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Electrochemical Li Storage Properties of Carbon-Rich B–C–N Ceramics

Bhat, Shrikant ; Sasikumar, Pradeep ; Molina-Luna, Leopoldo ; Graczyk-Zajac, Magdalena ; Kleebe, Hans‐Joachim ; Riedel, Ralf (2022):
Electrochemical Li Storage Properties of Carbon-Rich B–C–N Ceramics. (Publisher's Version)
In: Journal of Carbon Research, 2 (2), MDPI, e-ISSN 2311-5629,
DOI: 10.26083/tuprints-00020483,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: Electrochemical Li Storage Properties of Carbon-Rich B–C–N Ceramics
Language: English
Abstract:

Amorphous BCN ceramics were synthesized via a thermal conversion procedure of piperazine–borane and pyridine–borane. The synthesized BC₂N and BC₄N ceramics contained, in their final amorphous structure, 45 and 65 wt % of carbon, respectively. Elemental analysis revealed 45 and 65 wt % of carbon for BC₂N and BC₄N, respectively. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) confirmed the amorphous nature of studied compounds. Lateral cluster size of carbon crystallites of 7.43 and 10.3 nm for BC₂N and BC₄N, respectively, was calculated from Raman spectroscopy data. This signified a higher order of the carbon phase present in BC₄N. The electrochemical investigation of the low carbon BC₂N composition as anodes for Li-ion batteries revealed initial capacities of 667 and 235 mAh·g⁻¹ for lithium insertion/extraction, respectively. The material with higher carbon content, BC₄N, disclosed better reversible lithium storage properties. Initial capacities of 1030 and 737 mAh·g⁻¹ for lithium insertion and extraction were recovered for carbon-rich BC₄N composition. Extended cycling with high currents up to 2 C/2 D revealed the cycling stability of BC4N electrodes. Cycling for more than 75 cycles at constant current rates showed a stable electrochemical behavior of BC₄N anodes with capacities as high as 500 mAh·g⁻¹.

Journal or Publication Title: Journal of Carbon Research
Volume of the journal: 2
Issue Number: 2
Publisher: MDPI
Collation: 10 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science > Advanced Electron Microscopy (aem)
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 09 Feb 2022 13:19
Last Modified: 09 Feb 2022 13:19
DOI: 10.26083/tuprints-00020483
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-204831
Additional Information:

Keywords: BCN ceramics; Li-ion batteries; rate capability; cycling stability

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20483
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