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C 2016, 2(2), 9; doi:10.3390/c2020009

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

1
Institut für Materialwissenschaft, Technische Universität Darmstadt, 64289 Darmstadt, Germany
2
Institut für Angewandte Geowissenschaften, Technische Universität Darmstadt, 64289 Darmstadt, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: I. Francis Cheng
Received: 15 January 2016 / Revised: 2 March 2016 / Accepted: 18 March 2016 / Published: 24 March 2016
(This article belongs to the Special Issue Batteries: Recent Advances in Carbon Materials)
View Full-Text   |   Download PDF [1506 KB, uploaded 24 March 2016]   |  

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. View Full-Text
Keywords: BCN ceramics; Li-ion batteries; rate capability; cycling stability BCN ceramics; Li-ion batteries; rate capability; cycling stability
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MDPI and ACS Style

Bhat, S.; Sasikumar, P.V.W.; Molina-Luna, L.; Graczyk-Zajac, M.J.; Kleebe, H.-J.; Riedel, R. Electrochemical Li Storage Properties of Carbon-Rich B–C–N Ceramics. C 2016, 2, 9.

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