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Published on: November 11, 2013
Cage Effect of Nitrogen Oxide Radicals Enables Li-NOx Cell with a 3.8 V Cell Voltage
Jaehyun Park1, Weiyao Zhang1, Shiyu Zhang1
1Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio, 43210, USA.
Abstract:
The utilization of redox-active gas as cathode materials has been proposed as a promising approach to meet the demand for next-generation battery technologies. Toward this end, nitrogen oxides (NOx)-inexpensive, abundant gases readily produced from ammonia on an industrial scale-is a promising energy storage media; however, its utilization as cathode material has not been achieved. In this work, the cage effect of NO and NO2 radicals are utilized to stabilize the charge product of Li-NOx cell as N2O3. This cell operates via reversible redox of LiNO3 to N2O3, achieving a specific capacity of 1,570 mA h gcarbon -1 or 25 mA h cmelectrode -2 at a full cell voltage of 3.85 V with an average energy efficiency of 89% at a current density up to 2 mA cmelectrode -2. These metrics represent one of the highest areal capacity, current density, cell voltage, and energy efficiency reported for a metal-gas cells.
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