Abstract
In this work we investigate the electrochemical behavior of bio-derived carbon-aerogel/Li4Ti5O12 composites (CAG/LTO) in Li-ion half cells. The studied CAG/LTO samples were successfully prepared through the gelatinization process of potato starch precursor with pristine LTO material, followed by controlled pyrolysis in an inert gas atmosphere. The obtained composites were examined by elemental analysis (EA), X-ray diffraction (XRD), N2-adsorption/desorption (N2-sorption), scanning and transmission electron microscopy (SEM, TEM), galvanostatic charge/discharge tests (GCDT), extensive cycling (LT-GCDT) and cyclic voltammetry (CV) methods. The results show, that carbon aerogel compressive matrix significantly improved the electrical conductivity of LTO anode material and was effective only in its composite form. The best electrochemical parameters and overall performance was achieved by 16% CAG/LTO composite. After extensive cycling (1016 charge/discharge cycles under 5 C), its discharge capacity was equal to 209 mAh/g, achieving the capacity retention of 106%.
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