塔菲尔方程
过电位
析氧
材料科学
化学工程
氢氧化物
催化作用
电池(电)
阴极
聚丙烯腈
纳米技术
电极
化学
复合材料
电化学
聚合物
有机化学
物理化学
功率(物理)
工程类
物理
量子力学
作者
Jiajia Li,Yunong Qin,Zikui Bai,Shifeng Li,Ling Li,Bo Ouyang,Erjun Kan,Wenming Zhang
标识
DOI:10.1016/j.apsusc.2023.159080
摘要
NiFe layered double hydroxide (NiFe-LDH) is an efficient and widely available catalyst for the oxygen evolution reaction (OER), but further improvement of its OER property remains a challenge. Therefore, a conductive Ni-organic framework is triumphantly synthesized in-situ on NiFe-LDH/carbon nanofibers (Ni-CAT/NiFe-LDH/CNFs) through a hydrothermal treatment. This configuration utilizes the exposed surface area and the electron transfer pathways of Ni-CAT and CNFs, resulting in exceptional OER kinetics in alkaline conditions. A low overpotential of 370 mV at 10 mA cm−2 and a small Tafel slope of 79 mV dec−1 are achieved. The liquid-state Zn-air batteries, featuring Ni-CAT/NiFe-LDH/CNFs catalyst as an air cathode, indicate a significant peak power density of 292.1 mW cm−2 and an extended cycle durability of over 66 h. Solid-state Zn-air batteries demonstrate stable cycling at various flat/bent/flat states, showing great potential for flexible electronic device applications. According to experimental measurements and computational analysis, the in-situ growth of Ni-CAT on the NiFe-LDH matrix can optimize intermediate adsorption and alter hydrophilicity, resulting in improved performance of Zn-air batteries.
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