Long-range interconnected nanoporous Co/Ni/C composites as bifunctional electrocatalysts for long-life rechargeable zinc-air batteries

Engineering Molecular Heterostructured Catalyst for Oxygen Reduction Reaction

“…As shown in Figure b, the FeCo-MHs cathode gives a maximum power density as high as 319.7 mW cm –2 , which is far higher than that for Fe-CNTs (240.6 mW cm –2 ) and Co-CNTs (172.3 mW cm –2 ). Notably, ZAB with FeCo-MHs as cathode catalyst displayed an exceptional lifetime for charge/discharge cycles; under 10 mA cm –2 , the resulting ZAB could run for 2000 h (12 000 cycles) without noticeable voltage fading (Figure c), showcasing the advantageous long-term stability over other reported electrocatalysts (Figure d). ,,,,− Specifically, the FeCo-MHs cathode displayed an initial charge/discharge voltage gap as narrow as ∼0.87 V, and the voltage gap after long-term cycling could still be retained at ∼0.95 V; in addition, under a large current density of 20 mA cm –2 , the ZAB could run for 500 h (3300 cycles) (Figure S31). As a proof-of-concept illustration, we assembled a circuit comprising two FeCo-MHs-based ZABs in series, powering four red-light-emitting diodes in parallel (Figure S32).…”

A supramolecular strategy to precisely fabricate binary-doped metal-free graphdiyne for high-performance zinc–air batteries

“…Recently, binary or multiheteroatom-doped carbon materials have attracted tremendous attention since they often demonstrate superior performance to single atom doping attributable to the synergetic effect. [30][31][32][33][34][35][36][37][38][39] As of now, many non-metal atoms have been successfully co-doped into carbon materials, including the widely-reported nitrogen (N), boron (B), fluorine (F), phosphorous (P), and sulfur (S). Many methods have been devoted to performing co-doping on carbon.…”

Preparation and bifunctional properties of the A-site-deficient SrTi0.3Fe0.6Ni0.1O3−δ perovskite

“…Therefore, the development of non-noble, metal-effective bifunctional oxygen electrocatalysts is crucial for improving the performance of Zn–air batteries. 9 To date, some bifunctional oxygen electrocatalytic materials have been studied, including carbon-based materials and nonnoble metal oxides. However, owing to the poor stability of carbon-based materials in an oxidative environment compared to that of metal oxides, the latter are favored by researchers.…”