https://scholars.lib.ntu.edu.tw/handle/123456789/432436
標題: | High rate performance of LiMn2O4 cathodes for lithium ion batteries synthesized by low temperature oxygen plasma assisted sol-gel process | 作者: | Chen C.-L. Chiu K.-F. Chen Y.-R. Chen C.C. Lin H.C. HSIN-CHIH LIN |
公開日期: | 2013 | 出版社: | Elsevier B.V. | 卷: | 544 | 起(迄)頁: | 182-185 | 來源出版物: | Thin Solid Films | 摘要: | Nano-crystalline LiMn2O4 thin films have been synthesized by the sol-gel process at low temperature (623 K). The lowtemperature prepared films are treated by a direct current pulsed oxygen plasma, and tested as cathodes for lithium batteries. The plasma treated films are able to sustain charge-discharge cycles under significant high current density of up to 5.4 A/g corresponding to 45 C for battery operation. The capacity ratio for discharging at 1.2 A/g and 0.024 A/g is over 65%, indicating lowinternal resistance, which meets the requirement of fast charge and discharge for electric vehicles. The stable high current density performances can be attributed to the formation of a dense surface morphology that is induced by the plasma irradiation. The formation of the surface morphology results in the more uniform current distribution on the film surface, which decreases the interface charge transfer resistances as measured by the electrochemical impedance spectra. © 2013 Elsevier B.V. All rights reserved. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84886251430&doi=10.1016%2fj.tsf.2013.03.127&partnerID=40&md5=c9d05a52ade74947dac1180a7d743994 https://scholars.lib.ntu.edu.tw/handle/123456789/432436 |
ISSN: | 00406090 | DOI: | 10.1016/j.tsf.2013.03.127 | SDG/關鍵字: | Cathodes; Charge transfer; Charging (batteries); Electric batteries; Electric discharges; Electrodes; Electron emission; Interfaces (materials); Lithium; Lithium alloys; Lithium batteries; Lithium compounds; Oxygen; Secondary batteries; Sol-gel process; Surface morphology; Temperature; Thin films; Battery operation; Charge-discharge cycle; Electrochemical impedance spectra; High current densities; High-rate performance; Oxygen plasmas; Plasma irradiations; Uniform current distribution; Lithium-ion batteries |
顯示於: | 材料科學與工程學系 |
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