Space-confined assembly of all-carbon hybrid fibers for capacitive energy storage: realizing a built-to-order concept for micro-supercapacitors

Jiang, Wenchao; Zhai, Shengli; Qian, Qihui; Yang, Yuan; Karahan, H. Enis; Wei, Li; Goh, Kunli; Ng, Andrew Keong; Wei, Jun; Chen, Yuan

doi:10.1039/c5ee02703a

Cited by 98 publications

(111 citation statements)

References 99 publications

(138 reference statements)

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“…The highest specific capacitances (denoted as C L , C A , and C V ) for the flexible biscrolled supercapacitor were 60.6 mF cm −1 , 888.7 mF cm −2 and 154.7 F cm −3 , respectively, when measured at a current density of 2.3 mA cm −2 and based on the dimensions of a single electrode. These capacitances are higher than that reported for yarn or fibre-based supercapacitors despite the host of pseudocapacitive materials used1568171822242530. Similarly, the present coil-based stretchable supercapacitors ( C L =17.7 mF cm −1 , C A =382 mF cm −2 , C V =105 F cm −3 ) provide specific capacitances that far exceed equivalent values from previously reported stretchable fibre-based supercapacitors3479142629.…”

Section: Resultscontrasting

confidence: 75%

“…In addition to providing high-density energy storage and fast energy release, these fibres must also be sufficiently robust to be fabricated into textiles by such industrial processes as weaving, knitting and sewing. Important recent advances have increased the energy and power densities of fibre-based supercapacitors123456789101112131415161718192021222324252627282930, some of which also provide high flexibility and stretchability. Yet, the ever advancing applications needs far eclipse presently realized power and energy densities of yarns and fibres and new approaches are needed to bridge this technology gap.…”

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Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

et al. 2016

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Yarn-based supercapacitors having improved performance are needed for existing and emerging wearable applications. Here, we report weavable carbon nanotube yarn supercapacitors having high performance because of high loadings of rapidly accessible charge storage particles (above 90 wt% MnO2). The yarn electrodes are made by a biscrolling process that traps host MnO2 nanoparticles within the galleries of helically scrolled carbon nanotube sheets, which provide strength and electrical conductivity. Despite the high loading of brittle metal oxide particles, the biscrolled solid-state yarn supercapacitors are flexible and can be made elastically stretchable (up to 30% strain) by over-twisting to produce yarn coiling. The maximum areal capacitance of the yarn electrodes were up to 100 times higher than for previously reported fibres or yarn supercapacitors. Similarly, the energy density of complete, solid-state supercapacitors made from biscrolled yarn electrodes with gel electrolyte coating were significantly higher than for previously reported fibre or yarn supercapacitors.

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confidence: 75%

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confidence: 99%

Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

et al. 2016

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“…Recent demand of thin and light micro-supercapacitors for portable electronic devices has made supercapacitors a popular type of power source and energy storage unit [7][8][9][10][11][12][13][14]. Carbonaceous materials, such as activated carbon, carbon nanotubes (CNTs) and graphene, are important and essential electrode materials for use in micro-supercapacitors [2].…”

Section: Introductionmentioning

confidence: 99%

Improved conductivity and capacitance of interdigital carbon microelectrodes through integration with carbon nanotubes for micro-supercapacitors

Yong-ming

Tang

et al. 2016

Nano Res.

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In the last decade, pyrolyzed-carbon-based composites have attracted much attention for their applications in micro-supercapacitors. Although various methods have been investigated to improve the performance of pyrolyzed carbons, such as conductivity, energy storage density and cycling performance, effective methods for the integration and mass-production of pyrolyzed-carbonbased composites on a large scale are lacking. Here, we report the development of an optimized photolithographic technique for the fine micropatterning of photoresist/chitosan-coated carbon nanotube (CHIT-CNT) composite. After subsequent pyrolysis, the fabricated carbon/CHIT-CNT microelectrode-based micro-supercapacitor has a high capacitance (6.09 mF·cm -2 ) and energy density (4.5 mWh·cm -3 ) at a scan rate of 10 mV·s -1 . Additionally, the micro-supercapacitor has a remarkable long-term cyclability, with 99.9% capacitance retention after 10,000 cyclic voltammetry cycles. This design and microfabrication process allow the application of carbon microelectromechanical system (C-MEMS)-based micro-supercapacitors due to their high potential for enhancing the mechanical and electrochemical performance of micro-supercapacitors.

