二维-三维杂化结构Ti_(3)C_(2)T_(x)/CF作为钒电池负极的性能研究  

Performance study of 2D-3D hybrid Ti_(3)C_(2)T_(x)/CF as negative electrode of vanadium battery

作　　者：秦野 王硕 韩松 刘畅 井明华 QIN Ye;WANG Shuo;HAN Song;LIU Chang;JING Minghua(College of Materials Science and Engineering,Shenyang University of Chemical Technology,Shenyang Liaoning 110142,China;College of Chemistry,Liaoning University,Shenyang Liaoning 110036,China)

机构地区：[1]沈阳化工大学材料科学与工程学院,辽宁沈阳110142 [2]辽宁大学化学院,辽宁沈阳110036

出　　处：《电源技术》2024年第11期2272-2279,共8页Chinese Journal of Power Sources

基　　金：辽宁省组织部(XLYC2007157);辽宁省教育厅(LJKMZ20220768)。

摘　　要：碳毡是目前应用最广泛的钒电池电极材料,但其应用于钒电池负极时表现出较差的电化学反应活性,严重制约了钒电池性能。针对该问题,采用湿法刻蚀制备了二维Ti_(3)C_(2)T_(x)材料,利用简单高效的物理浸渍工艺将其修饰在三维碳毡(CF)纤维表面,成功制备了高催化活性的二维-三维杂化Ti_(3)C_(2)T_(x)/CF负极材料。结果表明,负载了Ti_(3)C_(2)T_(x)的碳毡复合电极显示出更好的亲液性;比表面积达到7.8596 m^(2)/g,是空白碳毡的4.7倍;且表现出更优的电化学反应活性。以Ti_(3)C_(2)T_(x)/CF复合材料为负极的电池在200和300 mA/cm^(2)的电流密度下,相比以空白碳毡为负极的电池,其能量效率分别提升了5.8%和7.3%,具有更高的电池效率和倍率性能。Carbon felt(CF)is the most widely used electrode material for vanadiumredox flow batteries(VRFBs).However,the poor electrochemical reactivity of CF served as the negative electrode in VRFBs seriously restricts the battery performance.To solve this problem,the 2D Ti_(3)C_(2)T_(x)is prepared by wet etching and modified on the CF surface by a simple and efficient physical impregnation technology,and the Ti_(3)C_(2)T_(x)/CF composite electrode with high catalytic activity is successfully manufactured.The results show that the Ti_(3)C_(2)T_(x)/CF composite electrode has better lyophilic properties and electrochemical reactivity towards the V3+/V2+redox couples.The specific surface area reaches 7.8596 m^(2)/g,which is 4.7 times that of the original CF.At the current density of 200 mA/cm^(2)and 300 mA/cm^(2),the energy efficiency of the VRFB using Ti_(3)C_(2)T_(x)/CF as the negative electrode is 5.8%and 7.3%higher than that of the blank CF,which exhibits higher battery efficiency and rate performance.

关 键 词：钒电池 负极 Ti_(3)C_(2)T_(x) 复合电极材料 二维材料 

分 类 号：TM912[电气工程—电力电子与电力传动]