Facile synthesis of nitrogen and oxygen co-doped C@Ti3C2 MXene for high performance symmetric supercapacitors

Pan, Zhihu; Ji, Xiaohong

doi:10.1016/j.jpowsour.2019.227068

Cited by 126 publications

(46 citation statements)

References 51 publications

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“…Even at the highest power density of 26 480 μW cm −2 , the solid‐state asymmetric device can achieve a high areal energy density of 117.7 μWh cm −2 , indicative of outstanding rate capability. It is worth noting that the maximum mass density energy of the solid‐state asymmetric device can reach a high 16.3 Wh kg −1 at a power density of 36.7 W kg −1 (Figure 5f), although the mass is based the whole MNCFT and ONCFT electrodes weight in sharp with those supercapacitors including MXene/Graphene (1 V; 10.5 Wh kg −1 ), [ 55 ] C@Ti 3 C 2 (1.2 V; 10.8 Wh kg −1 ), [ 56 ] Ti 3 C 2 /CuS//Ti 3 C 2 (1.5 V; 15.4 Wh kg −1 ), [ 57 ] RuO 2 //Ti 3 C 2 T x (1.5 V; 1.8 Wh kg −1 ), [ 34 ] activated graphene fiber fabric (0.8 V; 5.5 Wh kg −1 ) [ 50 ] ,and N‐doped carbonized cotton (1.0 V; 7.2 Wh kg −1 ). [ 58 ]…”

Section: Resultsmentioning

confidence: 99%

A High‐Performance, Tailorable, Wearable, and Foldable Solid‐State Supercapacitor Enabled by Arranging Pseudocapacitive Groups and MXene Flakes on Textile Electrode Surface

Wang

et al. 2020

Adv Funct Materials

119

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The challenges of solid‐state supercapacitors (SCs) for flexible and wearable electronics still remain in well balancing the electrochemical performance, mechanical stability, and processing technologies. Herein, a high‐performance, tailorable and foldable solid‐state asymmetric supercapacitor is developed via one‐step scalable chemical oxidization and MXene ink painting of N‐doped carbon fiber textile (NCFT) substrate. The employed O/N‐functionalized NCFT (ONCFT) and MXene materials under opposite potentials both incorporate excellent electrochemical behaviors of carbon‐like materials and pseudocapacitive materials, namely high rate capability and pseudocapacitance. By regulating oxidization time and MXene loading, the active layer of MXene decorated NCFT (MNCFT) and ONCFT electrodes analogously present tight skin structure, fundamentally avoiding the risk of active materials detaching from the support during mechanical deformation. As a result, the assembled MNCFT//ONCFT device not only achieves an extended voltage window of 1.6 V, high areal energy density of 277.3 μWh cm−2 and 90% capacitance retention after 30 000 cycles, but also experiences repeated folding tests. Additionally, the design makes it possible to tailor the textile‐based energy storage device (TEESD) into a designed size or shape without impairing its performance for device integration or shape conformable integration. Owing to the whole component fabrication being simple and scalable, the TEESD shows potential practical application.

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Section: Resultsmentioning

confidence: 99%

A High‐Performance, Tailorable, Wearable, and Foldable Solid‐State Supercapacitor Enabled by Arranging Pseudocapacitive Groups and MXene Flakes on Textile Electrode Surface

Wang

et al. 2020

Adv Funct Materials

119

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Section: Hetero‐mxenesmentioning

confidence: 99%

“…Due to the negatively charged surface of MXenes, an ammonium ion can be electrostatically sipped into the interlayer of MXene flakes, and N‐doped MXenes can be obtained by subsequent heat treatment. Therefore, various ammonium salts have been used to fabricate N‐doped MXenes such as ammonium citrate [ 189 ] , ammonium chloride, [ 200 ] and ammonium fluoride (NH 4 F). [ 191 ] As revealed by Pan and Ji, ammonium citrate molecules can be adsorbed on the surface of Ti 3 C 2 sheets and N, OC@Ti 3 C 2 composites can be obtained after calcination in Ar/NH 3 atmosphere.…”

