Correction: 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/c9ta90093d

Cited by 25 publications

(11 citation statements)

References 52 publications

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“…The peaks at 9.45°, 19.05°, 33.99°, 38.89°, 41.7°, 48.45°, 52.35°, and 56.4° correspond to (002), (004), (101), (104), (105), (107), (108), and (109) planes of MAX phase, respectively 10 . After the etching reaction, the (004) peak shifted toward a lower angle to 18.84°, 32 and (006) Cl‐MXene peak appeared at 28.45° 33 . The intensity of other peaks (101), (104), (105), (107), and (108) was reduced significantly or the peaks disappeared 34 which was similar in trend with ordinary HF‐MXene.…”

Section: Resultsmentioning

confidence: 98%

HF free greener Cl ‐terminated MXene as novel electrocatalyst for overall water splitting in alkaline media

Sarfraz

Mehran

Baig

et al. 2022

Intl J of Energy Research

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Summary Hydrogen and oxygen evolution through electrochemical water splitting is essential for effective and inexpensive production of hydrogen and oxygen, which depends on the development of economical, and extremely active electrocatalysts. Two‐dimensional (2D) nano‐laminated materials are imperious as electrocatalysts due to their phenomenal properties and extensive scope of applications. In this work, we report a greener way of synthesizing MXene without hydrofluoric acid (HF) treatment and demonstrated its excellent electrochemical characteristics as an overall water‐splitting catalyst. Cl‐terminated MXenes (Ti3C2Cl2) were synthesized via a molten salt approach, in which the MAX phase (Ti3AlC2) was reacted with copper chloride (CuCl2) salt followed by thermal treatment at a temperature of 550°C for 5 hours. The resulting Cl‐terminated MXene was characterized by scanning electron microscopy, X‐ray diffraction, transmission electron microscope, Raman, Fourier transform infrared spectroscopy, energy dispersive X‐ray analysis, X‐ray photoelectron spectroscopy, and electrochemical testing was performed in the alkaline media for oxygen evolution reactions (OER) and hydrogen evolution reactions (HER). For OER in 1 M KOH, Cl‐terminated MXene achieves a benchmark of 30 mA cm−2 current density at an overpotential of 330 mV and a Tafel slope of 48 mV dec−1, while HF‐MXene exhibits an overpotential of 390 mV and a Tafel slope of 136 mV dec−1. For HER, Cl‐MXene attains an overpotential of 259 mV, and a Tafel slope of 92 mV dec−1 to achieve the 10 mA cm−2 current density, on the other hand, HF‐MXene achieves an overpotential of 444 mV and a Tafel slope of 311 mV dec−1. Furthermore, the electrocatalyst exhibited excellent long‐term stability of 0.7 V at 100 mA cm−2 current density for 36 hours. The synthesis methodology for greener Cl‐terminated MXene coupled with an outstanding electrocatalytic activity is set to open new avenues of catalyst design for water splitting.

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Section: Resultsmentioning

confidence: 98%

HF free greener Cl ‐terminated MXene as novel electrocatalyst for overall water splitting in alkaline media

Sarfraz

Mehran

Baig

et al. 2022

Intl J of Energy Research

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“…Meanwhile, they exhibit typical rectangular-shaped CV curves in aqueous salt and an ionic electrolyte which indicated EDLC capacitance arises due to cation intercalation inside MXene layers. 31,32 The better electrochemical performance of next-generation SC is greatly dependent on achieving high energy density ( E ). The potential window of PC materials in the asymmetric assembly in an aqueous electrolyte can be widened by using MXene as a negative operating voltage window since carbon-based asymmetric devices are restricted to lower capacitance.…”

Section: Introductionmentioning

confidence: 99%

High performance asymmetric supercapacitors based on Ti₃C₂T_x MXene and electrodeposited spinel NiCo₂S₄ nanostructures

