Hudaya, Chairul Halim, Martin Proell, Johannes Besser, Heino Choi, Wonchang Pfleging, Wilhelm Seifert, Hans Juergen Lee, Joong Kee 2024-01-20T05:31:28Z 2024-01-20T05:31:28Z 2021-09-03 2015-12-01 0378-7753 https://pubs.kist.re.kr/handle/201004/124645 The interfacial instabilities, including side reactions due to electrolyte decompositions and Cobalt (Co) dissolutions, are the main detrimental processes at LiCoO2 cathode when a high-voltage window (>4.2 V) is applied. Nevertheless, cycling the cathode with a voltage above 4.2 V would deliver an increased gravimetric capacity, which is desired for high power battery operation. To address these drawbacks, we demonstrate a synergistic approach by manufacturing the three-dimensional high-temperature LiCoO2 electrodes (3D HT-LCO) using laser-microstructuring, laser-annealing and subsequent coating with polymerized C-60 thin films (C-60@3D HT-LCO) by plasma-assisted thermal evaporation. The C-60@3D HT-LCO cathode delivers higher initial discharge capacity compared to its theoretical value, i.e. 175 mA h g(-1) at 0.1 C with cut-off voltage of 3.0-4.5 V. This cathode combines the advantages of the 3D electrode architecture and an advanced Co coating/passivation concept leading to an improved electrochemical performance, due to an increased active surface area, a decreased charge transfer resistance, a prevented Co dissolution into the electrolyte and a suppressed side reaction and electrolyte decomposition. This work provides a novel solution for other cathode materials having similar concerns in high potential regimes for application in lithium-ion microbatteries. (C) 2015 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV LITHIUM ION BATTERIES ELECTROCHEMICAL PERFORMANCE SURFACE MODIFICATION CYCLING STABILITY CATHODE MATERIAL ANODE MATERIALS COATED LICOO2 THIN-FILM ELECTRODES MECHANISM A polymerized C-60 coating enhancing interfacial stability at three-dimensional LiCoO2 in high-potential regime Article 10.1016/j.jpowsour.2015.08.044 1 JOURNAL OF POWER SOURCES, v.298, pp.1 - 7 JOURNAL OF POWER SOURCES 298 1 7 scie scopus 000362146800001 2-s2.0-84939810450 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article LITHIUM ION BATTERIES ELECTROCHEMICAL PERFORMANCE SURFACE MODIFICATION CYCLING STABILITY CATHODE MATERIAL ANODE MATERIALS COATED LICOO2 THIN-FILM ELECTRODES MECHANISM Interfacial kinetics Polymerized C-60 coating films Laser structuring/annealing Three-dimensional LiCoO2 Co dissolutions High-voltage window