Journal
ACS ENERGY LETTERS
Volume 1, Issue 4, Pages 719-723Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.6b00300
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Funding
- American Chemical Society Petroleum Research Fund, Grant PRF [55708-DNI10]
- National Science Foundation
- Murdock Charitable Trust
- Oregon Nanoscience and Micro-technologies Institute
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We have demonstrated, for the first time, a polycyclic aromatic hydrocarbon (PAH), crystalline and readily available coronene, exhibits highly reversible anion-storage properties. Conventional graphite anion-insertion electrodes operate at potentials >4.5 V vs Li+/Li, requiring electrolyte additives or the use of ionic liquids as electrolytes. The coronene electrode shows flat plateaus at 4.2 V (charge) and 4.0 V (discharge) in a standard alkyl carbonate electrolyte and delivers a reversible discharge capacity of similar to 40 mA h g(-1). Ex situ characterization reveals that coronene retains its crystalline structure and chemical bonding upon initial PF6- incorporation. Coronene-PF6 electrodes show impressive cycling stability: 92% capacity retention after 960 cycles. The discovery of the reversible anion-storage properties of coronene may open new avenues toward dual-ion batteries based on PAHs as electrodes.
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