Sambhaji S. Shinde, Jin Young Jung, Nayantara K. Wagh, Chi Ho Lee, Dong-Hyung Kim, Sung-Hae Kim, Sang Uck Lee & Jung-Ho Lee
Abstract
All-solid-state zinc–air pouch cells promise high energy-to-cost ratios with inherent safety; however, finding earth-abundant high power/energy cathodes and super-ionic electrolytes remains a fundamental challenge. Here we present realistic zinc–air pouch cells designed by the (101)-facet copper phosphosulfide [CPS(101)] as a cathode as well as anti-freezing chitosan-biocellulosics as super-ionic conductor electrolytes. The proposed CPS(101) exhibits trifunctional activity and stability (>30,000 cycles) towards reversible oxygen reactions and hydrogen evolution reactions, outperforming commercial Pt/C and RuO2. Furthermore, hydroxide super-ion conductors utilizing polymerized chitosan-biocellulosics reveal exceptional conductivity (86.7 mS cm−1 at 25 °C) with high mechanical/chemical robustness. High cell-level energy densities of 460 Wh kgcell–1/1,389 Wh l−1 are normally measured in pouch cells (1 Ah) with a cycle lifespan of 6,000/1,100 cycles at 25 mA cm−2 for 20/70% depths of discharge, and the highest densities we could achieve were 523 Wh kgcell–1/1,609 Wh l−1. Flexible pouch cells operate well at rates of 5–200 mA cm−2 over a broad temperature range of −20 to 80 °C.
The advancements in all-solid-state zinc–air pouch cells are truly impressive, especially with the use of CPS(101) cathodes and chitosan-biocellulosic electrolytes. Achieving such high energy densities, cycle lifespans, and broad temperature operability highlights the potential of these materials for next-generation energy storage. The exceptional super-ionic conductivity and mechanical stability of the electrolyte further emphasize the innovation in this research.
For students exploring advanced energy storage systems, breakthroughs like this offer valuable insights into electrochemistry, materials science, and sustainability. If you're working on similar topics or need chemistry coursework help understanding these real-world applications can deepen your grasp of the subject while connecting theory to cutting-edge research.
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