Nanocellulose coupled flexible polypyrrole@graphene oxide composite paper electrodes with high volumetric capacitance

Wang, Zhaohui; Tammela, Petter; Strömme, Maria; Nyholm, Leif

doi:10.1039/c4nr07251k

Cited by 122 publications

(83 citation statements)

References 54 publications

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“…Based on the thickness (50 µm) of PBG 10:1 composite films, the volume of PBG 10:1 electrode was calculated with an average density of 0.5 g cm -3 . According to the equation: C v = ρC s , the C v of this electrode was thus calculated to be 278 F cm -3 at 0.4 A g -1 (246 F cm -3 at 2.0 A g -1 ) in asymmetric supercapacitors, which is among the highest values ever reported for carbon-based electrodes (Table S2), such as graphene-cellulose paper (120 F cm -3 ), 46 PNG (198 F cm -3 ) 22 and GN-PPy/CNT (122 F cm -3 at 0.2 A g -1 ). 14 The C v of PBG 10:1 electrode as high as 243 F cm -3 in symmetric supercapacitors is also superior to those of carbon-based electrodes in literature.…”

Section: Resultsmentioning

confidence: 99%

“…polypyrrole, PPy; polyaniline, PANI) deposited or immobilized on GN sheets or bacterial cellulose (BC) nanofibers. [18][19][20][21][22][23][24] Chemically bonded GO/CNT 13 or GO/BC composites 25 were further prepared by taking advantage of oxygen-containing functionalities in GO. Despite its higher pseudocapacitance than rGO, 26 GO exhibits lower electrical conductivity and the remaining oxygen-containing groups may exert negative effect on the electrochemical behaviour of the electrode by reducing the cycling stability and reversibility.…”

Section: Introductionmentioning

confidence: 99%

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Three-Dimensional, Chemically Bonded Polypyrrole/Bacterial Cellulose/Graphene Composites for High-Performance Supercapacitors

2015

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Flexible energy storage systems have recently attracted great interest for portable electronic devices. The functionalization of graphene provides vast platform in tailoring its nanostructure and properties for energy storage via facile processing. Here we first demonstrate the development of chemically bonded graphene oxide and bacterial cellulose hybrid composite coated with polypyrrole for robust and high-efficiency supercapacitor electrodes. The as-prepared composites exhibited a highest electrical conductivity (1320 S m -1 ) and the largest volumetric capacitance (278 F cm -3 ) ever shown by carbon-based electrodes, along with 95.2% retention of 556 F g -1 gravimetric capacitance over 5000 recycling tests in asymmetric supercapacitors. Impressively, the hybrid electrode contributed a 492 F g -1 gravimetric capacitance and 93.5% retention over 2000 recycling in symmetric supercapacitors. The nanostructure and composition of the composites were found to play a crucial role for the performance of these three-dimensional, chemically bonded hybrid composite electrodes. INTRODUCTIONFlexible energy storage systems have recently attracted great interest for applications in portable electronic devices and hybrid electrical vehicles. 1 Supercapacitors (also called electrochemical capacitors) have been widely explored for energy storage application because of their higher power density, cycle efficiency, wide thermal operating range, and lower maintenance cost. 2-5 To date, supercapacitors can be subdivided into two classes: electrochemical double-layer capacitors (EDLCs) and pseudocapacitors. The EDLCs store the energy physically through the adsorption of ions on the surface of the electrodes, whereas pseudocapacitors enable electrochemical energy storage by fast redox reactions occurring between the electrode active material and the electrolyte. 1 Featuring large surface area (ca. 1000 m 2 g -1 ), activated carbon (AC) based electrodes, as the state-of-art electrodes for EDLCs, exhibit large gravimetric capacitance with electrostatic mechanism. However, the existence of large micro/macropores within AC proves to be disadvantageous for the adsorption of the electrolyte on the surface of electrodes, deteriorating the function of capacitors. 5 To address this challenge, intense research efforts have devoted to graphene (GE), a carbon monolayer packed into 2D honeycomb lattice, due to high theoretical surface area (2,630 m 2 g -1 ) 6 and theoretical capacitance (550 F g -1 ) 7 to boost the energy density of such devices. To create a large electrolyte-accessible area, porous graphene-like materials have been developed including GE foam/hydrogel, 8-10 crumpled/wrinkle GE, 11 graphene oxide (GO), 12 and reduced graphene oxide (rGO). 5 However, the lower gravimetric capacitance (100-270 F g -1 and 70-120 F g -1 with aqueous and organic electrolytes, respectively) 12,7 and random restacking of GE sheets make graphene-like materials electrodes uncompetitive to AC in

