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Article

Effect of Transitional Metals (Mn and Ni) Substitution in LiCoPO4 Olivines

1
CNR-ISC, U.O.S. La Sapienza, Piazzale A. Moro 5, 00185 Rome, Italy
2
Computational Laboratory for Hybrid/Organic Photovoltaics (CLHYO) Istituto CNR di Scienze e Tecnologie Chimiche “Giulio Natta”(CNR-SCITEC), Via Elce di Sotto 8, 06123 Perugia, Italy
3
Department of Physics, University of Rome ‘‘La Sapienza’’, Piazzale A. Moro 5, 00185 Rome, Italy
4
Department of Sciences, University of Basilicata, V.le dell’Ateneo Lucano 10, 85100 Potenza, Italy
5
Department of Chemistry, University of Rome ‘‘La Sapienza’’, Piazzale Aldo Moro 5, 00185 Rome, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Abel Santos
Molecules 2020, 25(3), 601; https://doi.org/10.3390/molecules25030601
Received: 17 December 2019 / Revised: 17 January 2020 / Accepted: 25 January 2020 / Published: 30 January 2020
(This article belongs to the Special Issue Innovative Materials for Energy Storage)
Transition metal substitution is a key strategy to optimize the functional properties of advanced crystalline materials used as positive electrodes in secondary lithium batteries (LIBs). Here we investigate the structural alterations in the olivine lattice of Mn and Ni substituted LiCoPO4 phase and the impact on performance in LIBs. X-ray diffraction (XRD) and extended X-ray absorption experiments have been carried out in order to highlight the structural alterations induced by partial substitution of cobalt by manganese and nickel. XRD analysis suggests that substitution induces an expansion of the lattices and an increase of the antisite disorder between lithium and transition metal ions in the structure. XAS data highlight negligible electronic disorder but a relevant modulation in the local coordination around the different metal ions. Moreover, galvanostatic tests showed poor reversibility of the redox reaction compared to the pure LCP sample, and this failure is discussed in detail in view of the observed remarkable structural changes. View Full-Text
Keywords: cathode materials; olivine; X-ray diffraction; X-ray absorption cathode materials; olivine; X-ray diffraction; X-ray absorption
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MDPI and ACS Style

Palumbo, O.; Manzi, J.; Meggiolaro, D.; Vitucci, F.M.; Trequattrini, F.; Curcio, M.; Paolone, A.; Brutti, S. Effect of Transitional Metals (Mn and Ni) Substitution in LiCoPO4 Olivines. Molecules 2020, 25, 601. https://doi.org/10.3390/molecules25030601

AMA Style

Palumbo O, Manzi J, Meggiolaro D, Vitucci FM, Trequattrini F, Curcio M, Paolone A, Brutti S. Effect of Transitional Metals (Mn and Ni) Substitution in LiCoPO4 Olivines. Molecules. 2020; 25(3):601. https://doi.org/10.3390/molecules25030601

Chicago/Turabian Style

Palumbo, Oriele, Jessica Manzi, Daniele Meggiolaro, Francesco M. Vitucci, Francesco Trequattrini, Mariangela Curcio, Annalisa Paolone, and Sergio Brutti. 2020. "Effect of Transitional Metals (Mn and Ni) Substitution in LiCoPO4 Olivines" Molecules 25, no. 3: 601. https://doi.org/10.3390/molecules25030601

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