材料科学与工程学报2024，Vol.42Issue(4)：553-561,9.DOI:10.14136/j.cnki.issn1673-2812.2024.04.003
磷掺杂钴酸铁电极材料用于非对称超级电容器
Phospho-doped FeCo2O4 Electrode Material for Asymmetric Supercapacitors
摘要
Abstract
Phosphorus-doped FeCo2O4 nanowire (P-FeCo2O4-x) electrode materials were grown in situ on flexible carbon cloth using simple hydrothermal and low-temperature phosphorylation methods,and the effects of various phosphorus source additions on the morphology and properties of P-FeCo2O4-x were investigated.The results showed that the prepared P-FeCo2O4-x-2 electrode materials had uniform and rough morphology and excellent electrochemical properties at a current density of 5 mA/cm2 with a specific capacitance of 3643 mF/cm2 and a capacity retention rate of 85.9％ after 5000 charge/discharge cycles at current of 20 mA/cm2.The performance enhancement is mainly attributed to the doping of phosphorus into the spinel structure,which replaces some of the oxygen atoms and forms oxygen vacancies,increasing the degree of defects,while improving the electronic structure and increasing the conductivity.Being assembled into a flexible asymmetric supercapacitor,the positive pole is P-FeCo2O4-x-2 material,and the negative pole is activated carbon (AC).The capacitor exhibits an excellent energy density of 40.9 Wh/kg at a power density of 747.4 W/kg.In addition,after 2000 charge-discharge cycles,the capacity retention rate remains stable at 82.1％,even at a current density of 5 A/g.关键词
超级电容器/磷掺杂/钴酸铁/纳米线/高能量密度Key words
Supercapacitor/Phosphorus-doped/Cobalt acid iron/Nanowires/High energy density分类
化学工程引用本文复制引用
姚远,吴凤楠,徐子明,刘冬澳,罗意,杨俊和,薛裕华,李生娟..磷掺杂钴酸铁电极材料用于非对称超级电容器[J].材料科学与工程学报,2024,42(4):553-561,9.基金项目
上海市科学技术委员会地方高校能力建设项目(20060502200) （20060502200）
上海市"中央引导地方科技发展基金"项目(YDZX20223100003005) （YDZX20223100003005）
