Toward a Four-Electron Redox Quinone Polymer for High Capacity Lithium Ion Storage

Aaron Petronico, Kimberly L. Bassett, Bruno G. Nicolau, Andrew A. Gewirth, Ralph G. Nuzzo

Research output: Contribution to journalArticle

Abstract

Despite recent advances, current polymeric organic cathode materials have failed to incorporate a high degree of lithium storage in a small molecular framework, resulting in low capacities relative to monomers. This report discloses the development of a lithium salt polymer of dihydroxyanthraquinone (LiDHAQS) capable of storing four Li+ per monomer. The combination of storing four Li+ per monomer and a low molecular weight monomer results in a capacity of 330 mA h g−1, a record for this class of material. The additional redox events responsible for added Li+ storage occur between 3.0 and 3.6 V versus Li/Li+ resulting in an average discharge potential of 2.5 V versus Li/Li+. These metrics combined yield a high energy density of 825 W h kg−1 which is a 55% improvement over commercial lithium cobalt oxide. The high performance of LiDHAQS makes it a promising material for next generation Li+ cathodes.

Original languageEnglish (US)
Article number1700960
JournalAdvanced Energy Materials
Volume8
Issue number5
DOIs
StatePublished - Feb 15 2018

Keywords

  • batteries
  • cathodes
  • lithium
  • polymer
  • quinone

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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