期刊
JOURNAL OF POWER SOURCES
卷 243, 期 -, 页码 641-647出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.06.062
关键词
Area ratio; Electrode; Rate capability; Cycle life; Electrochemical performance; Lithium-ion batteries
资金
- Ministry of Education, Science, and Technology (MEST)
- National Research Foundation of Korea (NRF) through the Human Resource Training Project for Regional Innovation
- General Researcher Project [2010-0025738]
The effects of cathode/anode area ratio on the electrochemical performance of lithium-ion batteries are investigated using 2032-type coin full cells. As the anode area is increased from 1.13 (012 mm) to 2.54 cm(2) (o18 mm) while maintaining the cathode area as 1.13 cm(2) (o12 mm), both coulombic efficiency and discharge capacity at the first formation step become increasingly worse, probably owing to greater formation of solid electrolyte interphase (SEI). Moreover, rate capability also declined with increased anode area, whereas discharge capacity retention behavior during 1C/1C charge/discharge cycling appeared similar except for a slightly decreased capacity of coin cells with larger anode areas. The findings indicate that cathode/anode area ratio should be carefully evaluated to achieve reliable data on electrochemical performance. (C) 2013 Elsevier B.V. All rights reserved.
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