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

Bhat, Shrikant and Sasikumar, Pradeep and Molina-Luna, Leopoldo and Graczyk-Zajac, Magdalena and Kleebe, Hans-Joachim and Riedel, Ralf (2016):
Electrochemical Li Storage Properties of Carbon-Rich B–C–N Ceramics.
In: C Journal of Carbon Research, MDPI AG, Basel, Switzerland, p. 9, 2, (2), ISSN 2311-5629,
[Online-Edition: http://dx.doi.org/10.3390/c2020009],
[Article]

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.

Item Type: Article
Erschienen: 2016
Creators: Bhat, Shrikant and Sasikumar, Pradeep and Molina-Luna, Leopoldo and Graczyk-Zajac, Magdalena and Kleebe, Hans-Joachim and Riedel, Ralf
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: C Journal of Carbon Research
Volume: 2
Number: 2
Publisher: MDPI AG, Basel, Switzerland
Uncontrolled Keywords: BCN ceramics, Li-ion batteries, rate capability, cycling stability
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > 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: 11 Apr 2016 12:19
Official URL: http://dx.doi.org/10.3390/c2020009
Identification Number: doi:10.3390/c2020009
Funders: Authors acknowledge the financial support from the German Research Foundation (DFG) within SPP 1473/JP8, SPP1236 programs, and the German federal state of Hessen through its excellence program LOEWE “RESPONSE”., VSP acknowledge the financial support from the EU through the MC ITN FUNEA, CT-264873., The TEM employed for this work was partially funded by the German Research Foundation (DFG/INST163/2951).
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