Sol–gel derived nanostructured Li2MnSiO4/C cathode with high storage capacity
作者： S. Devaraj , M. Kuezma , C.T. Ng , P. Balaya
DOI: 10.1016/J.ELECTACTA.2013.04.009
关键词:
摘要: a b s t r c Carbon-coated, nanostructured Li2MnSiO4 (LMS/C) was synthesized by sol-gel method using chelating carbonizing source, Glucono-1,5-lactone (GAL). Powder X-ray diffraction studies confirmed nominally pure phase formation. SEM and TEM revealed that LMS/C is comprised of particles less than 50 nm in diameter with thin film 1-5 amorphous carbon coating. Elemental mapping demon- strated homogenous distribution throughout LMS/C. Besides coating, GAL promotes purity reduces particle agglomeration during annealing. Raman spectroscopic study the formed nanocomposite mostly amorphous. The electrochemical performance evaluated galvanostatic charge/discharge cycles at various C-rates. We report here well-defined, flat plateau for extraction/insertion 1.5 Li + -ion per formula
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