电解质
锌
电池(电)
石墨
水解
材料科学
无机化学
氯化物
化学工程
化学
冶金
电极
有机化学
功率(物理)
物理
物理化学
量子力学
工程类
作者
Yifan Deng,Jie Wu,Minggang Zhang,Hui Mei,Chao Chen,Laifei Cheng,Litong Zhang
标识
DOI:10.1002/admt.202401042
摘要
Abstract Ag–Zn batteries have the advantages of being a high‐safety and stable discharge platform but still face challenges such as high cost, electrolyte hydrolysis, and zinc dendrites. In this study, a low‐cost roughness graphite paper (GP) enables more uniform loaded Ag particles to construct Ag/rough graphite paper (Ag/RGP) cathode with high wettability of low‐concentration ZnCl 2 electrolyte, achieving both capacity and reversibility enhancement. Both a few additions of citric acid (CA) to the low‐concentration ZnCl 2 electrolyte can also inhibit the hydrolysis of Zn 2+ and increase the nucleation overpotential due to suitable acidity and complexation ability, resulting in more even Zn deposited behavior on low‐cost Zn foil anode. Meanwhile, the ZnCl 2 ‐CA electrolyte can also promote redox reaction and thus improve the capacity of the Ag/RGP cathode. As a result, the assembled large‐size Ag–Zn battery (50 cm 2 ) with low‐cost Ag/RGP and low‐concentration ZnCl 2 ‐CA obtains a capacity of 0.76 mAh cm −2 at a current density of 0.4 mA cm −2 , with a cycle life of ≈100% capacity retention over 50 cycles, also easily powering a LED array and displaying high practicability. This work provides a feasible and practical route to fabricate large‐size and low‐cost Ag–Zn batteries.
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