Ti<sub>3</sub>C<sub>2</sub> MXenes with Modified Surface for High-Performance Electromagnetic Absorption and Shielding in the X-Band

Han, Meikang; Yin, Xiaowei; Wu, Heng; Hou, Zexin; Chen, Song; Li, Xinliang; Zhang, Litong; Cheng, Laifei

doi:10.1021/acsami.6b06455

Cited by 800 publications

(486 citation statements)

References 61 publications

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“…15,41 Compared with Ti 3 C 2 MXene, spectra of the Ti 3 C 2 /TiO 2 -np (II) and Ti 3 C 2 /TiO 2 -nw (II) show four new peaks at 144, 403, 513, and 628 cm −1 separately, which are assigned to the anatase vibrational modes. 8,31,42 These results further demonstrate the formation of anatase TiO 2 after the oxidization treatment of Ti 3 C 2 MXene under different experimental conditions. The two broad peaks between 1350 and 1580 cm −1 belong to the D-and G-modes of graphitic carbon.…”

Section: Resultssupporting

confidence: 58%

Room Temperature Oxidation of Ti₃C₂MXene for Supercapacitor Electrodes

Cao

Wang

et al. 2017

J. Electrochem. Soc.

156

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Two kinds of Ti 3 C 2 /TiO 2 hybrids were synthesized by room temperature oxidation methods, named as Ti 3 C 2 /TiO 2 -nanoparticles and Ti 3 C 2 /TiO 2 -nanowires, respectively. Effects of reaction time and concentration of NaOH solution on the microstructures and electrochemical performances of Ti 3 C 2 /TiO 2 composites were studied in details. When used as electrodes for supercapacitors, both Ti 3 C 2 /TiO 2 -nanoparticles and Ti 3 C 2 /TiO 2 -nanowires exhibit enhanced supercapacitive performances. The electrochemical measurement results show that the specific capacitances of Ti 3 C 2 /TiO 2 -nanoparticles and Ti 3 C 2 /TiO 2 -nanowires electrodes are 128 and 143 F/g at 2 mV/s, respectively, which are larger than that of Ti 3 C 2 MXene (91 F/g). Furthermore, after 6000 charge-discharge cycles at 5 A/g, 88% and 80% of the initial capacitances are retained for Ti 3 C 2 /TiO 2 -nanoparticles and Ti 3 C 2 /TiO 2 -nanowires, respectively. Therefore, this work not only enhances the understanding of the surface states and morphology structures of Ti 3 C 2 MXene at different reaction condition in the aqueous solutions, but also provides simple and facile ways to fabricate photocatalysts, 5-8 lithium-ion batteries 9-11 and supercapacitors. 12-14MXenes are produced by selective etching of "A" layers from M n+1 AX n (n = 1, 2, 3) phase, where M belongs to an early transition metal, A represents a IIIA or IVA element, and X is C and/or N. [15][16][17] The structures of the etched resultants are similar to the exfoliated graphite.15 Typically, MXenes are terminated by -OH, -O and/or -F surface groups (denoted as T x ), and so their general formula is M n+1 X n T x , 15,17,18 such as Ti 3 C 2 T x and Ti 2 CT x . MXenes show significant potential in energy storages benefiting from their layered structure, hydrophilic surfaces, outstanding electrical conductivity and excellent chemical stability. 10,12,13,[17][18][19][20] MXene-derived nanoribbons, formed in simultaneous oxidation and alkalization processes, also show high-performances in sodium and potassium ion batteries. 21 In addition, the electrochemical properties of MXenes and MXenesbased materials have been extensively investigated in aqueous 13,22,23 and nonaqueous electrolytes. 24,25 Notably, MXenes have been demonstrated to exhibit large pseudocapacitance, which is caused by ion intercalation between their two-dimensional nanosheets. 26,27 In order to satisfy the increasing strict requirements of energy storage devices, MXenes are motivated to exploit much better electrochemical performances. Recent studies reported that introduction of transition metal oxides into MXenes is an efficient way to improve the electrochemical properties in supercapacitors 28-31 and lithium-ion batteries 32,33 . Among the transition metal oxides, titanium dioxide (TiO 2 ) is one of the most widely investigated electrode materials, owing to its low cost, abundant availability and convenient synthesis in nanoscale sizes. [34][35][36][37] Many studies have reported different preparation...

