为提高铁铁基普鲁士蓝(NaFeHCF)电极材料中电荷迁移速率以及离子扩散速率,采用水热合成法在碳布(CC)表面原位生长NaFeHCF晶体,制备了无粘结剂的NaFeHCF@CC电极材料,采用扫描电子显微镜和粉末X射线衍射仪对晶体结构和形貌进行表征,探究了碳布的活化处理和不同水热反应时间对NaFeHCF晶粒结构及电化学性能的影响。结果表明,碳布活化处理后,碳纤维表面有较多的生长位点,提高了碳布对NaFeHCF晶体的负载量;在活化处理的碳布基底上水热反应12h生长的NaFeHCF晶体结构较为完整,结晶度高,制备的电极材料循环300圈后面容量达0.10mAh/cm2,容量保持率达到74.5%。
In order to improve the charge migration rate and ion diffusion rate of FeFe-based Prussian blue (NaFeHCF) electrode material,a binder-free NaFeHCF@CC electrode material was prepared by in-situ growth of NaFeHCF crystals on the surface of carbon cloth (CC) using hydrothermal synthesis method.The crystal structure and morphology were characterized using canning electron microscope and powder X-ray diffractometer.The effects of CC activation treatment and hydrothermal reaction times on grain structure and electrochemical features of NaFeHCF were investigated.The findings indicated that,following CC activation,the surface of carbon fibre had more growth sites,thus enhancing the loading of CC for NaFeHCF crystals.The NaFeHCF crystals grown on an activated carbon cloth substrate using hydrothermal reaction for 12 hours exhibited a complete crystal structure and high crystallinity.The capacity of the prepared electrode material reached 0.10mAh/cm2 after 300 cycles,with a capacity retention rate of 74.5%.
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基金资助
杰出青年科技人才培养项目(2020Q003);新疆特种纺织材料的开发与应用研究天山创新团队(2017D14002);新疆维吾尔自治区研究生教育教学改革项目(XJ2022GY07)
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