2022

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“…Although the carbon materials have excellent conductivity and electrochemical stability, the relatively expensive price and the complicated fabrication process are against their large-scale preparation and practical application. Comparatively speaking, transition metal sulfides are more desirable owing to their high electrical conductivity and large capacitance. , In all the transition metal sulfides, copper sulfide (CuS) is regarded to be the most prospective electrode material due to its excellent electrical conductivity, easy preparation and low cost. − Therefore, it is expected to combine CuS and PET for flexible conductive electrodes because the PET/CuS electrode shows not only the flexibility and mechanical strength of PET but also the electrical conductivity of CuS. However, it is a challenge to simultaneously realize the good flexibility, excellent electrical conductivity, and outstanding capacitance in applying the PET/CuS electrode to wearable flexible supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Synchronous Dual Roles of Copper Sulfide on the Insulating PET Fabric for High-Performance Portable Flexible Supercapacitors

et al. 2021

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In recent years, low-cost wearable energy storage devices attract much more attention. In this work, the PET/CuS/ PPy composite electrodes are fabricated for portable flexible solidstate supercapacitors (FSSC), originating from the insulating PET fabric substrate. In this occasion, the functional layer of copper sulfide (CuS) are designed and chemically deposited on the insulating PET fabric to synchronously develop its dual functions such as high electrical conductivity and large capacitance. As a result, the PET/CuS/PPy electrode shows a high specific capacitance of 5410 mF cm −2 at 2 mA cm −2 and good cyclic stability (retaining 84.1% after 2000 cycles). This excellent recyclable specific capacitance is ascribed to the outstanding homogenous binder-free conductive morphologies of CuS and PPy, forming the rapid electronic and ionic transfer channels. Especially, the synchronous dual functions of CuS including high electrical conductivity and large capacitance play a more important role in the large specific capacitance. The flexible solid state supercapacitor (FSSC) also bears a superior specific capacitance of 1335 mF cm −2 (10.1 F cm −3 ) at 2 mA cm −2 and an outstanding energy density of 1.4 mW h cm −3 at the power density of 8.4 mW cm −3 , together with fine flexibility and cyclic stability. Four serially connected FSSC devices can easily supply the electric power for LED indicator lights, calculators, and electric fans, indicating the prospective practical applications in portable flexible energy storage devices. This work provides a facile approach to develop the synchronous dual roles of CuS, which will have the extensive applications in wearable flexible E-textiles.

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

Abstract: Correction for ‘A facile method for synthesizing CuS decorated Ti3C2 MXene with enhanced performance for asymmetric supercapacitors’ by Zhihu Pan et al., J. Mater. Chem. A, 2019, DOI: 10.1039/c9ta00085b.

Cited by 25 publications

References 52 publications

HF free greener Cl ‐terminated MXene as novel electrocatalyst for overall water splitting in alkaline media

HF free greener Cl ‐terminated MXene as novel electrocatalyst for overall water splitting in alkaline media

High performance asymmetric supercapacitors based on Ti₃C₂T_x MXene and electrodeposited spinel NiCo₂S₄ nanostructures

Synchronous Dual Roles of Copper Sulfide on the Insulating PET Fabric for High-Performance Portable Flexible Supercapacitors

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

Abstract: Correction for ‘A facile method for synthesizing CuS decorated Ti3C2 MXene with enhanced performance for asymmetric supercapacitors’ by Zhihu Pan et al., J. Mater. Chem. A, 2019, DOI: 10.1039/c9ta00085b.

Cited by 25 publications

References 52 publications

HF free greener Cl ‐terminated MXene as novel electrocatalyst for overall water splitting in alkaline media

HF free greener Cl ‐terminated MXene as novel electrocatalyst for overall water splitting in alkaline media

High performance asymmetric supercapacitors based on Ti3C2Tx MXene and electrodeposited spinel NiCo2S4 nanostructures

Synchronous Dual Roles of Copper Sulfide on the Insulating PET Fabric for High-Performance Portable Flexible Supercapacitors

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

High performance asymmetric supercapacitors based on Ti₃C₂T_x MXene and electrodeposited spinel NiCo₂S₄ nanostructures