Hydrogen‐Free and Dendrite‐Free All‐Solid‐State Zn‐Ion Batteries
City University of Hong Kong · Institute of Process Engineering · +1 more institution
Abstract
Abstract An ionic‐liquid‐based Zn salt electrolyte is demonstrated to be an effective route to solve both the side‐reaction of the hydrogen evolution reaction (HER) and Zn‐dendrite growth in Zn‐ion batteries. The developed electrolyte enables hydrogen‐free, dendrite‐free Zn plating/stripping over 1500 h cycle (3000 cycles) at 2 mA cm –2 with nearly 100% coulombic efficiency. Meanwhile, the oxygen‐induced corrosion and passivation are also effectively suppressed. These features bring Zn‐ion batteries an unprecedented long lifespan over 40 000 cycles at 4 A g –1 and high voltage of 2.05 V with a cobalt hexacyanoferrate cathode. Furthermore, a 28.6 µm thick solid polymer electrolyte of a poly(vinylidene…
Citation impact
- FWCI
- 37.14
- Percentile
- 100%
- References
- 43
Authors
9Topics & keywords
- Materials science
- Electrolyte
- Faraday efficiency
- Battery (electricity)
- Chemical engineering
- Dendrite (mathematics)
- Passivation
- Anode