Flexible supercapacitors based on mesoporous nanocrystalline cobalt ammonium phosphates and bacterial cellulose composite electrode

Wannasen, Likkhasit; Swatsitang, Ekaphan; Pinitsoontorn, Supree

doi:10.1002/er.6001

Cited by 16 publications

(6 citation statements)

References 40 publications

(115 reference statements)

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“…Similarly, the TOCN/ RGO/PPy-4 electrode exhibits the highest C A value of 915 mF cm −2 , which is significantly higher than those of RGO or PPy single-component films. Table S1 shows a comparison of PANI/GO/cellulose (48), Co-BC, 48 PPy/BC (50), a TOCN/ rGO/PPy aerogel, 49 a PPy@BC/MXene film, 50 PPy/RGO/ CNTs/BC, 51 and a CMC-PPy@RGO film. 52 The Nyquist plots of all TOCN/RGO/PPy-N electrodes are shown in Figure 5c.…”

Section: Resultsmentioning

confidence: 99%

Layer-by-Layer Self-Assembled TEMPO-Oxidized Cellulose Nanofiber/Reduced Graphene Oxide/Polypyrrole Films for Self-Supporting Flexible Supercapacitor Electrodes

Han

Guo

et al. 2022

ACS Appl. Nano Mater.

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In this study, self-supporting flexible supercapacitor electrodes were prepared by wrapping polypyrrole (PPy) on the surface of the TEMPO-oxidized cellulose nanofiber (TOCN)/reduced graphene oxide (RGO) film using a layer-by-layer selfassembly method under an oil−water separation environment. The obtained film had a three-dimensional-layered structure and exhibited a certain porosity, which is favored for the electrochemical performance. The areal capacitance of the TOCN/RGO/PPy film electrode was as high as 915 mF cm −2 , and 96.6% capacitance was retained after 2000 cycles of charge and discharge. Also, it maintained a higher rate retention of 98.4% after undergoing bending 200 times. These capacitance values are significantly better than RGO or PPy single-component films or their mixture with similar constituents. Furthermore, a solid-state symmetric supercapacitor was assembled by combining the TOCN/RGO/PPy electrode and CNF hydrogel films as a separator, which displayed an excellent specific capacitance of 195.8 F g −1 and a volumetric capacitance of 9.8 F cm −3 at the current density of 0.1 mA cm −2 . Meanwhile, an outstanding energy density of 13.04 Wh kg −1 with a power density of 200.6 W kg −1 was also obtained. These facts fully suggest that the TOCN/RGO/PPy film with a three-dimensional-layered structure in this study is promising for highperformance flexible energy-storage electrodes.

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Section: Resultsmentioning

confidence: 99%

Layer-by-Layer Self-Assembled TEMPO-Oxidized Cellulose Nanofiber/Reduced Graphene Oxide/Polypyrrole Films for Self-Supporting Flexible Supercapacitor Electrodes

Han

Guo

et al. 2022

ACS Appl. Nano Mater.

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“…Owing to elevated specific power and excellent life cycle stability with low cost, the electrochemical supercapacitors (SCs) have fascinated the researchers across the globe 1‐5 . The SCs can be widely utilized in different electronic devices 6 .…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of nickel‐manganese/polyaniline‐based ternary composites for high‐performance supercapattery devices

2021

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Summary The study divulges formation of nickel‐manganese phosphate and polyaniline (NiMn(PO4)2‐PANI)‐based ternary composites at different aspect ratios, synthesized via facile sonochemical method. The composite is utilized for high‐performance energy storage applications. The composite with 30 wt% PANI depicts the best electrochemical performance with maximum specific capacity (Qs) of 847 C g−1 at 0.5 A g−1 in three‐electrode assembly. The supercapattery device is assembled by utilizing NiMn(PO4)2‐PANI and activated carbon. The supercapattery demonstrates outstanding performance by delivering a remarkable specific energy of 71.3 Wh kg−1, and the maximum specific power is 12 686 W kg−1 and capacity retention of 97.6% after 5000 GCD series. Furthermore, the diffusive and capacitive mechanism is evaluated by applying Dunn's model. The b values are calculated to confirm the hybrid nature of the device. The study depicts the potentials of reported ternary composites as self‐supported electrode materials in the development of cost‐effective and efficient energy storage system.

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“…The FTIR spectrum depicted in Figure j provides insights into the chemical bonding states of NH 4 CoPO 4 ·H 2 O, FePO 4 , and FePO 4 /NH 4 CoPO 4 ·H 2 O. Notably, the bands observed at 1664 and 1468 cm –1 can be assigned to the H–O–H and N–H group, while the bands appearing at approximately 936 and 786 cm –1 correspond to the presence of PO 4 3– groups within the structure of NH 4 CoPO 4 ·H 2 O . The presence of the band at 1636 cm –1 in FePO 4 serves as an indication of the H–O–H group, while the bands located at 1000, 884, and 540 cm –1 can be attributed to the PO 4 3– group .…”

Section: Resultsmentioning

confidence: 99%

Strong Electron Interaction at the Amorphous/Crystalline Interface Enables Advanced Oxygen Evolution Reaction

Zhang,

Lin,

Cao

et al. 2024

ACS Sustainable Chem. Eng.

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Incorporating amorphous and crystalline components is undoubtedly a strategy to learn from each other's strengths and complement each other's weaknesses for advanced electrocatalysts. Here, an efficient and stable oxygen evolution reaction (OER) catalyst with an amorphous/crystalline interface is reported. Specifically, a rapid coprecipitation approach is proposed to load amorphous FePO 4 nanoparticles onto crystalline NH 4 CoPO 4 •H 2 O nanosheets, resulting in a fascinating amorphous/crystalline interface. The prominent coupled effect between FePO 4 and NH 4 CoPO 4 •H 2 O is afforded by the interfacial phosphates, which build efficient channels to transfer electrons from Co to Fe. Besides the unique electronic structure, the coupled amorphous/crystalline hybrid facilitates the formation of highly active Co intermediates and accelerates the reaction kinetics and charge transport. Detailed electrochemical characterization reveals that this advantageous interface structure results in a notable decrease in the overpotential of the OER compared to materials with an amorphous phase or crystalline phase alone. The FePO 4 /NH 4 CoPO 4 •H 2 O hybrid exhibits a small overpotential of only 230 mV to achieve a current density of 10 mA cm −2 in 1 M KOH and 220 mV at 1 mA cm −2 in 0.1 M phosphate-buffered solution (PBS), which are much lower than the corresponding values of the pristine ones. It is envisioned that the highly operable amorphous−crystalline interface may open up new opportunities in rational design for advanced electrocatalysts.

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Flexible supercapacitors based on mesoporous nanocrystalline cobalt ammonium phosphates and bacterial cellulose composite electrode

Cited by 16 publications

References 40 publications

Layer-by-Layer Self-Assembled TEMPO-Oxidized Cellulose Nanofiber/Reduced Graphene Oxide/Polypyrrole Films for Self-Supporting Flexible Supercapacitor Electrodes

Layer-by-Layer Self-Assembled TEMPO-Oxidized Cellulose Nanofiber/Reduced Graphene Oxide/Polypyrrole Films for Self-Supporting Flexible Supercapacitor Electrodes

Green synthesis of nickel‐manganese/polyaniline‐based ternary composites for high‐performance supercapattery devices

Strong Electron Interaction at the Amorphous/Crystalline Interface Enables Advanced Oxygen Evolution Reaction

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