In situ fabrication of lithium polymer battery basing on a novel electro-polymerization technique |
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| Institution: | 1. Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;2. Faculty of Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 169-8555, Japan;1. Materials Science and Engineering Program, University of California – Riverside, Riverside, CA 92521, USA;2. Department of Chemical and Environmental Engineering, University of California – Riverside, Riverside, CA 92521, USA;3. Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL 60439, USA;1. Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;2. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China;3. School of Science, Jiangsu University of Science and Technology, Zhenjiang 212100, China;4. Ningbo Research Institute, Zhejiang University, Ningbo 315100, China;1. College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China;2. The Green Aerotechnics Research Institute of Chongqing Jiaotong University, Chongqing, 401120, China;3. State Key Laboratory of Space Power-sources Technology, Shanghai Institute of Space Power-Sources, Shanghai, 200245, China;4. State Key Laboratory of Reliability and Intelligence Electrical Equipment, National Engineering Research Center for Technological Innovation Method and Tool, School of Mechanical Engineering, Hebei University of Technology, Tianjin, 300401, China;5. Department of Mechanical Engineering, National University of Singapore, 117575, Singapore;1. Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China;2. Zhongtian Supercapacitor Technology Co. Ltd., Nantong, 226000, China |
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| Abstract: | Electro-polymerization technology is proposed for the in situ fabrication of polymer lithium secondary battery and exciting results have been obtained. The polymerization starts from a common used electrolyte of 1 M LiTFSI in DOL/DME (2:1 by weight) with no initiator addition through a routine charge–discharge treatment under some appointed current rate. It is found that once an appropriate current is applied in the charging–discharging of Li/1 M LiTFSI in DOL + DME/LiCoO2 cell, the original liquid electrolyte polymerizes readily during the first several cycles in an irreversible mode, and thus the desired polymer electrolyte obtained. SEM observation indicates that unlike previous report, the designed electro-polymerization does not result in destructive local break and then turnoff of the circuit, just the reverse, it helps to the formation of a smooth polymer layer, which can effectively protect the lithium substrate from corrosion and dendrite growth. Detailed examination shows that the in situ electro-polymerization does not disturb the electrochemical behavior of the cell, the cycleabilty, internal resistance are all comparable to that of a normal Li/LiCoO2 liquid secondary battery. |
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