Flexible freestanding all-MXene hybrid films with enhanced capacitive performance for powering a flex sensor

Li, Zhemin; Dall’Agnese, Yohan; Guo, Jin; Huang, Haifu; Liang, Xianqing; Xu, Shuaikai

doi:10.1039/d0ta05710j

Cited by 63 publications

(26 citation statements)

References 45 publications

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“…The electrochemical performance of this SC is comparable with or even better than many other reported SCs (Table S4, Supporting Information). [ 5,9,43,51–54 ] In particular, this SC provides a maximum energy density of 28.31 Wh kg −1 at a power density of 708.27 W kg −1 , and it can still have an energy density of 20.81 Wh kg −1 at a high power density of 7000 W kg −1 (Figure 3d). This performance is superior to a number of the reported SCs, for example, symmetric CNT/PANI hybrid electrode SC (19.45 Wh kg −1 , 320.5 W kg −1 ), [ 43 ] asymmetric MnO 2 /PANI@PCNF//PCNF SC (87 Wh kg −1 , 330 W kg −1 ), [ 42 ] asymmetric rGO/CoS x //AC SC (10.56 Wh kg −1 , 2250 W kg −1 ), [ 51 ] symmetric MnO 2 /CNT film electrode SC (27 Wh kg −1 , 225 W kg −1 ), [ 55 ] asymmetric CoV 2 O 6 /CNT//AC SC (13.8 Wh kg −1 , 800 W kg −1 ), [ 56 ] symmetric MnS/PANI film electrode SC (32 Wh kg −1 , 320 W kg −1 ), [ 57 ] symmetric PANI@BP FSCs (3.33 Wh kg −1 , 250 W kg −1 ), [ 22 ] asymmetric PANI@Ink//MnO 2 @Ink SC (16 Wh kg −1 , 160 W kg −1 ), [ 58 ] and asymmetric WO 3 ‐RGO//PPy‐RGO SC (0.23 mWh cm −3 , 7.3 mW cm −3 ).…”

Section: Resultsmentioning

confidence: 99%

High Capacitive Antimonene/CNT/PANI Free‐Standing Electrodes for Flexible Supercapacitor Engaged with Self‐Healing Function

Jiang

Luo

et al. 2022

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As a conductive polymer, polyaniline (PANI) has been broadly utilized as an electrode material for highperformance SCs thanks to its large specific capacitance, [3,4] outstanding flexibility, [5][6][7] and environmental stability, let alone its easy synthesis. [8][9][10] Although PANI exhibits a satisfying performance in SCs, its relatively low electric and ionic conductivity resulting from agglomeration will lead to a sluggish redox reaction and thus a deteriorated capacitance under high current density. [11][12][13] This problem should weaken the practicality of PANI electrodes to a certain degree. According to the successful experience of other electrodes that have solved the similar problems, [14][15][16] it is preferable to combine the pseudocapacitive PANI with some conductive and porous materials, which can assist PANI to achieve its full potential via the synergistic effects. [10,[17][18][19] For instance, 2D materials (e.g., graphene) with large and adjustable surfaces could load a large number of PANI nanoparticles with good homogeneity via different means, guaranteeing a fast redox reaction and then a decent rate capability. [17,18,[20][21][22] As an important member of 2D materials, antimonene (Sb) nanosheets present not only a large surface area and high conductivity, [23,24] but also excellent mechanical strength and flexibility. [25,26] A preliminary researchIn virtue of the high electrochemical activity and inherent flexibility, polyaniline (PANI) is an ideal electrode material for flexible supercapacitors (SCs). However, in practical applications, the inevitable agglomeration of PANI leads to low capacitance, poor rate performance, and cycling stability. Here, antimonene (Sb) nanosheets with ultrathin thickness, excellent mechanical strength, and flexibility are introduced into the carbon nanotube (CNT) framework for PANI electrodeposition via simple vacuum filtration, which enables the continuous and uniform growth of PANI. The resultant free-standing Sb/CNT/PANI electrode can thus exhibit a high specific capacitance of 578.57 F g −1 together with a high rate capability. Besides, thanks to the introduction of Sb nanosheets, the agglomeration of PANI during the electrodeposition is improved, which correspondingly alleviates the structural deterioration of PANI during repeated charge/discharge. Thus, the flexible SC assembled by Sb/CNT/PANI electrodes demonstrates both an impressive specific capacitance of 416 F g −1 and outstanding cycling stability over 12 000 cycles. Moreover, this SC device can have a practical self-healing function by employing self-healable polyurethane. The facile strategy reported herein sheds light on the design of high-performance flexible SCs, catering to the needs of portable and wearable electronics.