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Section: Resultssupporting

confidence: 58%

Room Temperature Oxidation of Ti₃C₂MXene for Supercapacitor Electrodes

Cao

Wang

et al. 2017

J. Electrochem. Soc.

156

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“…The PL intensity of MoS 2 can be greatly quenched at MoS 2 /graphene [32] and MoS 2 /Au [33] contact due to strong Auger recombination. The electric conductivity of Ti 3 C 2 T x is 4.2 × 10 −4 S/m [9], which is comparable to graphene. Similar to the PL quenching observed at graphene/TMD interface, the Auger recombination at WS 2 /Ti 3 C 2 T x interface can also greatly reduce the PL intensity of WS 2 [32].…”

Section: Optical Characterization Of Ws 2 /Ti 3 C 2 T X Mxenementioning

confidence: 85%

“…In contrast to TMDs, Ti 3 C 2 mxene has recently also drawn much attention owing to its high conductivity as 4.2 × 10 −4 S/m [7][8][9]. The Ti 3 C 2 mxene is also a layered structure material within which each layer contains two carbon atom planes sandwiched between three Ti atom planes [10].…”

Section: Introductionmentioning

confidence: 99%

Growth of WS2 flakes on Ti3C2Tx Mxene Using Vapor Transportation Routine

Wang

et al. 2018

Coatings

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Two-dimensional dichalcogenides (TMDs) and mxene junctions had been predicted to possess distinct tunable electronic properties. However, direct synthesis of WS 2 on Ti 3 C 2 T x mxene is still challenging. Herein, we successfully deposited WS 2 onto the surface of Ti 3 C 2 T x mxene by employing the vapor transportation (VT) routine. By modulating pressure and source-sample distance, multilayer and monolayer (1 L) WS 2 flakes were deposited onto the lateral side and top surface of Ti 3 C 2 T x flakes. The 1 L WS 2 flakes growing on lateral side of Ti 3 C 2 T x flake have much higher photoluminescence (PL) intensity than 1 L flakes growing on the top surface. Our study has the potential to benefit the design and preparation of novel electronic and electrochemical devices based on TMDs/mxene junctions.

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“…However, to date, by far the most studied remains the first MXene discovered: Ti 3 C 2 T x [13]. This material has shown outstanding performance as an electrode material for supercapacitors and Li battery electrodes [17][18][19][20], electromagnetic shielding [21][22][23], among a slew of other applications [24,25].…”

Section: Introductionmentioning

confidence: 99%

Transparent, conductive solution processed spincast 2D Ti₂CT_x (MXene) films

Ying

Dillon

Fafarman

et al. 2017

Materials Research Letters

130

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Herein, we spincast aqueous colloidal Ti 2 CT x (MXene) solutions into conductive, transparent films with figures of merit (FOM), that are as good as Ti 3 C 2 T x or un-doped chemically vapor-deposited graphene. When normalized by the number of transition metal atoms, the FOM is the highest ever reported for a MXene film. At about 2.7 × 10 5 cm -1 the absorbance coefficient of Ti 2 CT x is quite comparable to that of Ti 3 C 2 T x . Quantitative relationships between film properties-conductance and transparency-and colloidal solution concentration and spin speeds are developed providing a road map for future work. IMPACT STATEMENTIn a first, we spincast aqueous colloidal Ti 2 CT x (MXene) solutions into conductive, transparent films with figures of merit-5-that are as good as Ti 3 C 2 T x or un-doped CVD graphene. ARTICLE HISTORY

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Ti₃C₂ MXenes with Modified Surface for High-Performance Electromagnetic Absorption and Shielding in the X-Band

Cited by 800 publications

References 61 publications

Room Temperature Oxidation of Ti₃C₂MXene for Supercapacitor Electrodes

Room Temperature Oxidation of Ti₃C₂MXene for Supercapacitor Electrodes

Growth of WS2 flakes on Ti3C2Tx Mxene Using Vapor Transportation Routine

Transparent, conductive solution processed spincast 2D Ti₂CT_x (MXene) films

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Ti3C2 MXenes with Modified Surface for High-Performance Electromagnetic Absorption and Shielding in the X-Band

Cited by 800 publications

References 61 publications

Room Temperature Oxidation of Ti3C2MXene for Supercapacitor Electrodes

Room Temperature Oxidation of Ti3C2MXene for Supercapacitor Electrodes

Growth of WS2 flakes on Ti3C2Tx Mxene Using Vapor Transportation Routine

Transparent, conductive solution processed spincast 2D Ti2CTx (MXene) films

Contact Info

Product

Resources

About

Ti₃C₂ MXenes with Modified Surface for High-Performance Electromagnetic Absorption and Shielding in the X-Band

Room Temperature Oxidation of Ti₃C₂MXene for Supercapacitor Electrodes

Room Temperature Oxidation of Ti₃C₂MXene for Supercapacitor Electrodes

Transparent, conductive solution processed spincast 2D Ti₂CT_x (MXene) films