Organic Xerogel and PVDF derived Carbon Nano structures as Anode materials for Lithium Ion Batteries

M G, Karthik (2015) Organic Xerogel and PVDF derived Carbon Nano structures as Anode materials for Lithium Ion Batteries. Masters thesis, Indian Institute of Technology Hyderabad.

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Abstract

The main aim of this present study is to understand how changes in hard carbon micro structure affect the electrochemical performance when used as anode for Lithium-Ion Batteries. We have explored two hard carbon precursors: resorcinol formaldehyde based xerogel and polyvinylidene fluoride (PVDF) polymer. Depending upon the precursors and synthesis conditions hard carbons differ in their micro-structure in terms of crystallinity, porosity, morphology and also in the hetero-atoms content and functional groups. To enhance the electrochemical performance we used different synthesis parameters like optimizing ball milling duration in case of resorcinol formaldehyde based carbon xerogel and pyrolysis temperature in case of PVDF. In order to understand the various structural changes we performed different characterization like Brunauer- Emmett-Teller, Transmission Electron Microscopy, Scanning Electron Microscopy, X-ray diffraction, RAMAN spectroscopy and Fourier Transform Infrared Spectroscopy. Further, we performed Galvan static charge/discharge experiments, Impedance spectroscopy and cyclic voltammetry to gauge the electrochemical performance.

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