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three-Dimensional, Chemically Bonded Polypyrrole/Bacterial Cellulose/Graphene Composites for High-Performance Supercapacitors

2015

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“…The nonlinear chronopotentiometry (CP) curves at various current densities demonstrate the attractive pseudocapacitance for hollow mesoporous NCS-MDs electrode in nature, resulting from reversible transition between MS and MSOH (M = Ni or Co), [2][3][4]7] which is in perfect accordance with the CV discussions above (Figure 5a). [36,37] Moreover, they are even higher than some recently reported values for pseudocapacitive electrode materials such as MnO 2 /activated microwave expanded graphite oxide composite (≈640 F cm −3 ), [38] 2D MoS 2 (≈400-700 F cm −3 ), [39] Ti 3 C 2 T x paper (≈450 F cm −3 ), [40] CuO arrays (≈32 F cm −3 ), [41] polypyrrole@graphene oxide composite paper (≈198 F cm −3 ), [42] nanocrystalline FeWO 4 (≈210 F cm −3 ), [43] NCS/graphene (≈388 F cm −3 ), [44] CNT/MnO 2 nanoparticles multilayer electrode (≈315 F cm −3 ), [45] Ni/NiO nanowire thin film (≈38.4 F cm −3 ), [46] carbon nanotube/MnO 2 composite (≈246 F cm −3 ), [47] and carbon/MnO 2 (≈156 F cm −3 ). A plot of SC versus current density is shown in Figure 6b.…”

Section: Three-electrode Electrochemical Evaluationmentioning

confidence: 57%

Uniform Hollow Mesoporous Nickel Cobalt Sulfide Microdumbbells: A Competitive Electrode with Exceptional Gravimetric/Volumetric Pseudocapacitance for High‐Energy‐Density Hybrid Superapacitors

Hou

Bao

Rehan

et al. 2017

Adv Elect Materials

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In this contribution, a facile two‐step hydrothermal protocol to prepare hierarchical uniform hollow mesoporous NiCo2S4 microdumbbells (NCS‐MDs) for advanced supercapacitors is developed. Physicochemical investigations reveal that the as‐obtained NCS‐MDs with mesoporous channels in nanoshells possess high‐content Co(III) and Ni(III) species, large surface area (≈80 m2 g−1)/pore volume (≈0.12 m3 g−1), and high tap density (≈0.8 g cm−3). When evaluated as an attractive pseudocapacitive electrode, the unique NCS‐MDs with mass loading of 7 mg cm−2 exhibit remarkable gravimetric/volumetric specific capacitances of ≈912 F g−1 (≈729 F cm−3) at 3 A g−1, and even ≈767 F g−1 (≈613 F cm−3) at high current density of 10 A g−1. Additionally, capacitive degradations of ≈13% and ≈18% are observed over 5000 continous cycles at current rates of 6 and 10 A g−1, respectively. Furthermore, a high‐energy‐density hybrid device is fabricated by using hollow NCS‐MDs and biomass‐derived activated carbon as positive and negative electrodes, respectively, and delivers striking energy density of ≈35.4 Wh kg−1 at power density of ≈381.2 W kg−1, and excellent electrochemical stability at various rates over 11 000 consecutive cycles. These fascinating features strongly highlight that the as‐resulted hollow mesoporous NCS‐MDs could be highly anticipated as a promising electrode platform for next‐generation hybrid supercapacitors.

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“…have been investigated as good candidates for supercapacitors [9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Among these, hydrothermal carbons (HTCs) with distinctive structure and chemistry, obtained easily through an environmentally friendly process using either pure carbohydrates (glucose, sucrose, starch, cellulose, etc.)…”

Section: Introductionmentioning

confidence: 99%

Hydrangea-like multi-scale carbon hollow submicron spheres with hierarchical pores for high performance supercapacitor electrodes

Guo

Chen

Fang

et al. 2015

Electrochimica Acta

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Nanocellulose coupled flexible polypyrrole@graphene oxide composite paper electrodes with high volumetric capacitance

Cited by 122 publications

References 54 publications

Three-Dimensional, Chemically Bonded Polypyrrole/Bacterial Cellulose/Graphene Composites for High-Performance Supercapacitors

Three-Dimensional, Chemically Bonded Polypyrrole/Bacterial Cellulose/Graphene Composites for High-Performance Supercapacitors

Uniform Hollow Mesoporous Nickel Cobalt Sulfide Microdumbbells: A Competitive Electrode with Exceptional Gravimetric/Volumetric Pseudocapacitance for High‐Energy‐Density Hybrid Superapacitors

Hydrangea-like multi-scale carbon hollow submicron spheres with hierarchical pores for high performance supercapacitor electrodes

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