基于二维VO_(x)纳米带超级电容器的印刷制备及性能研究  

Research on Printing Preparation and Performance of Two-Dimensional VO_(x)Nanobelt Supercapacitor

作　　者：唐文涛[1] 王婧璐 郑茵茵 林宝莹 涂倩 邓亚峰 郭婷[1] 陈良哲 TANG Wen-tao;WANG Jing-lu;ZHENG Yin-yin;LIN Bao-ying;TU Qian;DENG Ya-feng;GUO Ting;CHEN Liang-zhe(Electronic Information Engineering College,Jingchu University of Technology,Jingmen 448000,China)

机构地区：[1]荆楚理工学院电子信息工程学院,荆门448000

出　　处：《印刷与数字媒体技术研究》2023年第5期100-114,共15页Printing and Digital Media Technology Study

基　　金：湖北省高等学校优秀中青年科技创新团队(No.T2022038,No.T2021028);荆门市重点科技计划项目(No.2022ZDYF017,No.2021YFZD045,No.2020YFZD007);大学生创新创业训练计划项目(No.S202311336001);荆楚理工学院校级科研项目(No.YY202204,No.ZD202312)。

摘　　要：钒氧化物具有较高的理论比电容,是一种理想的电极材料,结合丝网印刷工艺制备电极,具有广阔的应用前景。鉴于此,本研究采用简易的溶剂热法一步获得具有混合价态的二维氧化钒(VO_(x))纳米带,探究制备工艺对电极性能的影响,组装纽扣超级电容器。测试分析结果表明,制得的VO_(x)具有典型的纳米带结构,长宽比约为5.5,存在V^(4+)和V^(5+)混合价态,有VO_(2)和V_(3)O_(7)·H_(2)O两种晶型,具有丰富的介孔结构,比表面积高达85.18m^(2)/g。在电化学性能测试中,得益于VO_(x)的带状结构和油墨通过丝网印刷后的规则性排列,当电流密度为0.5A/g时,经100目网版印刷的VO_(x)电极比电容可达213.1F/g,且历经5000次循环后比电容保持率仍有90.1%,远优于涂抹电极。此外,当电解液浓度为1.5mol/L,封装压力为1.25T时,VO_(x)对称型纽扣超级电容器表现出最佳的电化学性能,比电容和电容保持率分别为238.2F/g(0.5A/g电流密度)和88.9%(5000次充放电循环),当功率密度为412.5kW/kg时,最高能量密度可达90.1Wh/kg,优于部分文献报道的钒氧化物超级电容器。本研究以VO_(x)纳米带为电极材料,结合丝网印刷并组装后获得性能优异的超级电容器,可为印刷储能器件提供可供借鉴的思路。Vanadium oxide has a high theoretical specific capacitance which is a kind of ideal electrode material.It can prepare electrodes combined with screen printing technology and has broad application prospects.Given this,a simple solvent method was used to obtain two-dimensional vanadium oxide(VO_(x))nanobelts with mixed valence states in one step,the effect of preparation technology for electrode properties was investigated,andcoin supercapacitors were assembled.The results showed that the prepared VO_(x)has a typical nanobelt structure,with a length-width ratio of about 5.5,a mixed valence state of V^(4+)and V^(5+),two crystal forms of VO_(2)and V_(3)O7·H_(2)O,showing a mesoporous morphology and a specific surface area of 85.18m_(2)/g.In electrochemical performance testing,benefit to the ribbon structure of VO_(x)and the regular arrangement of ink after screen printing,the specific capacitance of screen-printed VO_(x)electrodes by 100 mesh screen can reach 213.1F/g when the current density was 0.5A/g.After 5000 cycles,the specific capacitance retention rate was still 90.1%,better than the performance of the smeared electrode.In addition,when the electrolyte concentration was 1.5mol/L and the packaging pressure was 1.25T,the VO_(x)symmetric coin supercapacitor exhibited the best electrochemical performance,with a specific capacity and capacitance retention rate of 238.2F/g(0.5A/g current density)and 88.9%(5000 charge and discharge cycles),respectively.When the power density was 412.5kW/kg,the maximum energy density can reach 90.1W/kg,which was better than some literature reports of vanadium oxide supercapacitors.In this study,VO_(x)nanobelts were used as electrode materials,combined with screen printing and assembly to obtain high-performance supercapacitors,which can provide a reference for printing energy storage devices.

关 键 词：VO_(x) 纳米带 丝网印刷 纽扣超级电容器 

分 类 号：TQ135.11[化学工程—无机化工] TS871.1[轻工技术与工程]