Thursday, 1 June 2017: 14:20
Grand Salon D - Section 21 (Hilton New Orleans Riverside)
The rechargeable nonaqueous Li-O2 battery holds promise to a perfect substitutes for lithium-ion battery for the theoretically high specific energy density (∼3505 Wh·kg-1). 1However, the great challenges facing the Li-O2 battery is still left so far. One of which is a huge energy loss for achieving a reversible Li-O2 electrochemical process, oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) kinetics are critical to the realization of highly efficient lithium-oxygen batteries. 2, 3Rational design of bifunctional catalysts with fast oxygen reduction reaction (ORR) and oxygen reduction reaction (ORR) are valid to work out current problems.4
Here, we first exploit a particular structure of RuO2 nanoparticle and NiCo2O4 nanosheet composite, which RuO2 nanoparticle is uniformly coated on the surface of NiCo2O4 by a simple solution method. We demonstrate that the special design of RuO2/NiCo2O4 nanosheet composite provide excellent bifunctional electrocatalytic activities in Lithium-O2 battery. The air electrodes using RuO2/NiCo2O4 composite show enhanced overpotential characteristics and stable cyclability in our study, demonstrating high potential as efficient OER and ORR catalysts.
Here, we first exploit a particular structure of RuO2 nanoparticle and NiCo2O4 nanosheet composite, which RuO2 nanoparticle is uniformly coated on the surface of NiCo2O4 by a simple solution method. We demonstrate that the special design of RuO2/NiCo2O4 nanosheet composite provide excellent bifunctional electrocatalytic activities in Lithium-O2 battery. The air electrodes using RuO2/NiCo2O4 composite show enhanced overpotential characteristics and stable cyclability in our study, demonstrating high potential as efficient OER and ORR catalysts.
Referrences
1. D. Xu, Z. L. Wang, J. J. Xu, L. L. Zhang and X. B. Zhang, Chemical communications, 48, 6948 (2012).
2. B. D. McCloskey, A. Speidel, R. Scheffler, D. C. Miller, V. Viswanathan, J. S. Hummelshoj, J. K. Norskov and A. C. Luntz, The journal of physical chemistry letters, 3, 997 (2012).
3. S. S. Zhang, D. Foster and J. Read, Journal of Power Sources, 195, 1235 (2010).
4. V. Viswanathan, K. S. Thygesen, J. S. Hummelshoj, J. K. Norskov, G. Girishkumar, B. D. McCloskey and A. C. Luntz, The Journal of chemical physics, 135, 214704 (2011).