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Section: Resultsmentioning

confidence: 99%

High Capacitive Antimonene/CNT/PANI Free‐Standing Electrodes for Flexible Supercapacitor Engaged with Self‐Healing Function

Jiang

Luo

et al. 2022

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“…As claimed about the whole class of MXene family earlier, an interesting strategy was employed by coalescing two different MXenes (Ti 3 C 2 T x and Nb 2 CT x ) as hybrid all MXene nanocomposite for superior electrochemical performance by alleviating the demerits and reaping the synergistic effects of both MXenes simultaneously. [ 255 ] The heteroassembly of the hybrid MXene was accomplished by simple vacuum filtration of pre‐etched and organically delaminated MXenes individually to form layer by layer assembly into composite structure that obviously impedes restacking of both MXene effectively aiding better energy storage properties (Figure 17c). The expansion of the interlayer spacings of the hybrid films of Ti MXene intercalated in the Nb MXene was comprehended by the XRD results presented in Figure 17d, where there is a new emergence of peak at 6.1° owing to the interaction of the MXenes that enhances films’ mechanical rigidity.…”

Section: Other Mxene 2d Heterostructuresmentioning

confidence: 99%

Section: Other Mxene 2d Heterostructuresmentioning

confidence: 99%

Insights into 2D/2D MXene Heterostructures for Improved Synergy in Structure toward Next‐Generation Supercapacitors: A Review

Nasrin

Vasudevan

Subramani

et al. 2022

Adv Funct Materials

226

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2D interfacial heterostructures have found an unassailable status in energy storage systems, particularly in supercapacitors citing the intriguing structural and electrochemical characteristics. Exactly a decade ago, MXene, a promising 2D transition metal carbide/nitride/carbonitride was found to possess excellent conductivity, hydrophilicity, laudable charge storage opportunities, and enriched surface functionalities conducive for supercapacitors with inherent challenging shortcomings. To substantially improve, assembled 2D/2D MXene heterostructures exhibit commendable performance backed by the fact of swift increase in research interest. In this review, state‐of‐the‐art research progress in material design and electrochemical performance of 2D/2D MXene heterostructures for supercapacitors are investigated. Discussion is initially on MXene fundamentals including synthesis and energy storage governing properties. Particularly, different preparation including electrostatic assembly, in situ growth, hydrothermal treatment, and objective specific strategies and its implications are elaborated. Especially, the electrochemical interface science, electrode–electrolyte interaction and ion/electron dynamics and synergistic enhancement of MXene/rGO, MXene/LDH, MXene/metal sulfides and timely investigations on other 2D MXene architectures are provided for its compatibility from solid‐state to microsupercapacitors for commerciality. To conclude, a well‐comprehended outlook, key challenges, and prospective research guidelines stretching from fundamental mechanism investigations to material and electrolyte optimizations are presented to encourage advanced 2D MXene architectures for future generation supercapacitors.

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“…As one of the most important core components of supercapacitor, the performance of electrode material has a crucial impact on the electrochemical storage performance of the whole supercapacitor (Nie et al 2020;Li et al 2020;Chen et al 2020;Xiao et al 2020;Bi et al 2020). To the best of knowledge, the electrode materials of supercapacitors can classi ed into into two types according to their charge storage mechanism, namely, electric double layer and pseudo capacitor electrode materials (Thi Suong et al 2020;Zhu et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Fabrication of reduced graphene oxide-cellulose nanofibers based hybrid film with good hydrophilicity and conductivity as electrodes of supercapacitor

et al. 2021

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In this research, a kind of non-carbonized reduced graphene oxide (RGO)-cellulose nano bers (CNF) lm is constructed by a combination of ltration and chemical reduction. In the hybrid, RGO enhances conductivity of CNF, and CNF as an idea spacer not only prevents stacking of RGO but also gives the lm good mechanical properties including mechanical strength and exibility. The synergistic effect of both endows the lm with good electrochemical storage performance and outstanding mechanical properties. The hybrid lm can be directly assembled into a symmetrical supercapacitor that shows an outstanding cycle stability, excellent rate performance, good mechanical strength and exibility. Moreover, the lm presents a high speci c capacitance of 120 mF cm − 2 , energy density of 536 µWh cm − 2 (32 Wh kg − 1) and power density of 193 mW cm − 2 (53 kW kg − 1). Additionally, the lm can be used as a substrate to graft other components.

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Flexible freestanding all-MXene hybrid films with enhanced capacitive performance for powering a flex sensor

Abstract: Stacking different two-dimensional (2D) nanomaterials into composite structures opens an opportunity to fabricate electrodes combining the advantages of the individual nanomaterial. Here, different types of MXene nanosheets are combined to...

Cited by 63 publications

References 45 publications

High Capacitive Antimonene/CNT/PANI Free‐Standing Electrodes for Flexible Supercapacitor Engaged with Self‐Healing Function

High Capacitive Antimonene/CNT/PANI Free‐Standing Electrodes for Flexible Supercapacitor Engaged with Self‐Healing Function

Insights into 2D/2D MXene Heterostructures for Improved Synergy in Structure toward Next‐Generation Supercapacitors: A Review

Fabrication of reduced graphene oxide-cellulose nanofibers based hybrid film with good hydrophilicity and conductivity as electrodes of supercapacitor

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