Synergies of vertical graphene and manganese dioxide in enhancing the energy density of carbon fibre-based structural supercapacitors

Sha, Zuoliang; Huang, Feng; Zhou, Yang; Zhang, Jin; Wu, Shuying; Chen, Junyan; Brown, Suzanne; Peng, Shuhua; Han, Zhaojun; Wang, Chun H.

doi:10.1016/j.compscitech.2020.108568

Cited by 79 publications

(39 citation statements)

References 49 publications

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“…A strain sensor based on this conductive nanocomposite with hybrid nanofillers shows excellent stability and wide strain sensing range (100%) and can be used to monitor the movements of the prosthetic finger. Hybrid conductive nanocomposites have also been utilized to improve the energy-storage performance of structural supercapacitors . By surface modification of carbon fiber electrodes with both vertical graphene and manganese dioxide, the areal capacitance of the assembled structural supercapacitors can be increased more than 2 times comparing with the ones with single nanomaterial.…”

Section: Conductive Fillersmentioning

confidence: 99%

Conductive Polymer Nanocomposites for Stretchable Electronics: Material Selection, Design, and Applications

Peng

et al. 2021

ACS Appl. Mater. Interfaces

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128

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Stretchable electronics that can elongate elastically as well as flex are crucial to a wide range of emerging technologies, such as wearable medical devices, electronic skin, and soft robotics. Critical to stretchable electronics is their ability to withstand large mechanical strain without failure while retaining their electrical conduction properties, a feat significantly beyond traditional metals and silicon-based semiconductors. Herein, we present a review of the recent advances in stretchable conductive polymer nanocomposites with exceptional stretchability and electrical properties, which have the potential to transform a wide range of applications, including wearable sensors for biophysical signals, stretchable conductors and electrodes, and deformable energy-harvesting and -storage devices. Critical to achieving these stretching properties are the judicious selection and hybridization of nanomaterials, novel microstructure designs, and facile fabrication processes, which are the focus of this Review. To highlight the potentials of conductive nanocomposites, a summary of some recent important applications is presented, including COVID-19 remote monitoring, connected health, electronic skin for augmented intelligence, and soft robotics. Finally, perspectives on future challenges and new research opportunities are also presented and discussed.

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Section: Conductive Fillersmentioning

confidence: 99%

Conductive Polymer Nanocomposites for Stretchable Electronics: Material Selection, Design, and Applications

Peng

et al. 2021

ACS Appl. Mater. Interfaces

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128

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“…After the electrolyte ions (Na + ) had been inserted, the pseudocapacitive mechanism in the Mn 3 O 4 redox process was as follows The galvanostatic charge–discharge (GCD) curves of manganese oxide with the most appropriate Mn 2+ /Mn 3+ ratio had a symmetrical triangular shape (Figure c and others in Figure S5), indicating an ideal capacitive behavior. In addition, the IR drop on the discharge voltage occurred due to the equivalent series resistance and discharge current; meanwhile, the reaction mainly occurring in the electrode/electrolyte interface was also the reason. , The capacitive values of the supercapacitor calculated based on the GCD curves were 274, 210, 186, and 160 F g –1 (current density with 1, 2, 3, and 5 A g –1 ). Even when the current density reached 10 A g –1 , the SC still reached 130 F g –1 .…”

Section: Resultsmentioning

confidence: 99%

Over-Reduction-Controlled Mixed-Valent Manganese Oxide with Tunable Mn²⁺/Mn³⁺ Ratio for High-Performance Asymmetric Supercapacitor with Enhanced Cycling Stability

