Highly Conductive Ti3C2Tx MXene Hybrid Fibers for Flexible and Elastic Fiber‐Shaped Supercapacitors

Zhang, Jizhen; Seyedin, Shayan; Qin, Si; Wang, Zhiyu; Moradi, Sepehr; Yang, Fangli; Lynch, Peter A.; Yang, Wenrong; Liu, Jingquan; Wang, Xungai; Razal, Joselito M.

doi:10.1002/smll.201804732

Cited by 184 publications

(257 citation statements)

References 71 publications

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“…MXene (Ti 3 C 2 ), a fascinating 2D transition metal carbide possessing excellent electrical conductivity (≈10 4 S cm −1 ), favorable hydrophilicity, high tap density (4.0 g cm −3 ), and large capacitance (up to 1500 F cm −3 ) has been regarded as a promising electrode candidate for metal‐ion batteries and SC . Unfortunately, similar to other 2D congeners such as graphene and MoS 2 , the van der Waals force induced sheet‐to‐sheet restacking normally limits the ion/electrolyte transport within electrodes, thereby handicapping the electrochemical performance of MXene.…”

Section: Introductionmentioning

confidence: 99%

Versatile N‐Doped MXene Ink for Printed Electrochemical Energy Storage Application

Fan

Shao

et al. 2019

Advanced Energy Materials

320

242

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Printing is regarded as a revolutionary and feasible technique to guide the fabrication of versatile functional systems with designed architectures. 2D MXenes are nowadays attractive in printed energy storage devices. However, owing to the van der Waals interaction between the MXene layers, the restacking issues within the printed electrodes can significantly impede the ion/electrolyte transport and hence handicap the electrochemical performances. Herein, a melamine formaldehyde templating method is demonstrated to develop crumpled nitrogen‐doped MXene (MXene‐N) nanosheets. The nitrogen doping boosts the electrochemical performances of MXene via enhanced conductivity and redox activity. Accordingly, two types of MXene‐N inks are prepared throughout the optimization of the ink viscosity to fit the 2D screen printing and 3D extrusion printing, respectively. As a result, the screen printed MXene‐N microsupercapacitor delivers an areal capacitance of 70.1 mF cm−2 and outstanding mechanical robustness. Furthermore, the 3D‐printed MXene‐N based supercapacitor manifests an areal capacitance of 8.2 F cm−2 for a three‐layered electrode and readily stores a high areal energy density of 0.42 mWh cm−2. The approach to harnessing such versatile MXene‐N inks offers distinctive insights into the printed energy storage systems with high areal energy density and large scalability.

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Section: Introductionmentioning

confidence: 99%

Versatile N‐Doped MXene Ink for Printed Electrochemical Energy Storage Application

Fan

Shao

et al. 2019

Advanced Energy Materials

320

242

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“…The most commonly studied MXene, 2D Ti 3 C 2 T x (T stands for surface chemical groups such as F, OH, and O), owns the unique combination of metallic conductivity and solution processability, which is resulted from the metallic titanium carbide cores and the surface moieties, respectively. Owing to the excellent solution processability, Ti 3 C 2 T x nanosheets are able to be processed via filtration, wet spinning, and even additive manufacturing, thus making it become a promising material for energy storage, thin film electronics devices, electrocatalysis, and electromagnetic interference (EMI) shielding applications …”

Section: Introductionmentioning

confidence: 99%

Pristine Titanium Carbide MXene Films with Environmentally Stable Conductivity and Superior Mechanical Strength

Chen

Wen

et al. 2019

Adv Funct Materials

160

177

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2D titanium carbide (Ti 3 C 2 T x MXene) has potential application in flexible/ transparent conductors because of its metallic conductivity and solution processability. However, solution-processed Ti 3 C 2 T x films suffer from poor hydration stability and mechanical performance that stem from the presence of intercalants, which are unavoidably introduced during the preparation of Ti 3 C 2 T x suspension. A proton acid colloidal processing approach is developed to remove the extrinsic intercalants in Ti 3 C 2 T x film materials, producing pristine Ti 3 C 2 T x films with significantly enhanced conductivity, mechanical strength, and environmental stability. Typically, pristine Ti 3 C 2 T x films show more than twofold higher conductivity (10 400 S cm −1 vs 4620 S cm −1 ) and up to 11-and 32-times higher strength and strain energy at failure (112 MPa, 1,480 kJ m −3 , vs 10 MPa, 45 kJ m −3 ) than films prepared without proton acid processing. Simultaneously, the conductivity and mechanical integrity of pristine films are also largely retained during the long-term storage in H 2 O/O 2 environment. The improvement in mechanical performance and conductivity is originated from the intrinsic strong interaction between Ti 3 C 2 T x layers, and the absence of extrinsic intercalants makes pristine Ti 3 C 2 T x films stable in humidity by blocking the intercalation of H 2 O/O 2 . This method makes the material more competitive for real-world applications such as electromagnetic interference shielding.

