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Facile Synthesis of Sustainable Biomass-Derived Porous Biochars as Promising Electrode Materials for High-Performance Supercapacitor Applications

Lima, Ravi Moreno Araujo Pinheiro and Simões Dos Reis, Glaydson and Thyrel, Mikael and Alcaraz-Espinoza, Jose Jarib and Larsson, Sylvia and de Oliveira, Helinando Pequeno (2022). Facile Synthesis of Sustainable Biomass-Derived Porous Biochars as Promising Electrode Materials for High-Performance Supercapacitor Applications. Nanomaterials. 12 :5 , 866
[Research article]

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Abstract

Preparing sustainable and highly efficient biochars as electrodes remains a challenge for building green energy storage devices. In this study, efficient carbon electrodes for supercapacitors were prepared via a facile and sustainable single-step pyrolysis method using spruce bark as a biomass precursor. Herein, biochars activated by KOH and ZnCl2 are explored as templates to be applied to prepare electrodes for supercapacitors. The physical and chemical properties of biochars for application as supercapacitors electrodes were strongly affected by factors such as the nature of the activators and the meso/microporosity, which is a critical condition that affects the internal resistance and diffusive conditions for the charge accumulation process in a real supercapacitor. Results confirmed a lower internal resistance and higher phase angle for devices prepared with ZnCl2 in association with a higher mesoporosity degree and distribution of Zn residues into the matrix. The ZnCl2-activated biochar electrodes' areal capacitance reached values of 342 mF cm(-2) due to the interaction of electrical double-layer capacitance/pseudocapacitance mechanisms in a matrix that favors hydrophilic interactions and the permeation of electrolytes into the pores. The results obtained in this work strongly suggest that the spruce bark can be considered a high-efficiency precursor for biobased electrode preparation to be employed in SCs.

Authors/Creators:Lima, Ravi Moreno Araujo Pinheiro and Simões Dos Reis, Glaydson and Thyrel, Mikael and Alcaraz-Espinoza, Jose Jarib and Larsson, Sylvia and de Oliveira, Helinando Pequeno
Title:Facile Synthesis of Sustainable Biomass-Derived Porous Biochars as Promising Electrode Materials for High-Performance Supercapacitor Applications
Series Name/Journal:Nanomaterials
Year of publishing :2022
Volume:12
Number:5
Article number:866
Number of Pages:17
Publisher:MDPI
ISSN:2079-4991
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 104 Chemical Sciences > Materials Chemistry
(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 209 Industrial Biotechnology > Bio Materials
Keywords:spruce bark electrodes, spruce bark-supercapacitors, impedance, areal capacitance, electrical double layer capacitance
URN:NBN:urn:nbn:se:slu:epsilon-p-116594
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116594
Additional ID:
Type of IDID
DOI10.3390/nano12050866
Web of Science (WoS)000771670800001
ID Code:27558
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:19 Apr 2022 06:25
Metadata Last Modified:19 Apr 2022 06:31

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