超级电容器
材料科学
电极
电容
氢氧化物
化学工程
氧气
复合材料
纳米技术
化学
有机化学
物理化学
工程类
作者
Dong Shi,Yajun Ji,Faxue Lu,Junnan Yao
标识
DOI:10.1016/j.matlet.2023.134884
摘要
Herein, a high-performance supercapacitor negative electrode was constructed by soaking the NiFe foam in H2SO4 just for 5 min. Benefiting from the in-situ route, hierarchical porous structure and abundant oxygen vacancies, the obtained NiFe layered double hydroxide foam presented excellent capacitive performance (1.54F cm−2 at 5 mA cm−2). Furthermore, the assembled hybrid supercapacitor yielded a high energy density of 0.15 mWh cm−2 and an excellent cycle life with 86.7% capacitance retention even after 7000 cycles, which outperformed the previously reported asymmetric supercapacitors. This work definitely shed light on the possible industrialization of the negative electrode material
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