Green Carbon Nanofiber Networks for Advanced Energy Storage

Wei, Jiajia; Geng, Shiyu; Pitkänen, Olli; Järvinen, Topias; Kordás, Krisztián; Oksman, Kristiina

doi:10.1021/acsaem.0c00065

Cited by 44 publications

(38 citation statements)

References 67 publications

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“…The flexibility showcases of the CFNs made from KR have already been illustrated in our previous study. 29 The chemical composition of the CFNs from energy dispersive X-ray spectroscopy (EDX) is shown in Table 4, where it is seen that carbon dominates in C-LB200, C-KR200, C-HY200, and C-SD200 with slight variations in the exact quantities. The presence of oxygen indicated the presence of oxygen-containing functional groups in the CFNs, which may have affected their electrochemical properties.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Later, with optimized lignin/PVA ratios and carbonization conditions, the specific capacitance was increased to approximately 240 F g −1 without the help of activation or metal oxides. 29 When alkaline activation was employed, a remarkable specific capacitance of 344 F g −1 was reported, and the hydrophilicity of the CFNs was also increased. 31 However, the use of renewable carbon-rich lignin in electrochemical devices is still in the early stages of development.…”

Section: ■ Introductionmentioning

confidence: 99%

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Oriented Carbon Fiber Networks by Design from Renewables for Electrochemical Applications

Wei¹,

Shah²,

Carne³

et al. 2021

ACS Sustainable Chem. Eng.

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With the explosion of global demands for electrified mobility systems and a surge in rural energy transport mechanisms augmented by the scarcity of key metals, carbon by design has become a transformational pathway to fill the gap as an energy material of choice. The development of functional carbon from renewables with outstanding electrostatic double-layer capacitance is still in its infancy, as there is a significant gap in understanding the relationship between the tunable structure and properties of the bioresources both before and after their controlled carbonization. Herein, we report carbon fiber networks (CFNs) with highly controllable intact structure manufactured from four functional lignins originating from different types of processing residues, demonstrating excellent electrochemical efficacies, which makes them promising self-standing electrodes in supercapacitors. This study also underpins the feasibility and importance of preparing CFNs with highly oriented structure, which endows superior specific capacitance and cycle stability compared to the CFNs with randomly oriented fibers. The randomly oriented CFNs reached a specific capacitance value of 456 F g–1 under current densities of 1 A g–1 and a cycle stability of 73.6%, while the CFNs with an orientation factor of 0.87 exhibited significant improvement of the specific capacitance by approximately 15% (529 F g–1) and the cycle stability reached 95% after 10 000 charge–discharge cycles. The high specific capacitance and excellent overall electrochemical properties of the highly oriented CFNs make them a cost-effective and greener material of choice for energy storage devices.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Oriented Carbon Fiber Networks by Design from Renewables for Electrochemical Applications

Wei¹,

Shah²,

Carne³

et al. 2021

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

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“…The PVA lignin nanofiber network showed has surface area of 1670m 2 per gram and excellent specific gravimetric capacitance of ~240 F per gram that was better than many nanostructured carbon or metal oxides [67]. The carbon based nanofibers have high specific electrical double layer capacitance at low cost [68].…”

Section: Nanofibers Application In Energy Technologymentioning

confidence: 99%

Green Synthesis of Nanofiber and Its Affecting Parameters

Pal¹,

Giri²

2021

Nanofibers - Synthesis, Properties and Applications

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Nanofibers, the widely applied in various field of science research, is one of the important area in nanotechnology research. Nanofibers can be classified into polymeric, ceramic and composite nanofibers depending upon the material used. A variety of nanofibers are applied in field of energy storage, biotechnology and healthcare industry, environmental engineering, as well as security and defense. The wide uses of nanofibers are mainly due to low density, high porosity, tight pore size and large surface area per unit mass. Synthesis of nanofibers depends upon various parameters of solution like molecular weight of polymer, concentration, electrical conductivity, surface tension and viscosity. The process parameters affecting nanofibers synthesis are distance between needle tip and collector, feeding rate of polymer material and electric field.

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“…PVA is also frequently blended with lignin to yield electrospun CNFs with good spinnability for a flexible supercapacitor electrode. Electrospun CNFs from lignin/PVA with various mass ratios have been achieved with large SSA [ 171 , 172 , 173 , 174 ]. The decomposition of PVA in high temperature treatment for pore-generation was stressed [ 174 ].…”

Section: Electrochemical (Ec) Performance Of Lignocellulose-derived Carbon-based Flexible Supercapacitorsmentioning

confidence: 99%

Lignocellulosic Biomass-Derived Carbon Electrodes for Flexible Supercapacitors: An Overview

Xiang

Lin

et al. 2021

Materials

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With the increasing demand for high-performance electronic devices in smart textiles, various types of flexible/wearable electronic device (i.e., supercapacitors, batteries, fuel cells, etc.) have emerged regularly. As one of the most promising wearable devices, flexible supercapacitors from a variety of electrode materials have been developed. In particular, carbon materials from lignocellulosic biomass precursor have the characteristics of low cost, natural abundance, high specific surface area, excellent electrochemical stability, etc. Moreover, their chemical structures usually contain a large number of heteroatomic groups, which greatly contribute to the capacitive performance of the corresponding flexible supercapacitors. This review summarizes the working mechanism, configuration of flexible electrodes, conversion of lignocellulosic biomass-derived carbon electrodes, and their corresponding electrochemical properties in flexible/wearable supercapacitors. Technology challenges and future research trends will also be provided.

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Green Carbon Nanofiber Networks for Advanced Energy Storage

Cited by 44 publications

References 67 publications

Oriented Carbon Fiber Networks by Design from Renewables for Electrochemical Applications

Oriented Carbon Fiber Networks by Design from Renewables for Electrochemical Applications

Green Synthesis of Nanofiber and Its Affecting Parameters

Lignocellulosic Biomass-Derived Carbon Electrodes for Flexible Supercapacitors: An Overview

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