Layered oxides, such as lithium cobalt oxide, are commonly used as cathode materials in lithium-ion batteries, however repeated lithium insertion and extraction can cause stress and mechanical fracture, leading to capacity fade. Here we report the chemical intercalation of Al13 Keggin ions between layers in V2O5 xerogels. The hypothesis driving this research was that the pillars will stabilize the layered structure, reducing strain induced fracture and improving the rate capacity and cycle life performance. Discharge capacities for the pillared materials were nearly twice as high as those for the unpillared material. The capacity retention and rate capabilities were also enhanced. These and other results regarding the chemical, thermal, and physical characterization of the materials will be described.

Pillared layered oxides for enhanced lithium intercalation

256th National Meeting (2018)

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