2001 Volume 8 Issue 290 Pages 37-43
Surface modification of glassy carbon powder was carried out in order to improve the electrochemical properties as anode materials for lithium ion secondary battery, in RF induction thermal plasma with the various reaction atmospheres. Glassy carbon powders treated in thermal plasmas showed characteristic surface morphology and compositional change. Nitrogen incorporation was recognized in the Ar-N2 plasma-treated powder. In addition, XRD measurement showed the thermal plasma treatment gave rise to advance in graphitaizarion. The electrochemical measurements of plasma treated samples also showed the increase of capacity (increase of inserted lithium content), change of the charge-discharge performance, and improvement of its cycle performance (lithium intercalation and de-intercalation). It was shown that the thermal plasma treatment should be feasible to the improvement of the electrochemical properties of carbonaceous materials.