Biomass derived nitrogen-doped activated carbon and novel biocompatible gel electrolytes for solid-state supercapacitor applications

Selvaraj, Monisha; Balamoorthy, Elamathy; Manivasagam, Thirugnasambandam G.

doi:10.1016/j.est.2023.108543

Cited by 28 publications

(7 citation statements)

References 69 publications

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“…Additionally, their hydrophilic nature boosts the wettability between electrode and electrolyte, significantly enhancing electrochemical activity. 18,39 3.2. Electrochemical Performance of RFAC Electrodes.…”

Section: Resultsmentioning

confidence: 99%

“…These oxygen-containing groups are instrumental in enhancing ion diffusion and transport, thereby improving pseudocapacitance. Additionally, their hydrophilic nature boosts the wettability between electrode and electrolyte, significantly enhancing electrochemical activity. , …”

Section: Resultsmentioning

confidence: 99%

“…Senthilkumar and colleagues 17 utilized tamarind-shell-derived activated carbon combined with a PVA/H 2 SO 4 gel electrolyte to construct solid-state electrochemical double-layer capacitors, demonstrating a specific capacitance of 412 F g −1 and an energy density of 9.166 W h kg −1 at a current density of 1.56 A g −1 . Selvaraj et al 18 employed Na 2 SO 4 , phosphate-buffered saline (PBS), and simulated body fluid (SBF) gel electrolytes to fabricate biocompatible solid-state SCs for powering implantable devices. The use of biomass-derived activated carbon materials in conjunction with diverse electrolytes enables the construction of high-performance SC devices.…”

Section: Introductionmentioning

confidence: 99%

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In Situ O and N Self-Doped Fruit Waste-Derived Microporous Activated Carbon for All-Solid-State Supercapacitors

Wu,

Peng,

Chen

et al. 2024

Energy Fuels

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Activated carbon, known for its simple preparation, cost-effectiveness, physicochemical stability, and wide applicability, has garnered significant attention. As a primary application, supercapacitors focus on developing porous activated carbon materials with high surface area, high porosity, and low cost. Herein, a straightforward and efficient two-step process of high-temperature carbonization and activation was introduced to successfully synthesize Rosa roxburghii Tratt fruit waste-derived porous activated carbon (RFAC) with in situ N and O self-doping. The optimized RFAC-6 possesses an exceptional specific surface area (3952.9 m2 g–1), with micropores constituting up to 99% and a rich presence of heteroatom functional groups. The RFAC-6 electrode demonstrates remarkable specific capacitance (370 F g–1 at 0.5 A g–1), excellent rate capability (69% at 20 A g–1), and outstanding cyclic stability (95% capacity retention after 5000 cycles). To assess the practicality of RFAC-6, symmetric supercapacitors (SSCs) were assembled by using aqueous KOH, ionic liquid ([BMIM]BF4), and solid-state PVA/KOH electrolytes, all exhibiting superior electrochemical performance. Notably, the KOH SSC achieves a high specific capacitance of 91 F g–1 at 0.25 A g–1, the [BMIM]BF4 SSC reaches an ultrahigh energy density of 56.6 W h kg–1 at a power density of 375 W kg–1, and the PVA/KOH SSC maintained 92% of its initial capacity even after 10,000 charge–discharge cycles. The activated carbon material prepared from R. roxburghii Tratt fruit waste exhibits exceptional electrochemical performance in various electrolytes, demonstrating significant potential in the energy storage field.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In Situ O and N Self-Doped Fruit Waste-Derived Microporous Activated Carbon for All-Solid-State Supercapacitors

Wu,

Peng,

Chen

et al. 2024

Energy Fuels

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“…7h). 6–9,35,63–67 To illustrate the usefulness of its high density in real-world applications, two AH-PCs/Na 2 SO 4 /AH-PC supercapacitors are linked in series and are easily powered (Fig. 7i).…”

Section: Resultsmentioning

confidence: 99%

Ammonium persulfate assisted synthesis of ant-nest-like hierarchical porous carbons derived from chitosan for high-performance supercapacitors and zinc-ion hybrid capacitors

Chen,

et al. 2024

J. Mater. Chem. A

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“…Coconut-husk-derived activated carbon was successfully developed by microwave pyrolysis followed by activation in a vacuum furnace under a N 2 atmosphere at different activation agents and different activation temperatures. ,− The detailed synthesis procedure is reported in the Supplementary Information S1. ,,− The schematic representation of the synthesis procedure of activated carbon is depicted in Figure . The sample was labeled as AC KOH 700, AC KOH 800, AC KOH 900, AC HPO 700, AC HPO 800, and AC HPO 900.…”

Section: Methodsmentioning

confidence: 99%

Effect of Activation Environment on Coconut-Husk-Derived Porous Activated Carbon for Renewable Energy Storage Applications

Tomy,

Geethamma,

Aravind

et al. 2024

ACS Sustainable Resour. Manage.

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As a major agro waste of coconut, coconut husk is presented here as a cheap, abundant, novel, and sustainable green source of high-surface-area activated carbon for high-performance supercapacitor electrodes. The present communication satisfies one of the United Nations Sustainable Development Goals (UN goals) as an affordable, reliable, and sustainable solution for the existing energy technologies. The carbonization and the activation via a one-step integrated microwave pyrolysis system and vacuum furnace, respectively, are the production technologies used for the conversion of biomass into activated carbon. The chemical impregnation was performed in two different agents (KOH and H 3 PO 4 ) and three higher activation temperatures (700, 800, and 900 °C), and their physical properties and the supercapacitive performances were analyzed and compared. A high surface area of 1218 m 2 g −1 was achieved for KOH impregnation (AC KOH 900) with a weight ratio of AC to KOH of 1:2 at an activation temperature of 900 °C, yielding an excellent specific capacitance of 342 F g −1 , much higher than that of activated carbon with H 3 PO 4 activation (243 F g −1 ). The energy storage performance was further carried out by fabricating a symmetric supercapacitor device in aqueous and polymer gel (PVA-H 3 PO 4 ) electrolyte media, and excellent cyclic stability of nearly 100% was achieved with high power density for both KOH-and H 3 PO 4 -activated samples at high temperature, which can be interconnected with its enhanced surface area and high porosity that facilitates fast ion transport and improves energy storage performance. The fabricated supercapacitor cells, when used to power two red LEDs, showed a complete discharge at the end of 15 min while a maximum glow for 30 min was achieved for a single LED, which took 1 h for its complete discharge. Furthermore, via the present investigation, coconut-husk-derived activated carbon shows promise as a high capacitance, low cost, and renewable material, consequently suggesting a promising avenue toward high-power, affordable, renewable, and clean energy storage devices.

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Biomass derived nitrogen-doped activated carbon and novel biocompatible gel electrolytes for solid-state supercapacitor applications

Cited by 28 publications

References 69 publications

In Situ O and N Self-Doped Fruit Waste-Derived Microporous Activated Carbon for All-Solid-State Supercapacitors

In Situ O and N Self-Doped Fruit Waste-Derived Microporous Activated Carbon for All-Solid-State Supercapacitors

Ammonium persulfate assisted synthesis of ant-nest-like hierarchical porous carbons derived from chitosan for high-performance supercapacitors and zinc-ion hybrid capacitors

Effect of Activation Environment on Coconut-Husk-Derived Porous Activated Carbon for Renewable Energy Storage Applications

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