid polymer films

251st National Meeting (2016)

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