Related Experiment Video
Updated: Aug 6, 2026
Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
Published on: June 21, 2017
Polymer electrolyte-modified semi-solid iron anodes for efficient hydrogen evolution reaction suppression and highly
Yilin Hu1, Wenbin Yan1, Yahao Li1,2
1Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University Yichang 443002 Hubei China liyahao@ctgu.edu.cn xlyang@ctgu.edu.cn.
Abstract:
In aqueous iron-ion batteries, the reversible plating and stripping of iron anodes are hindered by the hydrogen evolution reaction (HER), which is thermodynamically favored over Fe2+ electroplating in acidic electrolytes. This limitation results in low coulombic efficiency and short cycle life. In this study, we present a novel semi-solid iron anode (SSIA) consisting of Fe powder and Super P encapsulated in polyethylene glycol (PEG) containing Fe(CF3SO3)2. This design isolates the iron anode from the aqueous electrolyte, effectively mitigating the HER, while the high specific surface area of the iron powder enhances reaction kinetics. The SSIA achieved a high coulombic efficiency of 97% in 1 M Fe(CF3SO3)2 electrolyte and maintained stable cycling of symmetric cells for over 1400 h at 0.1 mA cm-2 (0.1 mA h cm-2). This work proposes an innovative strategy to improve anode reversibility and cycling stability, providing valuable insights for designing advanced anode materials for grid-scale energy storage systems.
