Hierarchical bifunctional catalysts with tailored catalytic activity for high-energy rechargeable Zn-air batteries

Zinc–Air Batteries with an Efficient and Stable MnCo2O4/Carbon Fiber Bifunctional Electrocatalyst and a Poly(acrylic Acid)-Based Gel Electrolyte

“…5 This necessitates the use of electrocatalysts for the air electrode reactions. 6,7 The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) take place at the air electrode during the discharge and charge of a ZAB, respectively. 8,9 Traditionally, precious metal-based electrocatalysts like Pt and Ru have been used to improve the performance of ZABs; however, their high cost, scarcity, and cycling instability make their use for large-scale applications impractical.…”

“…Development of rechargeable ZABs is constrained by the sluggish kinetics of the reactions that take place at the air electrode, which limit the roundtrip efficiency of the device . This necessitates the use of electrocatalysts for the air electrode reactions. , The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) take place at the air electrode during the discharge and charge of a ZAB, respectively. , Traditionally, precious metal-based electrocatalysts like Pt and Ru have been used to improve the performance of ZABs; however, their high cost, scarcity, and cycling instability make their use for large-scale applications impractical . Transition metal oxides have been investigated as effective electrocatalysts for ZABs; e.g., Mn and Co oxides show promising catalytic activity toward the ORR and OER, respectively.…”

The in situ construction of oxygen-vacancy-rich NiCo2S4@NiMoO4/Ni2P multilevel nanoarrays for high-performance aqueous Zn-ion batteries

“…4,5 In this context, aqueous Zn-ion batteries as a sustainable and promising alternative to lithiumion batteries have attracted most scientific interest owing to their intrinsic safety, the extensive global stockpile of Zn, and larger output voltage (B1.8 V). [6][7][8][9] However, regarding Zn anodes, the actual capacity achieved via experimental research is far away from the brilliant theoretical capacity (820 mA h g À1 ); therefore improving the rate capability and specific capacity of the cathode is still the current key challenge for zinc-ion batteries. [10][11][12][13] Recently, the practical design of composite materials via the construction of multilevel structures and heterojunctions is an available method for increasing the sites of active centers, improving the conductivity, and accelerating electron transfer.…”

“…4,5 In this context, aqueous Zn-ion batteries as a sustainable and promising alternative to lithium-ion batteries have attracted most scientific interest owing to their intrinsic safety, the extensive global stockpile of Zn, and larger output voltage (∼1.8 V). 6–9 However, regarding Zn anodes, the actual capacity achieved via experimental research is far away from the brilliant theoretical capacity (820 mA h g −1 ); therefore improving the rate capability and specific capacity of the cathode is still the current key challenge for zinc-ion batteries. 10–13…”

Research on the influence of electrolytes on the low‐temperature start‐up performance of zinc‐air battery for forklifts

“…In use, it takes a lot of energy to gradually restore the battery to room temperature. Manganese dioxide has shown good cycle stability and excellent anti‐polarization ability under high‐current density in the test of zinc‐air battery, so it is widely used as a catalyst 19 . Xu et al 20 found that CoMnO 2 /CNTs‐based zinc‐air batteries exhibit high power density, and proved that they have great potential in the fields of electric vehicles and portable electronic devices.…”