Improvement in the electrochemical performance of LixV2O5 induced by Tb doping |
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| Affiliation: | 1. Departamento de Qu??mica, FFCLRP-USP, 14040-901 Ribeirão Preto SP, Brazil;2. Departamento de F??sica, UFPR, Caixa Postal 19091, 81531-990 Curitiba PR, Brazil;1. Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, 00184 Roma, Italy;2. CNR-IFN, Istituto di Fotonica e Nanotecnologie, CSMFO Lab. & FBK-CMM, 38123 Povo, Trento, Italy;3. Laboratoire des Technologies Innovantes, LTI, Département de Génie industriel ENSA – Tanger. Université Abdelmalek Essaâdi, Tanger, Morocco;4. Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari Venezia, 30172 Mestre, Venezia, Italy;5. CNR-IFAC, Istituto di Fisica Applicata Nello Carrara, 50019 Sesto Fiorentino, Firenze, Italy;6. Division of Materials Science, Department of Engineering Sciences and Mathematics, Luleå University of Technology, 971 87 Luleå, Sweden;1. School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, PR China;2. Baoji Titanium Industry Co., Ltd., Baoji, Shanxi 721014, PR China;3. Baoti Group Ltd., Baoji, Shanxi 721014, PR China;1. Dipartimento di Agraria and Unità di Ricerca Istituto Nazionale di Biostrutture e Biosistemi, Università degli Studi di Sassari, Viale Italia 39, I-07100 Sassari, Italy;2. Dipartimento di Medicina Clinica e Sperimentale, Università degli Studi di Sassari, Viale S. Pietro 43/b, I-07100 Sassari, Italy;3. Istituto CNR di Chimica Biomolecolare, UOS Sassari, Traversa La Crucca 3, I-07100 Sassari, Italy;4. Istituto CNR di Scienze delle Produzioni Alimentari, UOS Sassari, Traversa La Crucca 3, I-07100 Sassari, Italy;5. Department of Biological & Environmental Sciences, College of Arts and Sciences, Qatar University, P.O. Box: 2713, Doha, Qatar;6. UCD School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland;1. Rayat ShikshanSanstha’s , Yashavantrao Chavan Institute of Science, Satara 411015, India;2. GogateJogalekar College, Ratnagiri. (M.S) 415612, India;3. Department of Physics, Shivaji University Kolhapur, (M.S.), India |
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| Abstract: | We have studied the electrochemical behavior of Tb0.11V2O5 electrodes in propylene carbonate and LiClO4. The techniques used in the study were cyclic voltammetry, discharge/charge polarization, FTIR and XRD. The Tb0.11V2O5 compound was prepared using the xerogel route and the composite electrodes were membranes prepared with PVDF-binder and carbon. The results show that the Tb doping improves the electrochemical performance of V2O5 due to the bonding of the earth-rare ions and the residual H2O in the V2O5 structure. The capacity fading was reduced, the specific reversible capacity was 330 mA g?1 (C/4, cut-off 3.7–2.0 V) and the voltage presented a large plateau at 2.5 V for the Tb0.11V2O5 electrodes. The charge transfer between Li and Tb0.11V2O5 does not involve the oxidation–reduction of the Tb3+ ions. |
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