Herbaceous Biomass Waste-Derived Activated Carbons for Supercapacitors

Han, Ji‐Hye; Lee, Jin Hyung; Roh, Kwang Chul

doi:10.33961/jecst.2018.9.2.157

Cited by 18 publications

(8 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…38,40 The residual percentage weights for untreated HW-and MG-biomass samples were 17.2 and 16.4%, respectively, which may indicate their similar lignocellulosic composition contributing to the decomposition. 35 After pretreating the starting biomass samples via slow oxidative torrefaction at 220−300 °C, significant changes in thermal behavior were observed. There was a significant shift in the starting decomposition temperature and also an increase in the residual weights, particularly for samples torrefied at T ≥ 250 °C.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Highly Porous Carbon through Slow Oxidative Torrefaction, Pyrolysis, and Chemical Activation of Lignocellulosic Biomass for High-Performance Supercapacitors

et al. 2019

View full text Add to dashboard Cite

Seven kinds of highly porous activated carbon were prepared from two different lignocellulosic biomass feedstocks (hybrid willow and miscanthus grass) by utilizing four different processing routes, which generally include variations of the pyrolysis, slow oxidative torrefaction, and KOH chemical activation. The activated carbons were evaluated for potential application within the electrodes of double layer supercapacitors. The synthesized activated carbons showed high specific surface area (up to 3265 m2/g), hierarchical pore structure composed of micro-/meso-/macropores with large pore volume (up to 1.535 cm3/g), and rich oxygen content (10.9–19.2 at. %). Their surface area, pore structure/volume, microstructure, and surface functional groups were highly influenced by processing routes, which in turn determined their electrochemical performance and stability. In particular, pretreating the biomass samples via slow oxidative torrefaction substantially increased their surface area, total pore volume, and meso-/micropore volume, and the surface chemistry of these materials showed a higher concentration of carboxyl groups. The performance of two-electrode symmetrical supercapacitors was evaluated in a 6 M KOH aqueous electrolyte. They exhibited relatively high specific capacitance of 70.2–162.3 F/g under constant current density of 100 mA/g, with a high cycling stability based on the capacitance retention of 95.1–99.9% after 1000 cycles. In addition, an increase of 25.0–62.2 F/g was achieved in specific capacitance by including the pyrolysis and/or slow oxidative torrefaction in the synthesis protocol. The sample (HW-D) that exhibited the best performance also maintained 94.1% of its specific capacitance after 5000 charge/discharge cycles at 100 mA/g. The synthesis strategies including the slow oxidative torrefaction pretreatment showed great promise for preparing low-cost, porous carbon materials from renewable biomass sources that are highly suitable for incorporation in supercapacitors and other electrochemical applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Preparation of Highly Porous Carbon through Slow Oxidative Torrefaction, Pyrolysis, and Chemical Activation of Lignocellulosic Biomass for High-Performance Supercapacitors

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Electrode mass was not mentioned in that paper, although it may have had an impact on the performance of the supercapacitor [24]. Generally, higher electrode mass reduced the specific capacitance [10,11], while slower cycling rates increased the capacitance [25]. Based on the lower usable voltage window, aqueous electrolytes revealed generally lower specific energy than organic electrolytes.…”

Section: Comparison With Other Biobased Supercapacitor Electrodesmentioning

confidence: 95%

“…As a source of the activated carbons, biomass precursors are often used. Examples include specialties (e.g., nanocellulose) and mass products (e.g., paper, textile fibers), as well as waste materials from biorefineries or agriculture [10][11][12]. A comprehensive review covering the literature on the use of polysaccharides as source for these materials showed that there is still large potential for valorizing waste materials into high-performance electrode materials [13].…”

Section: Introductionmentioning

confidence: 99%

Willow Bark for Sustainable Energy Storage Systems

et al. 2020

View full text Add to dashboard Cite

Willow bark is a byproduct from forestry and is obtained at an industrial scale. We upcycled this byproduct in a two-step procedure into sustainable electrode materials for symmetrical supercapacitors using organic electrolytes. The procedure employed precarbonization followed by carbonization using different types of KOH activation protocols. The obtained electrode materials had a hierarchically organized pore structure and featured a high specific surface area (>2500 m2 g−1) and pore volume (up to 1.48 cm3 g−1). The assembled supercapacitors exhibited capacitances up to 147 F g−1 in organic electrolytes concomitant with excellent cycling performance over 10,000 cycles at 0.6 A g−1 using coin cells. The best materials exhibited a capacity retention of 75% when changing scan rates from 2 to 100 mV s−1.

show abstract

“…Various studies have been done on the synthesis of carbon materials for electric storage application from different types of biomass waste with different synthesis methods [20,21]. These studies focused on individual biomass waste as a precursor, while studying the effect of different synthesis parameters, such as the types of doping agent, carbonization temperature, and carbonization method.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Potential of Various Biomass Waste for the Synthesis of Carbon Material for Energy Storage Application

Lim

Pang

et al. 2022

Sustainability

View full text Add to dashboard Cite

The metal–air battery (MAB) has been a promising technology to store energy, with its outstanding energy density, as well as safety features. Yet, the current material used as air cathode is costly and not easily available. This study investigated a few biomass wastes with good potential, including the oil palm empty fruit bunch and garlic peel, as well as the oil palm frond, to determine a sufficiently environmentally-safe, yet efficient, precursor to produce carbon material as an electro-catalyst for MAB. The precursors were carbonized at different temperatures (450, 600, and 700 °C) and time (30, 45, and 60 min) followed by chemical (KOH) activation to synthesize the carbon material. The synthesized materials were subsequently studied through chemical, as well as physical characterization. It was found that PF presented superior tunability that can improve electrical conductivity, due to its ability to produce amorphous carbon particles with a smaller size, consisting of hierarchical porous structure, along with a higher specific surface area of up to 777.62 m2g−1, when carbonized at 600 °C for 60 min. This paper identified that PF has the potential as a sustainable and cost-efficient alternative to carbon nanotube (CNT) as an electro-catalyst for energy storage application, such as MAB.

show abstract

Herbaceous Biomass Waste-Derived Activated Carbons for Supercapacitors

Cited by 18 publications

References 17 publications

Preparation of Highly Porous Carbon through Slow Oxidative Torrefaction, Pyrolysis, and Chemical Activation of Lignocellulosic Biomass for High-Performance Supercapacitors

Preparation of Highly Porous Carbon through Slow Oxidative Torrefaction, Pyrolysis, and Chemical Activation of Lignocellulosic Biomass for High-Performance Supercapacitors

Willow Bark for Sustainable Energy Storage Systems

Investigation on the Potential of Various Biomass Waste for the Synthesis of Carbon Material for Energy Storage Application

Contact Info

Product

Resources

About