电解质
阴极
储能
化学工程
小袋
材料科学
化学
电极
物理
工程类
热力学
医学
解剖
物理化学
功率(物理)
作者
S.S. Shinde,Jin Young Jeong,Nayantara K. Wagh,Chi H. Lee,Dong‐Hyung Kim,Sung‐Hae Kim,Sang Uck Lee,Jung‐Ho Lee
出处
期刊:Nature Energy
[Springer Nature]
日期:2021-04-12
卷期号:6 (6): 592-604
被引量:191
标识
DOI:10.1038/s41560-021-00807-8
摘要
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. Zinc–air batteries are viewed as a sustainable storage technology, but their commercialization requires a genuine performance leap forwards from the laboratory scale. Here the authors report a cell-level design and demonstrate an ampere-hour pouch cell with exceptionally high energy density and cycle lifespan.
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