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“…To clearly demonstrate the superiority of the flexible composite electrode, the specific areal and volumetric capacitances of the antimonene/MXene electrode (for convenience, the antimonene/MXene electrode in the following analysis is represented for the hybrid film with 0.1 mg cm −2 antimonene loading density) obtained in H 2 SO 4 and LiCl were compared with other recently reported MXene‐based high‐performance electrodes in Figure f,g . Evidently, the extraordinary areal and volumetric capacitance verify the high efficiency of antimonene in activating the MXene‐based hybrid flexible film in energy storage.…”

Section: Resultsmentioning

confidence: 76%

Antimonene Engineered Highly Deformable Freestanding Electrode with Extraordinarily Improved Energy Storage Performance

Zhou

Yao

et al. 2019

Advanced Energy Materials

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antimonene, representing for a single or few-layer antimony, has been considered as a unique one among other 2D materials due to its strong spin-orbit coupling and a number of extraordinary physical properties. [1,2] While the emergence of a new material brings both excitement and puzzles, until very recently, antimonene was successfully isolated by mechanical exfoliation [3] and liquid phase exfoliation, [4] which offers conditions for studying its applications in an experimental way. In addition, density functional theory (DFT) has allowed researchers to make a number of predictions about antimonene's structural and electronic properties, including puckered lamellar structure, [5] high carrier mobility, [6] large interlayer channel size, [3] and fast ion diffusion, [7] combined with the good electrical conductivity (1.6 × 10 4 S m −1 ) demonstrated by experimental test, [8] rendering antimonene an ideal candidate for electrochemical energy storage applications. As a result, there are several works addressing the utilization of antimonene as an anode material in batteries. [9][10][11] However, as for supercapacitor applications, the explorations are extremely scarce. Until now, only one work reported the basic characterization of antimonene as an electrochemically active material for capacitive energy storage (which demonstrated delightful results), [12] while further design and in-depth investigations of antimonene-based supercapacitor electrode, especially freestanding flexible electrode, are highly favorable.As for the constant evolution of freestanding flexible electrode, MXenes, a new burgeoning family of 2D transition metal carbides, offer a particularly suitable assembly platform due to their highly reversible surface redox reactions, [13] graphene-like flexibility and metallic electrical conductivity (up to 8000 S cm −1 ). [14] As a result, the multistacked MXene "paper" freestanding electrodes demonstrate excellent energy storage performances, which are on the topmost level among conventional freestanding electrodes based on graphene and carbon nanotube. [15,16] However, although breakthroughs were made by pristine MXene films, development of the energy storage performances of MXene-based flexible supercapacitors is still in its infancy.Advanced 2D materials have spurred great interest as a new paradigm in pursuing improved energy storage performance. Herein, for the first time, antimonene is utilized as an effective active component for constructing highly deformable and editable freestanding film electrodes, as the basis of a supercapacitor with record-breaking electrode performance. The insertion of antimonene is able to improve the environmental stability of the antimonene/ MXene composite electrode and remarkably enhance the energy storage capability in both protic and neutral electrolytes. Notably, an ultrahigh specific volumetric capacitance of 4255 F cm −3 is achieved by the electrode tested in a 1 m H 2 SO 4 electrolyte, which represents the state-of-the-art value reported to date for supercapa...

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Highly Conductive Ti₃C₂T_x MXene Hybrid Fibers for Flexible and Elastic Fiber‐Shaped Supercapacitors

Cited by 184 publications

References 71 publications

Versatile N‐Doped MXene Ink for Printed Electrochemical Energy Storage Application

Versatile N‐Doped MXene Ink for Printed Electrochemical Energy Storage Application

Pristine Titanium Carbide MXene Films with Environmentally Stable Conductivity and Superior Mechanical Strength

Antimonene Engineered Highly Deformable Freestanding Electrode with Extraordinarily Improved Energy Storage Performance

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