High-Energy-Density Hydrogen-Ion-Rocking-Chair Hybrid Supercapacitors Based on Ti3C2Tx MXene and Carbon Nanotubes Mediated by Redox Active Molecule

Hu, Minmin; Cui, Cong; Shi, Chao; Wu, Zhong‐Shuai; Yang, Jing; Cheng, Renfei; Guang, Tianjia; Wang, Hailong; Lu, Hongxia; Wang, Xiaohui

doi:10.1021/acsnano.9b01762

Cited by 141 publications

(84 citation statements)

References 33 publications

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“…The family of two‐dimensional (2D) metal carbides and nitrides, collectively known as MXene, are interesting materials for building high‐performance supercapacitors . MXenes have a general formula of M n +1 X n T x , where M is an early transition metal such as Ti, X is carbon or nitrogen, and T x indicates the presence of different functional groups (O, OH, and F) on the surface of metal layers, a result of aqueous exfoliation synthesis of MXenes .…”

Section: Physical Properties Of Ti3c2tx Mxene Ti3c2tx/cnf and Cnf Pmentioning

confidence: 99%

Multifunctional Nanocomposites with High Strength and Capacitance Using 2D MXene and 1D Nanocellulose

et al. 2019

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Structural electrode materials that integrate high mechanical strength and high electrochemical performances are attractive as they are indispensable for building lightweight, flexible electronics. [1][2][3] These materials should be able to withstand extreme mechanical stress and deformations while maintaining high charge storage properties, and thereby decrease the electrochemically inactive weight and volume for packaging of devices, especially in limited spaces. [1] Most conventional electrode materials, however, fail to meet both requirements. [4] Some of reported strategies involved using carbon fiber-reinforced composites [5,6] or graphene-based materials [1] as structural electrodes to deliver mechanical strength. These materials, however, fall short on the electrochemi cal energy storage capacitance. Alternatively, metal oxides [7] or conducting polymers [8] can be incorporated to boost the capacitance of the graphene-based materials. The problem is the weak interactions between different components, which results in low mecha nical stability of the final composites. [7,9] Therefore, there is a crucial need for the development of new-generation structural energy storage nanocomposites, which monolithically integrate excellent mechanical properties, high electronic and ionic conductivities, and high charge storage capabilities. A balance should also exist between these properties without substantially sacrificing one property over the other. [1] The family of two-dimensional (2D) metal carbides and nitrides, collectively known as MXene, are interesting materials for building high-performance supercapacitors. [10][11][12][13][14][15][16] MXenes have a general formula of M n+1 X n T x , where M is an early transition metal such as Ti, X is carbon or nitrogen, and T x indicates the presence of different functional groups (O, OH, and F) on the surface of metal layers, a result of aqueous exfoliation synthesis of MXenes. [10,17,18] Ti 3 C 2 T x MXene has been widely reported as a high-performance electrode material either in its pristine form or in hybrids with other guest materials such as poly(vinyl alcohol) (PVA), [18] polypyrrole, [19,20] and polyaniline, [21] as well as in hybridization with other carbon materials such as graphene, [22] carbon nanotubes, [23][24][25] and carbon nanofibers. [26] Most of the MXene hybrid nanocomposites, however, have only shown improvement in either capacitance or mechanical properties while sacrificing one property over the other, and they lack the required mechanical integrityThe family of two-dimensional (2D) metal carbides and nitrides, known as MXenes, are among the most promising electrode materials for supercapacitors thanks to their high metal-like electrical conductivity and surface-functional-group-enabled pseudocapacitance. A major drawback of these materials is, however, the low mechanical strength, which prevents their applications in lightweight, flexible electronics. A strategy of assembling freestanding and mechanically robust MXene (Ti 3 C 2 T x ) nanoco...

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Section: Physical Properties Of Ti3c2tx Mxene Ti3c2tx/cnf and Cnf Pmentioning

confidence: 99%

Multifunctional Nanocomposites with High Strength and Capacitance Using 2D MXene and 1D Nanocellulose

et al. 2019

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“…[ 20–22 ] Working as a negative electrode, Ti 3 C 2 T x showed a stable voltage window of −0.9 V in aqueous acidic electrolyte and −1.2 V in neutral electrolyte. [ 23–26 ] Li et al. also conducted leakage current test for a Ti 3 C 2 T x ‐based device, confirming that the device could work under a voltage window as wide as 2 V. [ 26 ] In addition, Jiang et al.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Rate Capability of Ion‐Accessible Ti₃C₂T_x‐NbN Hybrid Electrodes

