Improving the Performance of Organic Cathode Materials in Li-ion Batteries through Secondary Interactions
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Date
2019-03
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Abstract
Modern society relies heavily on lithium-ion batteries (LIBs) to power every-day devices such as portable laptops, cell phones, and increasingly, electric vehicles. The cathode materials employed by traditional LIBs, however, have limited rate capabilities and contain transition-metals, such as Co and Ni, which are unsustainable in both their natural abundance and mining practices. If the dependence of LIBs on unsustainable metals continues, the volatile world metal market will inevitably place a restrictive limitation on battery development. In the past decade, rechargeable batteries containing organic-based cathode materials (OCMs) have emerged as an attractive alternative to transition-metal-based cathodes, as many low molecular weight organic molecules have high theoretical capacities and can be synthesized from abundant materials. Unfortunately, OCMs often suffer from low conductivity and dissolution into electrolyte, adversely affecting their charging rates and cycle stability and ultimately limiting their development in next generation energy storage devices. To address these limitations, we propose utilizing intermolecular secondary interactions to significantly increase the conductivity and capacity retention in solid state organic materials.
Description
Mathematical and Physical Sciences: 1st Place (The Ohio State University Edward F. Hayes Graduate Research Forum)
Keywords
lithium-ion, secondary interactions, organic cathode