A Conductive and Highly Deformable All‐Pseudocapacitive Composite Paper as Supercapacitor Electrode with Improved Areal and Volumetric Capacitance

Zhou, Jie; Yu, Jiali; Shi, Ludi; Wang, Zhe; Liu, Huichao; Yang, Bo; Li, Cuihua; Zhu, Caizhen; Xu, Jian

doi:10.1002/smll.201803786

Cited by 186 publications

(113 citation statements)

References 53 publications

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“…One approach for enhancing ion transport kinetics in MXene‐based films is largely lowering the MXene mass loading to reduce the ion diffusion resistance . Another is introducing various nanomaterial spacers such as polymers (e.g., polyvinyl alcohol, polypyrrole), carbon materials (e.g., carbon nanotubes, graphene), and metallic oxide/hydroxide (e.g., MnO 2 , Fe(OH) 3 ) to hybridize with MXenes, thereby restraining MXene nanosheet self‐stacking . Although amazing performances such as ultrahigh capacitance and rate performance are achieved, the mass loading of MXene in these films is mostly too low (<1 mg cm −2 ) and some of the ultrahigh performances are based on the calculated results.…”

Section: Introductionmentioning

confidence: 99%

Engineering 3D Ion Transport Channels for Flexible MXene Films with Superior Capacitive Performance

Wang

Xue

et al. 2019

Adv Funct Materials

248

191

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2D MXene materials are of considerable interest for future energy storage. A MXene film could be used as an effective flexible supercapacitor electrode due to its flexibility and, more importantly, its high specific capacitance. However, although it has excellent electronic conductivity, sluggish ionic kinetics within the MXene film becomes a fundamental limitation to the electrochemical performance. To compensate for the relative deficiency, MXene films are frequently reduced to several micrometer dimensions with low mass loading (<1 mg cm−2), to the point of detriment of areal performance and commercial value. Herein, for the first time, the design of a 3D porous MXene/bacterial cellulose (BC) self‐supporting film is reported for ultrahigh capacitance performance (416 F g−1, 2084 mF cm−2) with outstanding mechanical properties and high flexibility, even when the MXene loading reaches 5 mg cm−2. The highly interconnected MXene/BC network enables both excellent electron and ion transport channel. Additionally, a maximum energy density of 252 µWh cm−2 is achieved in an asymmetric supercapacitor, higher than that of all ever‐reported MXene‐based supercapacitors. This work exploits a simple route for assembling 2D MXene materials into 3D porous films as state‐of‐the‐art electrodes for high performance energy storage devices.

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Section: Introductionmentioning

confidence: 99%

Engineering 3D Ion Transport Channels for Flexible MXene Films with Superior Capacitive Performance

Wang

Xue

et al. 2019

Adv Funct Materials

248

191

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“…The issues of energy depletion and greenhouse effect owing to the over-consumption of non-renewable resources urgently require alternative green energy and efficient energy storage devices [1][2][3]. Currently, batteries (e.g., lithium-ion batteries, alkaline zinc-manganese batteries, and lead-acid batteries) and supercapacitors are the main energy storage devices [4][5][6][7]. Owing to their clear advantages (e.g., higher power density, longer cycle life, better cycle stability, and higher safety), supercapacitors are more promising energy storage devices compared with batteries [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, AC is unsuitable for the high-performance ZIC. MXene, a new type of two-dimensional (2D) layered materials with the formula of M n+1 X n T x (M represents the early transition metal, X represents carbon or nitrogen, and T x represents F, O, and OH surface termination, n = 1, 2, 3), is extensively used in the field of energy storage owing to its superior properties of high conductivity, hydrophilic surface, and energy storage mechanism of intercalation/de-intercalation pseudo-capacitance [27][28][29]. Based on the properties and applications of MXene, we believe that MXene is a suitable capacitor-type electrode material for the ZIC.…”

