A facile method for synthesizing CuS decorated Ti<sub>3</sub>C<sub>2</sub> MXene with enhanced performance for asymmetric supercapacitors

Pan, Zhihu; Cao, Fahai; Hu, Xing; Ji, Xiaohong

doi:10.1039/c9ta00085b

Cited by 315 publications

(155 citation statements)

References 52 publications

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“…Aside from the thermal annealing, the (hydro‐)solvothermal method is also effective for the formation of MXene‐inorganic nanostructure composites with high crystallinity. Pan et al reported a sandwich‐like Ti 3 C 2 /CuS composite through the reaction of Cu(NO 3 ) 2 ·3H 2 O, thioacetamide (TAA) and Ti 3 C 2 powders in the ethylene glycol solution at 150 °C for 9 h . Due to the electrostatic interaction, the positively charged Cu 2+ ions are uniformly attracted onto the surface of negatively charged Ti 3 C 2 , forming a homogeneous composite upon the solvothermal treatment.…”

Section: Mxene Compositesmentioning

confidence: 99%

Two‐Dimensional Transition Metal Carbides and Nitrides (MXenes): Synthesis, Properties, and Electrochemical Energy Storage Applications

Zhang

et al. 2019

Energy & Environ Materials

384

181

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A family of 2D transition metal carbides and nitrides known as MXenes has received increasing attention since the discovery of Ti3C2 in 2011. To date, about 30 different MXenes with well‐defined structures and properties have been synthesized, and many more are theoretically predicted to exist. Due to the numerous assets including excellent mechanical properties, metallic conductivity, unique in‐plane anisotropic structure, tunable band gap, and so on, MXenes rapidly positioned themselves at the forefront of the 2D materials world and have found numerous promising applications. Particular interest is devoted to applications in electrochemical energy storage, whereby 2D MXenes work either as electrodes, additives, separators, or hosts. This review summarizes recent advances in the synthesis, fundamental properties and composites of MXene and highlights the state‐of‐the‐art electrochemical performance of MXene‐based electrodes/devices. The progresses in the field of supercapacitors and Li‐ion batteries, Li‐S batteries, Na‐ and other alkali metal ion batteries are reviewed, and current challenges and new opportunities for MXenes in this surging energy storage field are presented. In the focus of interest is the possibility to boost device‐level performance, particularly that of rechargeable batteries, which are of utmost importance in future energy technologies. Very recently, the 2019 Nobel Prize in Chemistry was awarded to the inventors of the Li‐ion battery. For sure, this will provide an additional stimulation to study fundamental aspects of electrochemical energy storage.

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Section: Mxene Compositesmentioning

confidence: 99%

Two‐Dimensional Transition Metal Carbides and Nitrides (MXenes): Synthesis, Properties, and Electrochemical Energy Storage Applications

Zhang

et al. 2019

Energy & Environ Materials

384

181

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“…[ 23 ] The excellent electrochemical properties of MXenes make them widely applicable for electromagnetic interference shielding, [ 24–25 ] photodegradation, [ 26 ] photovoltaics, [ 27–28 ] electrochemical catalysis, [ 29 ] supercapacitors, and lithium ion batteries. [ 30–32 ] MXenes are prepared from MAX phases by etching the A layer (usually Al or Si) with a strong acid solution such as HF or LiF/HCl. [ 33 ] The general formula of MXenes is M n +1 X n T x ( n = 1–3), where M represents an early transition metal such as Ti, V, Nb, Ta, or Mo, X is C and/or N, and T x represents a surface terminating group such as O, F, and OH.…”

Section: Introductionmentioning

confidence: 99%

Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti₃C₂T_x MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution

Chen

Sun

et al. 2020

Adv Materials Inter

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such as global warming and climate changes. [1][2][3][4] Solar energy is clean and abundant, for example, nearly four million exajoules (4 × 10 18 J) of solar energy reaches the earth annually. [1,5] Conversion of solar energy into chemical energy through photocatalytic decomposition of water to produce hydrogen is one of the suitable approaches to utilize solar energy. [6][7][8][9][10] The different types of fundamental photocatalytic reactions include i) semiconductor-based photocatalysis, ii) dye-sensitized semiconductor-based photo catalysis, iii) quantum dot-based photocatalysis, iv) 2D layered materials-based photocatalysts, and v) plasmonic photocatalysts. [11] Photocatalytic hydrogen evolution reaction (HER) are mainly based on inorganic semiconductor and poly merbased organic semiconductors, for exampl, in a conventional dye-sensitized semiconductor photocatalytic hydrogen production system, the dye molecules are excited to inject electrons into the conduction band of a semiconductor or polymer (inorganic semiconductor TiO 2 or g-C 3 N 4 is usually chosen), then the electrons are quickly captured by the co-catalyst (such as precious metals Efficient photocatalytic hydrogen evolution reaction (HER) in the visibleto-near infrared region at a low cost remains a challenging issue. This work demonstrates the fabrication of organic-inorganic composites by deposition of supramolecular aggregates of a chlorophyll derivative, namely, zinc methyl 3-devinyl-3-hydroxymethyl-pyropheophorbide a (Chl) on the surface of Ti 3 C 2 T x MXene with 2D accordion-like morphology. This composite material isemployed as noble metal-free catalyst in photocatalytic HER under the white light illumination, where Chl serves as a small molecule organic semiconductor component instead of ordinary inorganic and polymer organic semiconductors such as TiO 2 and g-C 3 N 4 , and Ti 3 C 2 T x serves as a co-catalyst. Different composition ratios of Chl/Ti 3 C 2 T x are compared for their light-harvesting ability, morphology, charge transfer efficiency, and photocatalytic performance. The best HER performance is found to be as high as 52 ± 5 µmol h −1 g cat −1 after optimization. Such a large HER activity is attributed to the efficient light harvesting followed by exciton transfer in Chl aggregates and the resultant charge separation at the interface of Chl/Ti 3 C 2 T x .

