Preparation and Property Comparison of Ti2CTx byMolten Salt Method and Liquid Phase Method
-
摘要: 采用熔盐法（NaF+KF）和液相法（HCl+NaF）刻蚀Ti2AlC制备得到Ti2CTx，对比研究了2种方法下刻蚀产物的物相组成、微观形貌、表面官能团及电化学性能。结果表明：液相法所得Ti2CTx纯度较高，表面有4种官能团（C-O、C=O、C-F和O-H），杂质主要为TiC；熔盐法所得Ti2CTx片层间距较小，表面有2种官能团（C=O和O-H），杂质主要为K2NaAlF6；熔盐法及液相法制得的Ti2CTx均表现出良好的倍率性能及电化学可逆性，后者电容性能更佳。Abstract: Ti2CTx was prepared through etching Ti2AlC by molten salt method (NaF+KF) and liquid phase method (HCl+NaF). The phase composition, microscopic morphology, surface functional groups and electrochemical properties of etched products by the two methods were compared and studied. The results show that the Ti2CTx obtained by liquid phase method had higher purity with four functional groups (C-O, C=O, C-F and O-H) on the surface, and the main impurity was TiC. The Ti2CTx obtained by molten salt method had small interlayer spacing with two functional groups (C=O and O-H) on the surface, and the main impurity was K2NaAlF6. Ti2CTx prepared by molten salt method and liquid phase method both showed good rate performance and electrochemical reversibility, and the latter had better capacitance performance.
-
Keywords:
- MXene /
- Ti2CTx /
- molten salt method /
- liquid phase method
-
-
[1] NAGUIB M,MASHTALIR O,CARLE J,et al. Two-dimensional transition metal carbides[J].ACS Nano, 2012,6(2):1322-1331.
[2] BARSOUM M W.The MN+1AXN phases:A new class of solids[J].Progress in Solid State Chemistry, 2000,28(1/2/3/4):201-281.
[3] SUN Z M.Progress in research and development on MAX phases:A family of layered ternary compounds[J].International Materials Reviews, 2011,56(3):143-166.
[4] SHEIN I R,IVANOVSKⅡ A L.Graphene-like titanium carbides and nitrides Tin+1Cn,Tin+1Nn (n=1,2 and 3) from de-intercalated MAX phases:First-principles probing of their structural,electronic properties and relative stability[J].Computational Materials Science,2012,65:104-114.
[5] LI X Q,WANG C Y,CAO Y,et al.Functional MXene materials:Progress of their applications[J].Chemistry-an Asian Journal, 2018,13(19):2742-2757.
[6] JIANG Y,XIE X,CHEN Y,et al.Hierarchically structured cellulose aerogels with interconnected MXene networks and their enhanced microwave absorption properties[J].Journal of Materials Chemistry C, 2018,6(32):8679-8687.
[7] NAGUIB M,MOCHALIN V N,BARSOUM M W,et al.25th anniversary article:MXenes:A new family of two-dimensional materials[J].Advanced Materials, 2014,26(7):992-1005.
[8] TANG Q,ZHOU Z,SHEN P W.Are MXenes promising anode materials for Li ion batteries? Computational studies on electronic properties and Li storage capability of Ti3C2 and Ti3C2X2 (X=F,OH) monolayer[J].Journal of the American Chemical Society, 2012,134(40):16909-16916.
[9] HU T,WANG J M,ZHANG H,et al.Vibrational properties of Ti3C2 and Ti3C2T2 (T=O,F,OH) monosheets by first-principles calculations:A comparative study[J].Physical Chemistry Chemical Physics, 2015,17(15):9997-10003.
[10] AHMED B,ANJUM D H,HEDHILI M N,et al.H2O2 assisted room temperature oxidation of Ti2C MXene for Li-ion battery anodes[J].Nanoscale, 2016,8(14):7580-7587.
[11] ZHANG C J,ANASORI B,SERAL-ASCASO A,et al.Transparent,flexible,and conductive 2D titanium carbide (MXene) films with high volumetric capacitance[J].Advanced Materials, 2017,29(36):1702678.
[12] ZHAO S,ZHANG H B,LUO J Q,et al.Highly electrically conductive three-dimensional Ti3C2Tx MXene/reduced graphene oxide hybrid aerogels with excellent electromagnetic interference shielding performances[J].ACS Nano,2018,12(11):11193-11202.
[13] ZHI W Q,XIANG S L,BIAN R J,et al.Study of MXene-filled polyurethane nanocomposites prepared via an emulsion method[J].Composites Science and Technology, 2018,168:404-411.
[14] GHIDIU M,LUKATSKAYA M R,ZHAO M Q,et al.Conductive two-dimensional titanium carbide ‘clay’ with high volumetric capacitance[J].Nature, 2014,516(7529):78-81.
[15] URBANKOWSKI P,ANASORI B,MAKARYAN T,et al.Synthesis of two-dimensional titanium nitride Ti4N3(MXene)[J].Nanoscale, 2016,8(22):11385-11391.
计量
- 文章访问数: 1
- HTML全文浏览量: 0
- PDF下载量: 1
下载:
