High-Performance Supercapacitor Electrode Based on Buckypaper/Polyaniline Composite

Tran, Toan Phuoc; Huu, Quyet

doi:10.1007/s11664-017-5560-3

Cited by 14 publications

(9 citation statements)

References 20 publications

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“…FTIR spectra are shown in Figure . The FTIR spectra for all samples present typical peaks of cellulose at 896 cm –1 (C–H bending), 1031 cm –1 (C–O stretching), 1162 cm –1 (C–O stretching), 1429 cm –1 (alkane C–H bending), 1640 cm –1 (O–H bending of absorbed water), 2897 cm –1 (C–H stretching), and 3333 cm –1 (O–H stretching). ,, PANI gives typical peaks at 798 cm –1 (aromatic C–H out-of-plane bending), 1123 cm –1 (aromatic C–H in-plane bending), 1298 cm –1 (aromatic amine C–N stretching), 1485 cm –1 (benzenoid ring CC stretching), 1566 cm –1 (quinoid ring CC stretching), and 3437 cm –1 (N–H stretching), indicating that PANI is in the emeraldine salt state. ,, These peaks can be observed on the spectra for PANI, nanocellulose/PANI, and nanocellulose/PANI/RGO, indicating that PANI has been successfully coated on the nanocellulose substrate. RGO shows peaks at 690 cm –1 (C–H bending), 1402 cm –1 (C–H bending), and 3138 cm –1 (O–H stretching). ,, Also PANI is adsorbed onto RGO through the amino groups of aniline by alkane bending (1429 cm –1 ), C–H stretching (2897 cm –1 ), and O–H stretching (3333 cm –1 ), indicating that both PANI and RGO have been successfully loaded on the nanocellulose substrate …”

Section: Resultsmentioning

confidence: 93%

An Eco-Friendly, Nanocellulose/RGO/in Situ Formed Polyaniline for Flexible and Free-Standing Supercapacitors

Hsu

Khosrozadeh

et al. 2019

ACS Sustainable Chem. Eng.

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There have been extensive demands for eco-friendly, lightweight, flexible, and high performance supercapacitors for advanced applications like wearable electronics, hybrid electric vehicles, and industrial grid storage. In this work, a metalless nanocellulose-based PANI/RGO electrode with excellent flexibility, mechanical strength, and conductivity was developed and assembled into sandwich-like supercapacitors. Reduced graphene oxide (RGO) was mixed into aniline during the in situ polymerization of PANI to improve conductivity of the composite electrode. This eco-friendly metalless nanocellulose based electrode was fabricated via filtrations driven by a vacuum and assembled into sandwich structures. The ratios between nanocellulose, PANI, and RGO were optimized to achieve both high electrochemical performance and good mechanical properties. The composite electrode has a large active materials mass loading ratio of 16.5 mg/cm2, and the assembled supercapacitor gives small impedance at 3.90 Ω, suggesting an excellent conductivity. This work shows the great potential of developed flexible and lightweight nanocellulose composites in the fabrication of supercapacitors that can be used in a variety of biomedical applications including e-skins.

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Section: Resultsmentioning

confidence: 93%

An Eco-Friendly, Nanocellulose/RGO/in Situ Formed Polyaniline for Flexible and Free-Standing Supercapacitors

Hsu

Khosrozadeh

et al. 2019

ACS Sustainable Chem. Eng.

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“…57,59,60 RGO shows peaks at 690 cm −1 (C−H bending), 1402 cm −1 (C−H bending), and 3138 cm −1 (O−H stretching). 57,59,60 Impact of TA Concentrations on Performance of SCs. To investigate the impact of TA concentrations on electrochemical performance of SCs, the self-healable GelMA-CNC hydrogels were treated with 40%, 60%, 80%, and 100% TA, respectively, for 24 h. The results are shown in Figure 5a and c−e.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

“…The peaks in the spectrum of GelMA include amide I, II, and III groups at 1612, 1520, and 1436 cm –1 , respectively . GelMA-CNC presents typical peaks at 896 cm –1 (C–H bending), 1031 cm –1 (C–O stretching), 1162 cm –1 (C–O stretching), 1429 cm –1 (alkane C–H bending), 1640 cm –1 (O–H bending of absorbed water), and 2897 cm –1 (C–H stretching). ,, TA-GelMA-CNC showed a typically wave at around 3000–3600 cm –1 which is closely related to the formation of hydrogen bonds due to the wavenumber of amine N–H and the galloyl O–H shift in this range. The peak value 3309 cm –1 (GelMA) shifted to 3269 cm –1 (GelMA-TA), indicating the formation of H-bonding .…”

Section: Resultsmentioning

confidence: 99%

“…The results also provide evidence that there was no covalent bonding formed. PANI gives typical peaks at 798 cm –1 (aromatic C–H out-of-plane bending), 1123 cm –1 (aromatic C–H in-plane bending), 1298 cm –1 (aromatic amine C–N stretching), 1485 cm –1 (benzenoid ring CC stretching), 1566 cm –1 (quinoid ring CC stretching), and 3437 cm –1 (N–H stretching), indicating PANI in the emeraldine salt state. ,, RGO shows peaks at 690 cm –1 (C–H bending), 1402 cm –1 (C–H bending), and 3138 cm –1 (O–H stretching). ,, …”

Section: Resultsmentioning

confidence: 99%

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Mussel-Inspired Autonomously Self-Healable All-in-One Supercapacitor with Biocompatible Hydrogel

Hsu

Liu

Wang

et al. 2020

ACS Sustainable Chem. Eng.

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Flexible and self-healable supercapacitors (SCs) show great potential in developing smart energy storage devices for health care electronics, which call for the development of nontoxic, biocompatible, and biodegradable electronics based on natural materials. Most self-healable mechanisms need external stimuli and a long healing time, which limits their practical applications. Herein, we developed a mussel-inspired biocompatible SCs with autonomously self-healing capability through a hybrid system of gelatin methacrylate (GelMA), cellulose nanocrystal (CNC), and tannic acid (TA). Mussel-inspired TA on GelMA-CNC hydrogels were optimized by concentrations and timings to evaluate stress, Young’s modulus, toughness, and compressive tests for further developing electrochemical performance on the hydrogel electrode with polyaniline (PANI) and reduced graphene oxide (RGO). This SC shows an impedance of 5.67 and 6.38 Ω after one healing processing. The specific capacitance, energy density, and power density of the SCs reached 1861.21 mF cm–3, 20.65 mW cm–3, and 595.59 mWh cm–3, and retained 96%, 100%, and 82%, respectively, of their original values after one cut-healing process. This study demonstrates remarkable potential in advanced smart and biocompatible energy storage devices.

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“…The capacitance of the MWCNTs/polyaniline electrode was observed to be 329 F g -1 at 10 mVs -1 . For comparison, Tran et al reported a potentially better-performing supercapacitor based on the in-situ electropolymerization of polyaniline at buckypaper (397 Fg -1 at 10 mV s -1 )66 . Furthermore, Gross et al observed clear performance differences with FAD-GDH based bioanodes with different mediators6 .…”

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confidence: 99%

1. Buckypapers for bioelectrochemical applications

Gross¹,

Holzinger²,

Cosnier³

2019

Bioelectrochemistry

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Buckypapers are self-supporting nanostructured thin films of entangled carbon nanotubes (CNTs), resembling an electronic paper, which are held together by pi-pi stacking and interweaving interactions. Richard Smalley's group first reported the formation of carbon nanotube sheets in 1998 (coining the term "bucky paper") as a method for characterizing the production quality of CNTs. 1 Carbon nanotube buckypapers and their composites have excellent prospects for a wide range of applications from aerospace materials 2 to sensors 3,4 and fuel cells 5,6 , and are thus of interest to a vast research and industrial community. Over the last 5-7 years, buckypaper materials have emerged for the construction of implantable, wearable and portable bioelectronic devices owing to their properties including high conductivity and porosity, flexibility, lightweight, biocompatibility, and the ability for electron transfer with enzymes and microbes 7 . In addition to being used for enzymatic and microbial biofuel cell construction [7][8][9] , buckypapers are also emerging for hybrid supercapacitors 10 , photoelectric biofuel cells 11 , and other bioelectronic systems including biosensors 4,12 , bioreactors 13 and biologic devices 14 .Buckypaper is the accepted term for carbon nanotube sheets, disordered or aligned, formed by vacuum filtration of aqueous (e.g. in the presence of a non-ionic surfactant such as Triton X-100) and non-aqueous dispersions (e.g. in N,N-dimethylformamide, DMF) of single-walled, double-walled and multi-walled carbon nanotubes (SWCNTs, DWCNTs, and MWCNTs) 1,6,15 . Sonication, centrifugation and additional filtration steps are also commonly used to improve the quality and purity of the CNT dispersion prior to filtration through a porous membrane 6,15 . Free-standing "lab-made" buckypaper sheets are finally obtained after washing, drying, and peeling from the underlying membrane."Commercial" buckypaper prepared by continuous manufacturing is a popular type of buckypaper.The MWCNT buckypaper from Buckeye Composites (a division of NanoTechLabs, USA) is the most widely reported commercialized buckypaper for bioelectrochemical applications [16][17][18][19] . In addition to vacuum filtration, lab-made buckypaper can also be prepared via methods including dominopushing 20 , CNT winding 21 and by using a lab-scale hand sheet former 22 . The most common type of buckypapers used in bioelectrochemistry are illustrated in Figure 1.1.Buckypaper fabrication is conceptually straightforward but factors such as dispersion homogeneity, CNT type and chemical functionality, membrane porosity, and the presence of

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High-Performance Supercapacitor Electrode Based on Buckypaper/Polyaniline Composite

Cited by 14 publications

References 20 publications

An Eco-Friendly, Nanocellulose/RGO/in Situ Formed Polyaniline for Flexible and Free-Standing Supercapacitors

An Eco-Friendly, Nanocellulose/RGO/in Situ Formed Polyaniline for Flexible and Free-Standing Supercapacitors

Mussel-Inspired Autonomously Self-Healable All-in-One Supercapacitor with Biocompatible Hydrogel

1. Buckypapers for bioelectrochemical applications

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