Lee, JK An, KW Ju, JB Cho, BW Cho, WI Park, D Yun, KS 2024-01-21T12:08:41Z 2024-01-21T12:08:41Z 2021-09-05 2001-07 0008-6223 https://pubs.kist.re.kr/handle/201004/140356 Polyacrylonitrile(PAN)-based carbon fibers were tested as anodes for Lithium ion rechargeable batteries. PAN-based fibers were first stabilized under tension in air at about 200 degreesC (stabilization tension) and then carbonized in different gas environments (carbonization atmospheres) at heat treatment temperatures (HTT) between 700 and 1500 degreesC. The carbon fiber electrodes were prepared at various conditions using the stabilized PAN fibers and then their electrochemical characteristics were investigated. The PAN-based carbon fiber prepared at an oxidative stabilization tension of ca. 10 MPa showed the highest discharge capacity in our experimental range. We found that the effective diffusion coefficient of lithium in the carbon fiber electrode was influenced by the carbonization environment employed. The electrochemical intercalation process depended on mass transfer of lithium into carbon layer which is rate-determining during the electrode charge-discharge process. The effect of HTT on discharge capacity varied depending on the combined effect of both the amount of intercalation sites available and the electric conductivity of the carbon fiber used. (C) 2001 Elsevier Science Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD DISORDERED CARBONS NEGATIVE ELECTRODE IRREVERSIBLE CAPACITIES LI-INSERTION GRAPHITE HARD PERFORMANCE INTERCALATION PYROLYSIS MECHANISM Electrochemical properties of PAN-based carbon fibers as anodes for rechargeable lithium ion batteries Article 10.1016/S0008-6223(00)00237-2 1 CARBON, v.39, no.9, pp.1299 - 1305 CARBON 39 9 1299 1305 scie scopus 000169368200002 2-s2.0-0034971064 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article DISORDERED CARBONS NEGATIVE ELECTRODE IRREVERSIBLE CAPACITIES LI-INSERTION GRAPHITE HARD PERFORMANCE INTERCALATION PYROLYSIS MECHANISM carbon fiber, electrodes stabilization, carbonization electrochemical properties