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MoCl5 intercalation into carbon fibers
Affiliation:1. Institut Charles Gerhardt de Montpellier, UMR 5253, Université de Montpellier, CNRS, ENSCM, 34095, Montpellier Cedex 5, France;2. Instituto de Tecnología en Polímeros y Nanotecnología (ITPN), Facultad de Ingeniería, Universidad de Buenos Aires, CONICET Las Heras, 2214, CP 1127AAR Buenos Aires, Argentina;3. CERMAV-CNRS, 601 rue de la Chimie, St Martin d’Hères, 38041, Grenoble, Cedex 9, France;4. Réseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS, 3459, France;1. School of Liberal Arts, Korea University of Technology and Education, Cheonan 31253, Republic of Korea;2. Department of Applied Physics, Institute of Natural Sciences, and Integrated Education Program for Frontier Materials (BK21 Four), Kyung Hee University, Yongin 17104, Republic of Korea;1. Science and Technology on Combustion and Explosion Laboratory, Xi’an Modern Chemistry Research Institute, 168 E. Zhangba Road, Xi’an, 710065, Shanxi, PR China;2. Laboratory of Material Surface Engineering and Nanofabrication, Xi’an Modern Chemistry Research Institute, 168 E. Zhangba Road, Xi’an, 710065, Shanxi, PR China;3. State Key Laboratory of Fluorine and Nitrogen Chemicals, Xi’an Modern Chemistry Research Institute, 168 E. Zhangba Road, Xi’an, 710065, Shanxi, PR China;1. State Key Laboratory for Mechanical Behavior of Materials, Xi''an Jiaotong University, Xi''an 710049, China;2. Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, United Kingdom;3. Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, N7491 Trondheim, Norway
Abstract:The host effect on the intercalation of MoCl5 was studied using vapor-grown (VGCFs), mesophase-pitch-based (MPCFs) and PAN-based carbon fibers (PANCFs) heat-treated to different temperatures. MoCl5 successfully intercalated into VGCFs, but MPCFs and PANCFs showed no intercalation. MoCl5 intercalated into 2000°C- and 2200°C-treated VGCFs having larger interlayer spacing than 2900°C-treated MPCFs where no intercalation was observed. The use of MoO3 or MoOCl3 with MoCl5 found to affect the stage structure in VGCFs but was not able to perform intercalation in MPCFs and PANCFs. In VGCFs, the intercalation of MoCl5 depends on the heat treatment temperature. Stage-1 structure in single phase was formed from 3000°C-treated VGCF with MoCl5 and MoO3 in the molar ratio of 1:1:0.37. SEM studies of stage-1 VGCF 3000°C-treated fiber showed the peeling of thin layers from the fiber surface and cleavage along the fiber axis of the fiber. Apparent diameter of fibers increased to roughly 3 times after intercalation.
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