Co-N-Doped Carbon as an Efficient Catalyst for Lithium–Oxygen Batteries

Abstract

Lithium–oxygen batteries have received much research attention, and the issue of high overpotential of lithium–oxygen batteries is pivotal to be resolved. Developing efficient electrocatalysts is considered to be a feasible way. Here, we prepared Co and N co-doped carbon material from ZIF-8 via a two-step route, in which Co is atomically dispersed into the ZIF-8-derived N-doped carbon matrix. This obtained single atom Co–N–C catalyst was applied as an efficient catalyst for the lithium–oxygen battery. The Co–N–C cathode lithium–oxygen battery can deliver a high platform of 2.7 V during discharge, and the charging platform is below 4 V. Co-N-doped carbon can improve the work function of the carbon material, effectively reduce overpotential of both oxygen reduction reaction and oxygen evolution reaction, and thus improve the performance of the lithium–oxygen battery.

Graphene‐Supported Atomically Dispersed Metals as Bifunctional Catalysts for Next‐Generation Batteries Based on Conversion Reactions

“…The high bifunctional activity of CoN 4 active sites has also been confirmed in other studies. [90][91][92] In addition, G-ADMCs with RuN 4…”

Enhanced Performance of Aprotic Electrolyte Li–O2 Batteries with SnS2–SnO2/C Heterostructure as Efficient Cathode Catalyst

“…Li–O 2 batteries with superhigh theoretical energy density are considered as one of the most attractive energy storage systems and expected to meet bright prospective of high energy storage with long life. , However, they are still suffering from high overpotential, low round-trip efficiency, poor rate capability, and short lifespan, which hamper their practical applications at the commercial level. − One of the major reasons could be attributed to the sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) on the cathode during battery operation. , A highly efficient bifunctional catalyst toward the ORR as well as the OER can significantly enhance the comprehensive performance of the Li–O 2 battery by reducing the voltage polarization and promoting the kinetics. − Therefore, it is currently the need to find a high-efficiency ORR/OER bifunctional catalyst for development and large-scale applications of Li–O 2 batteries.…”

Virtual Special Issue of Research Highlights on Sustainable Energy and Clean Fuels at State Key Laboratory of Materials-Oriented Chemical Engineering (SKL-MCE), China

“…The zinc−air battery with an optimized Pt−Fe intermetallic electrocatalyst shows a higher maximum power density, a better specific capacity, and a longer discharge time than those of the Pt/C catalyst. Cao et al 18 report the synthesis of Co and N co-doped carbon material from zeolitic imidazolate framework 8 (ZIF-8) for a lithium−oxygen battery via a two-step route, in which Co is atomically dispersed into the ZIF-8-derived N-doped carbon matrix. This Co−N-doped carbon improves the work function of the carbon material, effectively reduces overpotential of both the oxygen reduction reaction (ORR) and oxygen evolution reaction, and thus improves the performance of the lithium−oxygen battery.…”

“…The zinc–air battery with an optimized Pt–Fe intermetallic electrocatalyst shows a higher maximum power density, a better specific capacity, and a longer discharge time than those of the Pt/C catalyst. Cao et al . report the synthesis of Co and N co-doped carbon material from zeolitic imidazolate framework 8 (ZIF-8) for a lithium–oxygen battery via a two-step route, in which Co is atomically dispersed into the ZIF-8-derived N-doped carbon matrix.…”