Section: Introductionmentioning

confidence: 99%

A New Free-Standing Aqueous Zinc-Ion Capacitor Based on MnO2–CNTs Cathode and MXene Anode

et al. 2019

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HIGHLIGHTS • A new zinc-ion capacitor (ZIC) was realized by assembling the free-standing manganese dioxide-carbon nanotubes (MnO 2-CNTs) battery-type cathode and MXene (Ti 3 C 2 T x) capacitor-type anode in an aqueous electrolyte. • The large specific capacitance of the MXene anode avoids the mismatch in capacitance between the cathode and anode of the ZIC. • The superior performance of the proposed ZIC makes it a promising candidate for the next-generation energy storage devices. ABSTRACT Restricted by their energy storage mechanism, current energy storage devices have certain drawbacks, such as low power density for batteries and low energy density for supercapacitors. Fortunately, the nearest ion capacitors, such as lithium-ion and sodium-ion capacitors containing battery-type and capacitor-type electrodes, may allow achieving both high energy and power densities. For the inspiration, a new zinc-ion capacitor (ZIC) has been designed and realized by assembling the free-standing manganese dioxide-carbon nanotubes (MnO 2-CNTs) battery-type cathode and MXene (Ti 3 C 2 T x) capacitortype anode in an aqueous electrolyte. The ZIC can avoid the insecurity issues that frequently occurred in lithium-ion and sodium-ion capacitors in organic electrolytes. As expected, the ZIC in an aqueous liquid electrolyte exhibits excellent electrochemical performance (based on the total weight of cathode and anode), such as a high specific capacitance of 115.1 F g −1 (1 mV s −1), high energy density of 98.6 Wh kg −1 (77.5 W kg −1), high power density of 2480.6 W kg −1 (29.7 Wh kg −1), and high capacitance retention of ~ 83.6% of its initial capacitance (15,000 cycles). Even in an aqueous gel electrolyte, the ZIC also exhibits excellent performance. This work provides an essential strategy for designing next-generation high-performance energy storage devices.

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“…Interestingly, the supercapacitors show outstanding mechanical properties even when they are bent to 180°. Similarly, Yu and his colleagues developed a conductive and highly deformable pseudocapacitive paper electrode based on Ti 3 C 2 T x and MnO 2 materials (Figure c) . The obtained Ti 3 C 2 T x /MnO 2 nanocomposite paper electrode reaches 1025 F cm −3 .…”

Section: Electrochemical Energy Conversion and Storage Applicationsmentioning

confidence: 92%

MXene‐Based Nanocomposites for Energy Conversion and Storage Applications

Zhang

Tian

et al. 2020

Chemistry A European J

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Novel nanomaterials and advanced nanotechnology continuously push forwardt he rapid development of sustainable energy conversion and storage equipment. An emerging family of two-dimensional transition-metal carbides, nitrides and carbonitrides, also known as MXenes, have attracted increasing attention and in depth investigation. Benefitting from their unique intrinsic properties, MXenes have attracted significant attention and they have been considered as promising candidate materials for the development of environmentally friendly energy resources. Al arge number of studies show that MXenes have great potential in energy conversiona nd storagef ields. Despite of their exceptional properties, MXenes also have some inher-ent characteristics, such as low capacities and unstabler etention performances, which severely hinder their prospect applicationsi ne nergy conversion and storage fields. In this Minireview,t he latest progress on MXenes and their hybrid composites with small molecules, polymers, carbon or metal ions, and their applicationsinenergy conversionand storage fields is highlighted, including their use in different types of batteries, supercapacitors, hydrogen/oxygene volution reactions, electromagnetic interference absorption/shielding and solar steam generation. In addition, the critical challenges and further development prospects of MXene-based materials are also introduced.The ORCID identification number(s) for the author(s) of this articlecan be found under: https://doi.

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A Conductive and Highly Deformable All‐Pseudocapacitive Composite Paper as Supercapacitor Electrode with Improved Areal and Volumetric Capacitance

Cited by 186 publications

References 53 publications

Engineering 3D Ion Transport Channels for Flexible MXene Films with Superior Capacitive Performance

Engineering 3D Ion Transport Channels for Flexible MXene Films with Superior Capacitive Performance

A New Free-Standing Aqueous Zinc-Ion Capacitor Based on MnO2–CNTs Cathode and MXene Anode

MXene‐Based Nanocomposites for Energy Conversion and Storage Applications

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