Chitosan/graphene oxide hybrid hydrogel electrode with porous network boosting ultrahigh energy density flexible supercapacitor

Jiang, Chen; Gao, Mingming; Shou-yun, Zhang; Huang, Lang; Yu, Shitao; Song, Zhanqian; Wu, Qiong

doi:10.1016/j.ijbiomac.2022.11.201

Cited by 35 publications

(8 citation statements)

References 50 publications

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“…[ 46 ] The intersection of the half arc and horizontal axis in the high‐frequency region represents the equivalent series resistance (ESR) of the electrodes. [ 74 ] The Nyquist plots show an obvious increase in the ion transport resistance of the electrodes when homogeneously blended with unconducive TOCNFs. Compared with F/MA (1.96 Ω), F/MA/F (2.02 Ω), and MA/F/MA (2.09 Ω) electrodes with high conductivity, FMA shows the highest ESR (4.40 Ω).…”

Section: Resultsmentioning

confidence: 99%

Facile Design of Flexible, Strong, and Highly Conductive MXene‐Based Composite Films for Multifunctional Applications

Wang,

Zhang,

Lai

et al. 2023

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Strong, conductive, and flexible materials with improving ion accessibility have attracted significant attention in electromagnetic interference (EMI) and foldable wearable electronics. However, it still remains a great challenge to realize high performance at the same time for both properties. Herein, a microscale structural design combined with nanostructures strategy to fabricate TOCNF(F)/Ti3C2Tx(M)@AgNW(A) composite films via a facile vacuum filtration process followed by hot pressing (TOCNF = TEMPO‐oxidized cellulose nanofibrils, NW = nanowires) is described. The comparison reveals that different microscale structures can significantly influence the properties of thin films, especially their electrochemical properties. Impressively, the ultrathin MA/F/MA film with enhanced layer in the middle exhibits an excellent tensile strength of 107.9 MPa, an outstanding electrical conductivity of 8.4 × 106 S m−1, and a high SSE/t of 26 014.52 dB cm2 g−1. The assembled asymmetric MA/F/MA//TOCNF@CNT (carbon nanotubes) supercapacitor leads to a significantly high areal energy density of 49.08 µWh cm−2 at a power density of 777.26 µW cm−2. This study proposes an effective strategy to circumvent the trade‐off between EMI performance and electrochemical properties, providing an inspiration for the fabrication of multifunctional films for a wide variety of applications in aerospace, national defense, precision instruments, and next‐generation electronics.

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Section: Resultsmentioning

confidence: 99%

Facile Design of Flexible, Strong, and Highly Conductive MXene‐Based Composite Films for Multifunctional Applications

Wang,

Zhang,

Lai

et al. 2023

Small

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“…However, when compared to those supercapacitors with assembled 3D structures, e.g. nanofiber composite prepared by vacuum filtering [47], GO/cellulose nanofiber films prepared by filtering [48], or chitosan/GO hybrid hydrogel prepared by hydrothermal method [49], our hG wet films exhibit deficient performance. But it is noteworthy that the fabrication process for our hG wet films is relatively time-efficient and cost-efficient.…”

Section: Electrochemical Measurementsmentioning

confidence: 92%

Tuning the water interlayer spacer of microwave-synthesized holey graphene films towards high performance supercapacitor application

Bi,

Jiang,

Sun

et al. 2024

2D Mater.

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Graphene-based electrodes have been extensively investigated for supercapacitor applications. However, their ion diffusion efficiency is often hindered by the graphene restacking phenomenon. Even though holey graphene is fabricated to address this issue by providing ion transport channels, those channels could still be blocked by densely stacked graphene nanosheets. To tackle this challenge, this research aims at improving the ion diffusion efficiency of microwave-synthesized holey graphene films by tuning the water interlayer spacer towards the improved supercapacitor performance. By controlling the vacuum filtration during graphene-based electrode fabrication, we obtain dry films with dense packing and wet films with sparse packing. The SEM images reveal that 20 times larger interlayer distance is constructed in the wet film compared to that in the dry counterpart. The holey graphene wet film delivers a specific capacitance of 239 F/g, ~82% enhancement over the dry film (131 F/g). By an integrated experimental and computational study, we quantitatively show that the interlayer spacing in combination with the nanoholes in the basal plane dominates the ion diffusion rate in holey graphene-based electrodes. Our study concludes that novel hierarchical structures should be further considered even in holey graphene thin films to fully exploit the superior advantages of graphene-based supercapacitors.

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“…Research in recent years has focused much attention on the development of flexible portable electronic devices and energy storage systems, including SCs, based on biodegradable compounds of plant (cellulose, [50,228] starch) and animal (chitosan, [229,230] silk fibroin, [231] collagen, gelatin) origin with a variety of morphologies and functionalities. It is important to note that various natural compounds, theoretically, can be used in the creation of all components of SCs, from gel electrolytes to electrodes, separators, and device housings, which opens up great prospects for the development of fully biodegradable energy storage devices [226,227] …”

Section: Recent Trends In Supercapacitor Researchmentioning

confidence: 99%

Recent Trends in Supercapacitor Research: Sustainability in Energy and Materials

Chernysheva,

Smirnova,

Ananikov

2024

ChemSusChem

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Supercapacitors (SCs) have emerged as critical components in applications ranging from transport to wearable electronics due to their rapid charge‐discharge cycles, high power density, and reliability. This review offers an analysis of recent strides in supercapacitor research, emphasizing pivotal developments in sustainability, electrode materials, electrolytes, and 'smart SCs' designed for modern microelectronics with attributes such as flexibility, stretchability, and biocompatibility. Central to this discourse are two dominant electrode materials: carbon materials (CMs), primarily in Electric Double Layer Capacitors (EDLCs), and pseudocapacitive materials, involving oxides/hydroxides, chalcogenides, metal‐organic frameworks, conductive polymers and metal nitrides such as MXene. Despite EDLCs' historical use, challenges such as low energy density persist, with heteroatom introduction into the carbon lattice posed as a solution. Concurrently, pseudocapacitive materials dominate recent studies, with efficiency enhancement strategies, such as the creation of hybrids based on different types of materials, surface structural engineering and doping, under exploration. Emphasis is given to smart SCs with novel attributes such as self‐charging, self‐healing, biocompatibility, and environmentally conscious designs. In summary, the article underscores the drive in sustainable supercapacitor research to achieve high energy and power density, steering towards SCs that are efficient and versatile and involving bioderived/biocompatible SC materials.

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Chitosan/graphene oxide hybrid hydrogel electrode with porous network boosting ultrahigh energy density flexible supercapacitor

Cited by 35 publications

References 50 publications

Facile Design of Flexible, Strong, and Highly Conductive MXene‐Based Composite Films for Multifunctional Applications

Facile Design of Flexible, Strong, and Highly Conductive MXene‐Based Composite Films for Multifunctional Applications

Tuning the water interlayer spacer of microwave-synthesized holey graphene films towards high performance supercapacitor application

Recent Trends in Supercapacitor Research: Sustainability in Energy and Materials

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