Porous nanoplatelets wrapped carbon aerogels by pyrolysis of regenerated bamboo cellulose aerogels as supercapacitor electrodes

Yang, Xi; Fei, Baowei; Ma, Jianfeng; Liu, Xinge; Yang, Shumin; Tian, Guohui; Jiang, Zehui

doi:10.1016/j.carbpol.2017.10.013

Cited by 85 publications

(37 citation statements)

References 33 publications

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“…Figure a shows CV curves measured in a potential window of −1∼0 V (vs.Hg/HgO) at a scan rate of 100 mV s −1 . All the CV curves display a quasi‐rectangular shape and have a slightly wider faradaic peak at about −0.6 V, typically indicating an ideal electrical double‐layer capacitance and pseudo‐capacitance behavior . Pseudo‐capacitance can be attributed to the redox reaction between nitrogen‐containing functional groups and electrolyte ions .…”

Section: Resultsmentioning

confidence: 98%

“…TEM and SEM images in Figure show that there is a lamellae microstructure of the EWC‐2 sample with worm‐like micropores (Figure b), again suggesting that an appropriate amount of KOH (2 g in this work) leads to a large number of micropores uniformly distributed on the surface of carbon which are favorable for the fast diffusion of electrolyte ions. The presence of numerous micropores can greatly amplify the specific surface area and then promote the double layer capacitance of the EWC‐2 sample …”

Section: Resultsmentioning

confidence: 99%

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Biomass‐Derived Porous Carbon Prepared from Egg White for High‐performance Supercapacitor Electrode Materials

et al. 2019

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Using egg white as raw material, the activated carbon materials with nitrogen doping were synthesized by a two‐step method involving carbonization and activation. Structure characterization showed this porous carbon had a three‐dimensional honeycomb structure composed of interconnected micropores and mesopores, which resulted in a high specific surface area of 2918 m2 g−1. Due to KOH activation, the appropriate ratio of micropore to mesopore could optimize the diffusion channel of electrolyte ion and increase the contact area between electrolyte and electrode. Thus the egg white‐derived porous carbon (EWC) showed outstanding electrochemical properties as supercapacitor electrode. In three‐electrode system, a high specific capacitance of 335 F g−1 could be achieved at a current density of 0.5 A g−1, and only 8.3% of capacitance was lost after 10000 cycles. For the symmetrical supercapacitor fabricated with as‐prepared carbon material, it exhibited a specific capacitance of 68 F g−1 and a maximum energy density of 13.6 W h kg−1.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Biomass‐Derived Porous Carbon Prepared from Egg White for High‐performance Supercapacitor Electrode Materials

et al. 2019

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“…The specific capacitance of Chem-900-2( Figure 1a good cycling stability of the Chem-900-2e lectrode material, with ac apacitance retention of approximately 92 %a fter 10 000 charge/discharge cyclesc onducted at 10 Ag À1 within the potential window À1a nd À0.1 Vi nathree-electrode system ( Figure 1d). [49][50][51][52][53][54][55][56][57][58][59][60][61] Apparently,t he high capacitance of Chem-900-2 carbon can be attributed to its advantageous micro-/mesoporous structure. Probably,t he slight decrease in capacitance was caused by spontaneous formation of cracks and exfoliationo ft he electrode active mass at some surface segments as ar esult of gas evolution.…”

Section: Electrochemical Experiments In Athree-electrode Systemmentioning

confidence: 99%

“…Probably,t he slight decrease in capacitance was caused by spontaneous formation of cracks and exfoliationo ft he electrode active mass at some surface segments as ar esult of gas evolution. [62] The majority of carbon materials described in thel iterature [49][50][51][52][53][54][55][56][57][58][59][60][61] have microporouss tructures, whicha re responsible for the high SSA BET values. [49][50][51][52][53][54][55][56][57][58][59][60][61] Apparently,t he high capacitance of Chem-900-2 carbon can be attributed to its advantageous micro-/mesoporous structure.…”

Section: Electrochemical Experiments In Athree-electrode Systemmentioning

confidence: 99%

“…All in all, the Chem-900-2 sample demonstrates an electrochemical performance close to (or higher than) the performances of typical bio-waste derived ACs studied in aqueous KOH electrolyte, [46][47][48] although the SSA of Chem-900-2i su pt oa pproximately four times lower than the SSAs of other carbon materials described in the literature. [49][50][51][52][53][54][55][56][57][58][59][60][61] Apparently,t he high capacitance of Chem-900-2 carbon can be attributed to its advantageous micro-/mesoporous structure. The specific character of porosity substantially determines the capacitance, ando nly the pores accessible to electrolyte ions can form the electrode-electrolyte double layer.…”

Section: Electrochemical Experiments In Athree-electrode Systemmentioning

confidence: 99%

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Sustainable Utilization of Biomass Refinery Wastes for Accessing Activated Carbons and Supercapacitor Electrode Materials

et al. 2018

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Biomass processing wastes (humins) are anticipated to become a large-tonnage solid waste in the near future, owing to the accelerated development of renewable technologies based on utilization of carbohydrates. In this work, the utility of humins as a feedstock for the production of activated carbon by various methods (pyrolysis, physical and chemical activation, or combined approaches) was evaluated. The obtained activated carbons were tested as potential electrode materials for supercapacitor applications and demonstrated combined micro- and mesoporous structures with a good capacitance of 370 F g (at a current density of 0.5 A g ) and good cycling stability with a capacitance retention of 92 % after 10 000 charge/discharge cycles (at 10 A g in 6 m aqueous KOH electrolyte). The applicability of the developed activated carbon for practical usage as a supercapacitor electrode material was demonstrated by its successful utilization in symmetric two-electrode cells and by powering electric devices. These findings provide a new approach to deal with the problem of sustainable wastes utilization and to advance challenging energy storage applications.

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Molecular‐Scale Design of Cellulose‐Based Functional Materials for Flexible Electronic Devices

Pang

Jiang

Zhou

et al. 2020

Adv Elect Materials

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Structural design and self‐assembly at the molecular level provide feasible strategies for constructing materials with novel and unique properties. Cellulose is one of the most abundant bioresources and is renewable, biodegradable, biocompatible, and environmentally friendly. The formation of hydrogen‐bonding networks between the cellulose molecular chains on the one hand gives cellulose a rigid crystalline region and high mechanical strength and on the other hand it causes inconvenience to material design based on the molecular scale. The emergence of eco‐friendly solvents such as ionic liquids and alkali/urea solutions breaks the hydrogen bonds and allows the design of various cellulose‐based functional materials, such as membranes, gels, fibers, and nano/microspheres via structural optimization and molecular self‐assembly. Such functional materials have promising applications in flexible electronic devices, such as electrochemical energy storage devices, sensors, biomimetic electronic skins, and optoelectronic devices. In this review, green solvents for cellulose, the dissolution–recombination process, molecular self‐assembly strategies, advanced applications, and future development prospects for high‐performance cellulose‐based functional materials with unique structures are presented.

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Porous nanoplatelets wrapped carbon aerogels by pyrolysis of regenerated bamboo cellulose aerogels as supercapacitor electrodes

Cited by 85 publications

References 33 publications

Biomass‐Derived Porous Carbon Prepared from Egg White for High‐performance Supercapacitor Electrode Materials

Biomass‐Derived Porous Carbon Prepared from Egg White for High‐performance Supercapacitor Electrode Materials

Sustainable Utilization of Biomass Refinery Wastes for Accessing Activated Carbons and Supercapacitor Electrode Materials

Molecular‐Scale Design of Cellulose‐Based Functional Materials for Flexible Electronic Devices

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