Section: Hetero‐mxenesmentioning

confidence: 99%

“…[ 191 ] As revealed by Pan and Ji, ammonium citrate molecules can be adsorbed on the surface of Ti 3 C 2 sheets and N, OC@Ti 3 C 2 composites can be obtained after calcination in Ar/NH 3 atmosphere. [ 189 ] As shown in Figure 11e, in situ condensation polymerization of ammonium citrate occurs at high temperature and the following carbonization can introduce an N element into Ti 3 C 2 as well as N, O codoped carbon on the surface of Ti 3 C 2 . Similarly, porous N‐Ti 3 C 2 T x was obtained by thermal annealing a mixture of Ti 3 C 2 T x and ammonium chloride at 600 °C under nitrogen atmosphere.…”

Section: Hetero‐mxenesmentioning

confidence: 99%

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Hetero‐MXenes: Theory, Synthesis, and Emerging Applications

et al. 2021

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Since their discovery in 2011, MXenes (abbreviation for transition metal carbides, nitrides, and carbonitrides) have emerged as a rising star in the family of 2D materials owing to their unique properties. Although the primary research interest is still focused on pristine MXenes and their composites, much attention has in recent years been paid also to MXenes with diverse compositions. To this end, this work offers a comprehensive overview of the progress on compositional engineering of MXenes in terms of doping and substituting from theoretical predictions to experimental investigations. Synthesis and properties are briefly introduced for pristine MXenes and then reviewed for hetero‐MXenes. Theoretical calculations regarding the doping/substituting at M, X, and T sites in MXenes and the role of vacancies are summarized. After discussing the synthesis of hetero‐MXenes with metal/nonmetal (N, S, P) elements by in situ and ex situ strategies, the focus turns to their emerging applications in various fields such as energy storage, electrocatalysts, and sensors. Finally, challenges and prospects of hetero‐MXenes are addressed. It is anticipated that this review will be beneficial to bridge the gap between predictions and experiments as well as to guide the future design of hetero‐MXenes with high performance.

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“…Thus, it is necessary to store the idle electric energy. In order to ease the situation, the electric energy storage technology based on batteries, 10 supercapacitors, 11 etc. has emerged.…”

Section: Introductionmentioning

confidence: 99%

Polyethylene Glycol/Carbon Black Shape-Stable Phase Change Composites for Peak Load Regulating of Electric Power System and Corresponding Thermal Energy Storage

Lu¹,

Liu²,

Murugadoss³

et al. 2020

Eng. Sci.

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In this work, a unique electrically conductive polyethylene glycol (PEG)/carbon black (CB) shape-stable phase change composite (SSPCC) for peak load regulating of electric power system was prepared via a vacuum impregnation approach. Scanning electron microscope (SEM), differential scanning calorimeter (DSC) and X-ray diffraction (XRD) were used to study the micro morphology, crystallization behavior, crystallization structure and thermal properties. Leakage test and DSC results showed that when the PEG content in PEG/CB SSPCC was as high as 86 wt%, the phase change enthalpy and relative enthalpy efficiency were up to 147.7 J/g and 95.1%, respectively. Fourier transform infrared (FTIR) and XRD showed no chemical reaction between CB and PEG. Thermal cycling test showed that the PEG/CB SSPCC had excellent thermal stability and thermal reliability. Moreover, the good electro-tothermal conversion ability of PEG/CB SSPCC (0.2 S/m) provided rich possibilities for peak load regulating of electric power system and corresponding thermal energy storage.

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Facile synthesis of nitrogen and oxygen co-doped C@Ti3C2 MXene for high performance symmetric supercapacitors

Cited by 126 publications

References 51 publications

A High‐Performance, Tailorable, Wearable, and Foldable Solid‐State Supercapacitor Enabled by Arranging Pseudocapacitive Groups and MXene Flakes on Textile Electrode Surface

A High‐Performance, Tailorable, Wearable, and Foldable Solid‐State Supercapacitor Enabled by Arranging Pseudocapacitive Groups and MXene Flakes on Textile Electrode Surface

Hetero‐MXenes: Theory, Synthesis, and Emerging Applications

Polyethylene Glycol/Carbon Black Shape-Stable Phase Change Composites for Peak Load Regulating of Electric Power System and Corresponding Thermal Energy Storage

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