Electrochemical Li Storage Properties of Carbon-Rich B–C–N Ceramics
AbstractAmorphous 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
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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.
Bhat S, Sasikumar PVW, Molina-Luna L, Graczyk-Zajac MJ, Kleebe H-J, Riedel R. Electrochemical Li Storage Properties of Carbon-Rich B–C–N Ceramics. C. 2016; 2(2):9.Chicago/Turabian Style
Bhat, Shrikant; Sasikumar, Pradeep V.W.; Molina-Luna, Leopoldo; Graczyk-Zajac, Magdalena J.; Kleebe, Hans-Joachim; Riedel, Ralf. 2016. "Electrochemical Li Storage Properties of Carbon-Rich B–C–N Ceramics." C 2, no. 2: 9.