电解质
过电位
电池(电)
电化学
水溶液
阴极
石墨
无机化学
电化学窗口
化学
储能
材料科学
电极
冶金
离子电导率
有机化学
功率(物理)
物理
物理化学
量子力学
作者
Zahid Ali Zafar,Ghulam Abbas,Abdul Wahab,Jiří Červenka
出处
期刊:Meeting abstracts
日期:2023-08-28
卷期号:MA2023-01 (5): 935-935
标识
DOI:10.1149/ma2023-015935mtgabs
摘要
Aqueous zinc-based batteries have the potential to be used for large-scale energy storage because they are inexpensive, safe, and environmentally friendly. However, their energy density is limited because they use low-voltage cathodes and electrolytes. Graphite could be a suitable cathode material for these batteries because it has a high redox potential. However, finding a stable aqueous electrolyte that can handle the high voltage is a major challenge. This study presents a low-cost aqueous zinc-graphite dual-ion battery that uses a Zn(ClO 4 ) 2 water-in-salt electrolyte with a wide electrochemical window of 2.80 V. This electrolyte, which contains strong chaotropic ClO 4 − anions, allows for the reversible plating and stripping of zinc ions with a low overpotential and a high upper cut-off potential. As a result, the battery is able to deliver a maximum discharge capacity of 45 mA h g −1 at a discharge rate of 100 mA g −1 with a mean discharge voltage of around 1.95 V vs Zn 2+ /Zn and can be used for over 500 cycles. References: A. Z. A. Zafar, et al, Journal of Materials Chemistry A, 10 (2022) 2064-2074. A. Zafar, M. Šilhavík, J. Červenka , Patent LU101731
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