Environmental concerns over limited fossil fuels resources, in conjunction with energy security needs have increased the importance of wind and solar renewable technologies in the electrical energy landscape. Since renewable energy sources are intermittent, integration with the grid requires robust energy storage solutions to tailor power generation and supply to demand. Novel materials need to be developed to address some of the limitations of existing electrochemical technologies: modest cycle life and efficiency (lead acid batteries), low charging rates and efficiency (Na-S, Na-metal halide), and prohibitive costs (Li-ion batteries). Here we describe a methodology to successfully fabricate metal-organic frameworks (MOFs)-based coin cells batteries capable to run over hundreds of cycles. The talk will focus on the materials synthesis, characterization, and electrochemical testing. Ex-situ investigations of the cycled electrodes were used to identify the charging mechanism and correlate the structure-property relationship in these systems. Complementary electrochemical tests in aqueous 3-electrode configurations will also be presented, as water meets the cost and safety requirements over extended use needed in large-scale energy storage. Finally, ongoing efforts to develop novel MOFs materials for higher energy density via multielectron transfer arising from both metal and redox-active custom-made organic ligands will be highlighted in this talk. Sandia National Laboratories is a multi-program lab managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the US DOE’s NNSA under contract DE-AC04-94AL85000.

Electrochemical investigation of MOFs as intercalation materials for batteries

251st National Meeting (2016)

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