Fang

et al. 2021

Langmuir

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Manganese oxides composed of various valence states Mn x+ (x = 2, 3, and 4) have attracted wide attention as promising electrode materials for asymmetric supercapacitor. However, the poor electrical conductivity limited their performance and application. Appropriate regulation content of Mn x+ in mixed-valent manganese oxide can tune the electronic structure and further improve their conductivity and performance. Herein, we prepared manganese oxides with different Mn2+/Mn3+ ratios through an over-reduction (OR) strategy for tuning the internal electron structure of mixed-valent manganese, which could make these material oxides a good platform for researching the structure–property relationships. The Mn2+/Mn3+ ratio of manganese oxide could be precisely tuned from 0.6 to 1.7 by controlling the amount of reducing agent for manipulating the redox processes, where the manganese oxide electrode with the most appropriate Mn2+/Mn3+ ratio, as 1.65 (OR4) exhibits large capacitance (274 F g–1) and the assembling asymmetric supercapacitors by combining OR4 (positive) and the commercial activated carbon (as negative) achieved large 2.0 V voltage window and high energy density of 27.7 Wh kg–1 (power density of 500 W kg–1). The cycle lifespan of the OR4//AC could keep about 92.9% after 10 000-cycle tests owing to the Jahn–Teller distortion of the Mn(III)O6 octahedron, which is more competitive compared to other work. Moreover, a red-light-emitting diode (LED) can easily be lit for 15 min by two all-solid supercapacitor devices in a series.

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“…Also, the electrical vehicle industry has an eye on this technology on account of their short charge rates, long lifetime, and small volume making them suitable for fast recharging vehicles used in short-frequent trips. 39 Several researchers have recently published advances in SC technology for vehicle applications, 40,41 some of them combine super capacitors with other batteries gaining better performances. [42][43][44][45] SC are also being used in wearable and portable energy storage devices.…”

Section: Super-capacitorsmentioning

confidence: 99%

Last developments in polymers for wearable energy storage devices

Lage-Rivera

Ares‐Pernas

Abad

2022

Intl J of Energy Research

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Our modern and technological society requests enhanced energy storage devices to tackle the current necessities. In addition, wearable electronic devices are being demanding because they offer many facilities to the person wearing it. In this manuscript, a historical review is made about the available energy storage devices focusing on super-capacitors and lithium-ion batteries, since they currently are the most present in the industry, and the possible polymeric materials suitable on wearable energy storage devices. Polymers are a suitable option because they not only possess remarkable mechanical resistance, flexibility, long life-times, easy manufacturing techniques and low cost in addition to they can be environmentally friendly, nontoxic, and even biodegradable too. Moreover, the electrical and electrochemical polymer properties can be tunning with suitable fillers giving to versatile conducting polymer composites with a good cost and properties' ratio. Although the advances are promising, there are still many drawbacks that need to be overcome. Future research should focus on improving both the performance of materials and their processability on an industrial scale, where additive manufacturing offers many possibilities. The sustainability of new energy storage devices should not

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Synergies of vertical graphene and manganese dioxide in enhancing the energy density of carbon fibre-based structural supercapacitors

Cited by 79 publications

References 49 publications

Conductive Polymer Nanocomposites for Stretchable Electronics: Material Selection, Design, and Applications

Conductive Polymer Nanocomposites for Stretchable Electronics: Material Selection, Design, and Applications

Over-Reduction-Controlled Mixed-Valent Manganese Oxide with Tunable Mn²⁺/Mn³⁺ Ratio for High-Performance Asymmetric Supercapacitor with Enhanced Cycling Stability

Last developments in polymers for wearable energy storage devices

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Synergies of vertical graphene and manganese dioxide in enhancing the energy density of carbon fibre-based structural supercapacitors

Cited by 79 publications

References 49 publications

Conductive Polymer Nanocomposites for Stretchable Electronics: Material Selection, Design, and Applications

Conductive Polymer Nanocomposites for Stretchable Electronics: Material Selection, Design, and Applications

Over-Reduction-Controlled Mixed-Valent Manganese Oxide with Tunable Mn2+/Mn3+ Ratio for High-Performance Asymmetric Supercapacitor with Enhanced Cycling Stability

Last developments in polymers for wearable energy storage devices

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Over-Reduction-Controlled Mixed-Valent Manganese Oxide with Tunable Mn²⁺/Mn³⁺ Ratio for High-Performance Asymmetric Supercapacitor with Enhanced Cycling Stability