Publications by authors named "Hangning Liu"

Article Synopsis
  • Rechargeable aqueous zinc-sulfur batteries (AZSBs) are praised for their high energy density and safety but face challenges like poor reaction kinetics and polysulfide dissolution.
  • This research introduces an organic-inorganic hybrid electrolyte and a novel sulfur cathode design to improve AZSB performance by optimizing both components.
  • The resulting AZSB with the new design shows significant enhancements in discharge capacity, efficiency, and cycling stability, attributed to improved reaction kinetics and reduced polysulfide issues.
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Electrochemical water splitting holds promise for sustainable hydrogen production but restricted by the sluggish reaction kinetics at the anodic oxygen evolution. Herein, we present a room-temperature spontaneous corrosion strategy to convert inexpensive iron (Fe) on iron foam substrates into highly active and stable self-supporting nickel iron layered hydroxide (NiFe LDH) catalysts. The corrosion evolution mechanisms are elucidated combining ex-situ scanning electron microscopy (SEM) and X-ray photo electron spectroscopy (XPS) techniques, demonstrating precise control over the concentration of Ni2+ and reaction time to achieve controllable micro-structures of NiFe LDH.

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Electrochemical water-splitting to produce hydrogen is potential to substitute the traditional industrial coal gasification, but the oxygen evolution kinetics at the anode remains sluggish. In this paper, sea urchin-like Fe doped NiS catalyst growing on nickel foam (NF) substrate is constructed via a simple two-step strategy, including surface iron activation and post sulfuration process. The NF-Fe-NiS obtains at temperature of 130 °C (NF-Fe-NiS-130) features nanoneedle-like arrays which are vertically grown on the particles to form sea urchin-like morphology, features high electrochemical surface area.

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The development of lithium-ion batteries with simplified assembling steps and fast charge capability is crucial for current battery applications. In this study, we propose a simple in-situ strategy for the construction of high-dispersive cobalt oxide (CoO) nanoneedle arrays, which grow vertically on a copper foam substrate. It is demonstrated that this nanoneedle CoO electrodes provide abundant electrochemical surface area.

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