A novel MnO2/Ti3C2Tx MXene nanocomposite as high performance electrode materials for flexible supercapacitors

Jiang, Hanmei; Wang, Zegao; Yang, Qian; Hanif, Muhammad; Wang, Zhiming; Dong, Lichun; Dong, Mingdong

doi:10.1016/j.electacta.2018.08.096

Cited by 162 publications

(69 citation statements)

References 50 publications

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“…Such as the poly (acrylic acid‐co‐acrylamide) hydrogel electrolytes (134.1 F g −1 ), the P(acrylic acid‐co‐ Acryloyloxyethyltrimethyl ammonium chloride) electrolyte (135.2 F g −1 ) and the P(acrylamide ‐co‐alcohol ethoxylate acryloyl chloride) hydrogel electrolytes (130.3 F g −1 ) we reported earlier. Like the previous reports, the specific capacitors of both capacitors decrease with the increase of discharge current . Furthermore, with the increase of discharge current, both DC‐GPE and LiClO 4 solution show a decrease of specific capacitance.…”

Section: Resultssupporting

confidence: 81%

“…Like the previous reports, the specific capacitors of both capacitors decrease with the increase of discharge current. [32,33] Furthermore, with the increase of discharge current, both DC-GPE and LiClO 4 solution show a decrease of specific capacitance. The DC-GPE can maintain a specific capacitance of 84.2 % as the discharge current increases from 0.5 to 10.5 %.…”

Section: Ionic Transport Mechanism Of Dc-gpementioning

confidence: 99%

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Highly Strong and Tough Double‐Crosslinked Hydrogel Electrolyte for Flexible Supercapacitors

et al. 2020

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Excellent mechanical properties are indispensable for the wide application of supercapacitors and various wearable devices. In this article, a novel double‐crosslinked hydrogel electrolyte (DC‐GPE) is prepared by the combination of the hydrophobic association of acrylamide with the amphiphilic monomer AEO‐9‐AC and the ionic complexation of acrylic acid with Fe3+ for the first time by a two‐step method. Owing to the dual energy dissipation network, the DC‐GPE exhibits an excellent tensile strength of up to 3.1 MPa, an elongation at break of more than 900 % and a toughness of 18.1 MJ m−3, which is far beyond the currently reported hydrogel electrolyte. Moreover, the ionic conductivity of the DC‐GPE achieves as high as 40.1 mS cm−1, which is 3 times higher than the corresponding LiClO4 solution electrolyte (12.3 mS cm−1). Besides, the activated carbon‐based supercapacitor assembled by the DC‐GPE shows excellent electrochemical performance, which is superior to most activated carbon‐based supercapacitors. These results demonstrate that the DC‐GPE shows a great application prospect in wearable devices like supercapacitors. Significantly, the new dual physical cross‐linking strategy improves the contradiction between the strength and the toughness of the gel electrolyte materials. And provides a new solution for preparing high‐strength as well as high‐toughness gel electrolyte.

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Section: Resultssupporting

confidence: 81%

Section: Ionic Transport Mechanism Of Dc-gpementioning

confidence: 99%

Highly Strong and Tough Double‐Crosslinked Hydrogel Electrolyte for Flexible Supercapacitors

et al. 2020

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“…However, each type of material has its advantages and defects. Therefore, composite electrode material is a good choice to compensate for the deficiencies of a single‐electrode material …”

Section: Introductionmentioning

confidence: 99%

A MXene‐Coated Activated Carbon Cloth for Flexible Solid‐State Supercapacitor

et al. 2020

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Herein, a new electrode material HHK‐CC@Ti3C2TX (HHK‐CC = activated carbon cloth, TX = F, O, or OH) for a flexible solid‐state supercapacitor (SSC) is prepared by a simple method. The activated carbon cloth (HHK‐CC) is obtained by treating with potassium permanganate beforehand. The specific area, oxygen‐containing functional group, hydrophilicity, and electrical conductivity of the activated CC are increased significantly after the potassium permanganate treatment. A few layers of Ti3C2TX flakes are coated directly on the HHK‐CC. When the loading Ti3C2TX on the HHK‐CC@Ti3C2TX electrode is 3 mg cm−2, the prepared electrode achieves a high capacitance of 1033 mF cm−2 at the current density of 1 mA cm−2. After assembling as a symmetrical SSC, the flexibility and mechanical strength of the CC are still preserved and no significant capacitance decreasing is observed under the conditions of bending and deformation. The capacitance value remains at 94.2% after 1000 cycles, and a high power density of 0.779 W cm−2 is obtained at the energy density of 4.5 μWh cm−2. This work gives a new strategy for designing flexible supercapacitors.

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“…Dong et al. designed SSCs based on electrodes composed of MnO 2 nanoneedles@Ti 3 C 2 T x MXene nanosheets . The specific capacitance of MnO 2 @Ti 3 C 2 T x tested in a three‐electrode system was 130.5 F g −1 , which was higher than that of bare MnO 2 and bare Ti 3 C 2 T x at 0.2 A g −1 .…”

Section: Applications In Ecsmentioning

confidence: 99%

“…[80] This composite structure could bring new opportunitiesf or developing advanced graphene-based electrode materials for energy devices by balancing the oxygenous groups and electrical conductivity.D ong et al designed SSCs based on electrodes composed of MnO 2 nanoneedles@Ti 3 C 2 T x MXenen anosheets. [81] The specific capacitance of MnO 2 @Ti 3 C 2 T x tested in at hree-electrode system was 130.5 Fg À1 ,w hich was highert han that of bare MnO 2 and bare Ti 3 C 2 T x at 0.2 Ag À1 .T he MnO 2 @Ti 3 C 2 T x MXeneS SCs showed a higher energy density of 0.7 mWh cm À2 at ap owerd ensity of 80.0 mW cm À2 .T he synergistic effect between MnO 2 andT i 3 C 2 T x is significantly affected by the MnO 2 content;t he sample with am ass ratio of one between MnO 2 and Ti 3 C 2 T x exhibits the best electrochemical performance due to maximizing electron transfer and ion diffusion.…”

Section: Symmetric Supercapacitors (Sscs)mentioning

confidence: 99%

Recent Advances of Two‐Dimensional Nanomaterials for Electrochemical Capacitors

et al. 2020

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Two‐dimensional (2D) nanomaterials have drawn a wide range of research interests because of their unique ultrathin layered structures and attractive properties. In particular, the electrochemical properties and great variety of 2D nanomaterials make them highly attractive candidates for electrochemical capacitors, such as supercapacitors, lithium‐ion capacitors, and sodium‐ion capacitors. Herein, a comprehensive review of recent progress towards the application of 2D nanomaterials for electrochemical capacitors is provided. Several typical types of 2D nanomaterials are first briefly introduced, followed by detailed descriptions of their electrochemical capacitor applications. Finally, research perspectives and future research directions of these interesting areas are also provided.

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A novel MnO2/Ti3C2Tx MXene nanocomposite as high performance electrode materials for flexible supercapacitors

Cited by 162 publications

References 50 publications

Highly Strong and Tough Double‐Crosslinked Hydrogel Electrolyte for Flexible Supercapacitors

Highly Strong and Tough Double‐Crosslinked Hydrogel Electrolyte for Flexible Supercapacitors

A MXene‐Coated Activated Carbon Cloth for Flexible Solid‐State Supercapacitor

Recent Advances of Two‐Dimensional Nanomaterials for Electrochemical Capacitors

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