材料科学
氢氧化物
电池(电)
阴极
化学工程
兴奋剂
镍
碱性电池
储能
无机化学
光电子学
冶金
化学
功率(物理)
物理化学
工程类
物理
量子力学
作者
Sadegh Askari,Davide Mariotti,Paul Brunet,Alexander Vahl,Jan Benedikt
标识
DOI:10.1016/j.mtener.2021.100879
摘要
Hybrid Zn–air and Zn–M (M represents transition metal oxide/hydroxide) batteries combined at the cell level take the advantages of Zn–air high-capacity and Zn–M high cell voltage. However, the performance of a Zn–air/M battery relies on finding a dual-functional cathode material, which can effectively serve both battery's chemistries. Here, we demonstrate the superior performance of a hybrid battery cathode based on Fe-doped Ni double hydroxide nanoflakes and activated carbon material. Fe doping transforms the disordered crystal structure of Ni hydroxide to a stable hydrotalcite-type structure with significantly enhanced redox conversion capacity, improved electric conductivity, and superior oxygen evolution reaction activity. Therefore, the hybrid battery exhibits a high total energy density, unprecedented energy conversion efficiency (87% at 4 mA/cm2), and superior power density (100 mW/cm2 at 60 mA/cm2) that outperform reported hybrid batteries of other cathode materials. Moreover, the hybrid Zn–air/Ni1−xFex–layered double hydroxide battery is featured with the capability of high-rate charging owing to the rapid kinetics of the redox reactions and the excellent catalytic activity of the cathode materials.
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