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“…[1][2][3][4][5] During last 5-7 years, we witnessed the rapid improvement of unconventional supercapacitors including high-performance (especially the areal and volumetric properties) supercapacitors, [6][7][8][9] novel structured micro-supercapacitors, [10][11][12] ultrathin and transparent devices, [13,14] flexible all-solid-state supercapacitors, [15][16][17][18][19] and on-chip and large-scale integrated micro-supercapacitors. [1][2][3][4][5] During last 5-7 years, we witnessed the rapid improvement of unconventional supercapacitors including high-performance (especially the areal and volumetric properties) supercapacitors, [6][7][8][9] novel structured micro-supercapacitors, [10][11][12] ultrathin and transparent devices, [13,14] flexible all-solid-state supercapacitors, [15][16][17][18][19] and on-chip and large-scale integrated micro-supercapacitors.…”

mentioning

confidence: 99%

Extraordinary Areal and Volumetric Performance of Flexible Solid‐State Micro‐Supercapacitors Based on Highly Conductive Freestanding Ti₃C₂T_x Films

Huang

Zhang

et al. 2018

Adv Elect Materials

106

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as well as light-weight, remarkable flexibility, and security. [1][2][3][4][5] During last 5-7 years, we witnessed the rapid improvement of unconventional supercapacitors including high-performance (especially the areal and volumetric properties) supercapacitors, [6][7][8][9] novel structured micro-supercapacitors, [10][11][12] ultrathin and transparent devices, [13,14] flexible all-solid-state supercapacitors, [15][16][17][18][19] and on-chip and large-scale integrated micro-supercapacitors. [20][21][22] Although these breakthroughs were made, development of MSCs is still in its infancy. And lots of importance and challenges such as 3D architecture design, highconductive leakage-free electrolytes, low self-discharge effect, large-scale on-chip integration at microscale, high mechanical reliability, and outstanding performances in areal and volumetric need to be further addressed. Similar to conventional supercapacitors with inflexibility and liquid electrolytes, the intrinsic properties of the electrode materials, which are critical to high-performance supercapacitors and the method of electrode fabrication, evidently play the most important role in developing state-of-the-art MSCs. In this respect, it is the key to find one material that possesses both outstanding mechanical flexibility and electrochemical performance.MXenes, one kind of novel 2D materials, are promising candidates for developing state-of-the-art MSCs because of their outstanding electrical conductivity, superior areal and Approaching state-of-the-art areal and volumetric capacitances while maintaining high-power characteristic is a big challenge that promotes practical application of flexible solid-state micro-supercapacitors (MSCs), which have recently attracted great attention with the rapid development of flexible microelectronics. Herein, it is reported that freestanding extrahigh conductive Ti 3 C 2 T x (MXene) films with excellent flexibility and effectively controlled thickness ranging from 1-21 µm performed as excellently scalable and flexible solid-state MSCs owing to their ultrahigh underlying electrical conductivity (up to 1.25 × 10 5 S m −1 ) and self-functionalized surfaces (O, OH, and F terminations). Amazingly, freestanding conductive Ti 3 C 2 T x based flexible solid-state MSCs with interdigital electrodes and polyvinyl alcohol/sulfuric acid (PVA/H 2 SO 4 ) gel electrolyte display outstanding areal capacitances of 340 mF cm −2 at 0.25 mA cm −2 based on the two working electrodes. Moreover, the maximum corresponding volumetric capacitance and energy density of flexible solid-state MSCs reach up to 183 F cm −3 and 12.4 mWh cm −3 , which is on the topmost level among all the unconventional supercapacitors to date. Compared with materials currently used in MSCs, this freestanding conductive Ti 3 C 2 T x shows potential and scalability in increasing overall

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Space-confined assembly of all-carbon hybrid fibers for capacitive energy storage: realizing a built-to-order concept for micro-supercapacitors

Abstract: Customized hybrid carbon fiber supercapacitors with energy across two orders and power across four orders of magnitude.

Cited by 98 publications

References 99 publications

Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

Improved conductivity and capacitance of interdigital carbon microelectrodes through integration with carbon nanotubes for micro-supercapacitors

Extraordinary Areal and Volumetric Performance of Flexible Solid‐State Micro‐Supercapacitors Based on Highly Conductive Freestanding Ti₃C₂T_x Films

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Space-confined assembly of all-carbon hybrid fibers for capacitive energy storage: realizing a built-to-order concept for micro-supercapacitors

Abstract: Customized hybrid carbon fiber supercapacitors with energy across two orders and power across four orders of magnitude.

Cited by 98 publications

References 99 publications

Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

Improvement of system capacitance via weavable superelastic biscrolled yarn supercapacitors

Improved conductivity and capacitance of interdigital carbon microelectrodes through integration with carbon nanotubes for micro-supercapacitors

Extraordinary Areal and Volumetric Performance of Flexible Solid‐State Micro‐Supercapacitors Based on Highly Conductive Freestanding Ti3C2Tx Films

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Extraordinary Areal and Volumetric Performance of Flexible Solid‐State Micro‐Supercapacitors Based on Highly Conductive Freestanding Ti₃C₂T_x Films