Wang

Kuai

et al. 2020

Advanced Energy Materials

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Although 2D Ti3C2Tx is a good candidate for supercapacitors, the restacking of nanosheets hinders the ion transport significantly at high scan rates, especially under practical mass loading (>10 mg cm−2) and thickness (tens of microns). Here, Ti3C2Tx‐NbN hybrid film is designed by self‐assembling Ti3C2Tx with 2D arrays of NbN nanocrystals. Working as an interlayer spacer of Ti3C2Tx, NbN facilitates the ion penetration through its 2D porous structure; even at extremely high scan rates. The hybrid film shows a thickness‐independent rate performance (almost the same rate capabilities from 2 to 20 000 mV s−1) for 3 and 50 µm thick electrodes. Even a 109 µm thick Ti3C2Tx‐NbN electrode shows a better rate performance than 25 µm thick pure Ti3C2Tx electrodes. This method may pave a way to controlling ion transport in electrodes composed of 2D conductive materials, which have potential applications in high‐rate energy storage and beyond.

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“…The results indicate that applying Ti 3 C 2 T x as the negative and rGO as the positive electrode is an effective way to enhance the power and energy densities of the micro‐supercapacitor. Wang's team designed a method to achieve hydrogen ion aqueous‐based hybrid supercapacitors by integrating the negative electrode of Ti 3 C 2 MXene and the positive electrode of redox active hydroquinone (HQ)/carbon nanotubes (Figure b) . The fabricated supercapacitor works in a voltage window of 1.6 V and provides the energy density of 62 Wh kg −1 .…”

Section: Electrochemical Energy Conversion and Storage Applicationsmentioning

confidence: 99%

MXene‐Based Nanocomposites for Energy Conversion and Storage Applications

Zhang

Tian

et al. 2020

Chemistry A European J

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Novel nanomaterials and advanced nanotechnology continuously push forwardt he rapid development of sustainable energy conversion and storage equipment. An emerging family of two-dimensional transition-metal carbides, nitrides and carbonitrides, also known as MXenes, have attracted increasing attention and in depth investigation. Benefitting from their unique intrinsic properties, MXenes have attracted significant attention and they have been considered as promising candidate materials for the development of environmentally friendly energy resources. Al arge number of studies show that MXenes have great potential in energy conversiona nd storagef ields. Despite of their exceptional properties, MXenes also have some inher-ent characteristics, such as low capacities and unstabler etention performances, which severely hinder their prospect applicationsi ne nergy conversion and storage fields. In this Minireview,t he latest progress on MXenes and their hybrid composites with small molecules, polymers, carbon or metal ions, and their applicationsinenergy conversionand storage fields is highlighted, including their use in different types of batteries, supercapacitors, hydrogen/oxygene volution reactions, electromagnetic interference absorption/shielding and solar steam generation. In addition, the critical challenges and further development prospects of MXene-based materials are also introduced.The ORCID identification number(s) for the author(s) of this articlecan be found under: https://doi.

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High-Energy-Density Hydrogen-Ion-Rocking-Chair Hybrid Supercapacitors Based on Ti₃C₂T_x MXene and Carbon Nanotubes Mediated by Redox Active Molecule

Cited by 141 publications

References 33 publications

Multifunctional Nanocomposites with High Strength and Capacitance Using 2D MXene and 1D Nanocellulose

Multifunctional Nanocomposites with High Strength and Capacitance Using 2D MXene and 1D Nanocellulose

Enhanced Rate Capability of Ion‐Accessible Ti₃C₂T_x‐NbN Hybrid Electrodes

MXene‐Based Nanocomposites for Energy Conversion and Storage Applications

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High-Energy-Density Hydrogen-Ion-Rocking-Chair Hybrid Supercapacitors Based on Ti3C2Tx MXene and Carbon Nanotubes Mediated by Redox Active Molecule

Cited by 141 publications

References 33 publications

Multifunctional Nanocomposites with High Strength and Capacitance Using 2D MXene and 1D Nanocellulose

Multifunctional Nanocomposites with High Strength and Capacitance Using 2D MXene and 1D Nanocellulose

Enhanced Rate Capability of Ion‐Accessible Ti3C2Tx‐NbN Hybrid Electrodes

MXene‐Based Nanocomposites for Energy Conversion and Storage Applications

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High-Energy-Density Hydrogen-Ion-Rocking-Chair Hybrid Supercapacitors Based on Ti₃C₂T_x MXene and Carbon Nanotubes Mediated by Redox Active Molecule

Enhanced Rate Capability of Ion‐Accessible Ti₃C₂T_x‐NbN Hybrid Electrodes