Features of electrical properties of BE-C(Fe) biocarbons carbonized in the presence of an Fe-containing catalyst

Popov, V. V.; Orlova, T. S.; Gutiérrez‐Pardo, A.; Ramírez‐Rico, J.

doi:10.1134/s1063783417040205

Cited by 2 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Currently, the attention is focused on the application of catalytically graphitized carbons in different advanced fields such as electrodes for supercapacitors, 4−6 anode materials for lithium-ion batteries, 7 and others 8,9 owing to their outstanding properties, including enhanced crystallinity 10 and electronic conductivity. 11 Among the different catalysts employed, IV−VIII transition metals and especially Fe, Co, and Ni have stood out for their good graphitization efficiency. In this regard, of particular interest are previous studies from Maldonado-Hodar et al, 12 Yan et al, 13 Thambiliyagodage et al, 14 and Sevilla et al 15−17 evaluating the graphitization effectiveness of different transition metals with the same concentration on a certain carbon precursor.…”

Section: Introductionmentioning

confidence: 99%

“…However, despite the large body of work devoted to employing this method for the synthesis of carbon materials, the mechanisms of catalytic graphitization are still unclear and limited progress has been made in this direction. Currently, the attention is focused on the application of catalytically graphitized carbons in different advanced fields such as electrodes for supercapacitors, − anode materials for lithium-ion batteries, and others , owing to their outstanding properties, including enhanced crystallinity and electronic conductivity …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural Evolution in Iron-Catalyzed Graphitization of Hard Carbons

2021

View full text Add to dashboard Cite

Despite the recent interest in catalytic graphitization to obtain graphite-like materials from hard-carbon sources, many aspects of its mechanism are still poorly unknown. We performed a series of in situ experiments to study phase transformations during graphitization of a hard-carbon precursor using an iron catalyst at temperatures up to 1100 °C and ex situ total scattering experiments up to 2000 °C to study the structural evolution of the resulting graphitized carbon. Our results show that upon heating and cooling, iron undergoes a series of reductions to form hematite, magnetite, and wustite before forming a carbide that later decomposes into metallic iron and additional graphite and that the graphitization fraction increases with increasing peak temperature. Structural development with temperature results in decreasing sheet curvature and increased stacking, along with a decrease in turbostratic disorder up to 1600 °C. Higher graphitization temperatures result in larger graphitic domains without further ordering of the graphene sheets. Our results have implications for the synthesis of novel biomass-derived carbon materials with enhanced crystallinity.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural Evolution in Iron-Catalyzed Graphitization of Hard Carbons

2021

View full text Add to dashboard Cite

show abstract

“…The graphitization of disordered carbon precursors can be induced in situ during pyrolysis at moderate temperatures (below 1000 ºC) via the prior incorporation of a transition metal into the raw material [22,23]. The resulting graphitic materials show similar morphology to the starting precursor, but with progressive enhancements in crystallinity [24] and electronic conductivities [25] with increasing heat-treatment temperature. In contrast, the Young's modulus increases up to 1150 ºC, and abruptly decreases between 1150 and 1300 °C [26].…”

Section: Introductionmentioning

confidence: 99%