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“…(Figure d) Those results are higher than some of the carbon‐based anode materials (Table S1), such as carbon nanofibers (104.5 F g −1 ), N,S‐doped carbon‐silica nanospheres (221 F g −1 ) and nitrogen‐doped pomelo mesocarps‐based carbon (223 F g −1 ), etc. In addition, the obtained capacity and rate capability are even comparable or higher than some of the pseudocapacitive anode materials such as Ti 3 C 2 Mxene (169.5 C g −1 , 60 %), hierarchical hollow Ni/VN microsphere (143.2 F g −1 , 70.5 %) and MoO 2 ‐C nanofilm (208.4 F g −1 , 47 %), etc.…”

Section: Resultsmentioning

confidence: 84%

Solid‐State Hybrid Supercapacitor Assembled from a Heterostructured Co−Ni Battery‐like Cathode and Supercapacitor‐Type Highly Disordered Carbon Nanosheets

et al. 2020

ChemElectroChem

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Hybrid at either the mechanism or the device level can lead to a hybridization effect of the kinetics and electrochemical characteristic of a supercapacitor (SC). Herein, a heterostructured NiCo 2 S 4 /Co x Ni 1-x (OH) 2 battery-like cathode material was designed, with which the obtained sample accomplished the combination of excellent electronic and ionic conductivity so as to realize an enhanced faradaic redox storage process. Besides, a SC-type highly capacitive anode material of a N and S codoped porous carbon nanosheets (ACNS) was also fabricated, which exhibits great advantages in terms of its enlarged specific surface area, the ease of introducing pseudocapacitive reactions, and its physical structure. These features directly lead to significant improvements in the electric double-layer capacitor (EDLC)-type electrochemical properties of the carbon anode. The combination of an EDLC-type carbon anode with the redox-reaction-type cathode in a full cell device could potentially lead to a charge storage process that simultaneously integrates the electrophysical and electrochemical processes. For these reasons, the obtained solid-state hybrid SC delivers a wide voltage window of 1.6 V, a high specific capacity of 121.3 C g À 1 , and enhanced energy/power densities of 26.1 Wh kg À 1 /11 kW kg À 1 . The as-assembled device can maintain a high and stable capacity retention of 89.1 % for over 10 000 cycles. The developed hybrid assembly strategy and the electrode combination may provide design guidelines for designing other high-energy hybrid SCs.

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A facile method for synthesizing CuS decorated Ti₃C₂ MXene with enhanced performance for asymmetric supercapacitors

Abstract: A Ti3C2–CuS//Ti3C2 asymmetric supercapacitor device exhibited an energy density of 15.4 W h kg−1 at a power density of 750.2 W kg−1.

Cited by 315 publications

References 52 publications

Two‐Dimensional Transition Metal Carbides and Nitrides (MXenes): Synthesis, Properties, and Electrochemical Energy Storage Applications

Two‐Dimensional Transition Metal Carbides and Nitrides (MXenes): Synthesis, Properties, and Electrochemical Energy Storage Applications

Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti₃C₂T_x MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution

Solid‐State Hybrid Supercapacitor Assembled from a Heterostructured Co−Ni Battery‐like Cathode and Supercapacitor‐Type Highly Disordered Carbon Nanosheets

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A facile method for synthesizing CuS decorated Ti3C2 MXene with enhanced performance for asymmetric supercapacitors

Abstract: A Ti3C2–CuS//Ti3C2 asymmetric supercapacitor device exhibited an energy density of 15.4 W h kg−1 at a power density of 750.2 W kg−1.

Cited by 315 publications

References 52 publications

Two‐Dimensional Transition Metal Carbides and Nitrides (MXenes): Synthesis, Properties, and Electrochemical Energy Storage Applications

Two‐Dimensional Transition Metal Carbides and Nitrides (MXenes): Synthesis, Properties, and Electrochemical Energy Storage Applications

Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti3C2Tx MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution

Solid‐State Hybrid Supercapacitor Assembled from a Heterostructured Co−Ni Battery‐like Cathode and Supercapacitor‐Type Highly Disordered Carbon Nanosheets

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A facile method for synthesizing CuS decorated Ti₃C₂ MXene with enhanced performance for asymmetric supercapacitors

Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti₃C₂T_x MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution