首页|棒状V3O7·H2O电极材料的制备及印刷超级电容器

棒状V3O7·H2O电极材料的制备及印刷超级电容器

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以V2O5为原料,利用溶剂热法一步制备了 V3O7·H2O纳米棒,采用SEM、XRD、EDS、XPS和FTIR对样品进行了测试.以V3O7·H2O纳米棒为电极材料,探究了丝网印刷工艺对电极电化学性能的影响,将此电极组装超级电容器并评价了其电化学性能.结果表明,丝网印刷电极比电容可达268.0 F/g(电流密度为0.3 A/g),经过5000次循环后电容保持率为85.9%,优于涂抹电极的比电容(246.0 F/g)和电容保持率(68.0%),这得益于丝网印刷的油墨规则排列的结构.组装的纽扣超级电容器也表现出优异的电化学性能,比电容和电容保持率为134.2 F/g(0.5 A/g电流密度)和91.2%(5000次充放电循环),且当能量密度为22.0 W·h/kg时,功率密度最高可达 4125.0 W/kg.
Fabrication of rod-like V3O7·H2O electrode material and printed supercapacitor
V3O7·H2O nanorods were prepared via one-step solvothermal method using V2O5 as raw materials and characterized by SEM,XRD,EDS,XPS and FTIR.The influence of screen-printing technology on the electrochemical performance of electrode was investigated using V3O7·H2O nanorods as electrode material,and the electrode was further assembled into a supercapacitor and its electrochemical performance was evaluated.The results showed that the specific capacitance of the screen-printed electrode reached 268.0 F/g at a current density of 0.3 A/g,with a capacitance retention maintained at 85.9%after 5000 charge/discharge cycles,significantly improved compared with those of smeared electrode with 246.0 F/g and 68.0%,respectively.This performance improvement was attributed to the regular ink structure arrangement of screen printing.Moreover,the assembled coin supercapacitor exhibited excellent electrochemical performance with a specific capacitance of 134.2 F/g at 0.5 A/g and capacitance retention of 91.2%after 5000 charge/discharge cycles.And the power density reached as high as 4125.0 W/kg when the energy density was 22.0 W·h/kg.

V3O7·H2Onanorodsscreen-printingcoin supercapacitorelectro-organic chemistry

涂倩、王婧璐、郑茵茵、林宝莹、张强、刘善培、陈良哲

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荆楚理工学院电子信息工程学院,湖北荆门 448000

七氧化三钒 纳米棒 丝网印刷 纽扣超级电容器 有机电化学

湖北省高等学校优秀中青年科技创新团队项目荆门市重点科技计划荆门市重点科技计划大学生创新创业训练计划

T20220382022YFZD0452020YFZD007S202311336001

2024

精细化工
大连化工研究院设计院 中国化工学会精细化工专业委员会 辽宁省化工研究院

精细化工

CSTPCD北大核心
影响因子:0.557
ISSN:1003-5214
年,卷(期):2024.41(5)
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