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Synthesis and characterization of carbon-coated Li0.5Ni0.25TiOPO4 anode material
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry. (strukturkemi)
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry. (strukturkemi)
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2009 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 54, no 23, 5531-5536 p.Article, review/survey (Refereed) Published
Abstract [en]

Li0.5Ni0.25TiOPO4/C composite was synthesized by the co-precipitation method using polyethylene glycol as carbon source. X-ray diffraction study showed that the as-prepared material crystallizes in the monoclinic system (S.G. P21/c). This 3D structure exhibits an open framework favourable to intercalation reactions. The morphology and the microstructure characterisation was performed by scanning electron microscopy (SEM). Small particles (1 μm) coated by carbon were observed. Raman study confirms the presence of carbon graphite in the Li0.5Ni0.25TiOPO4/C composite. Cyclic voltammetry (CV) and charge–discharge galvanostatic cycling were used to characterize its electrochemical properties. The Li0.5Ni0.25TiOPO4/C composite exhibits excellent electrochemical performances with good capacity retention for 50 cycles. Approximately 200 mAh/g could be reached at C, C/2, C/5 and C/20 rates in the 0.5–3 V potential range. These results clearly evidenced the positive effect of the carbon coating on the electrochemical properties of the studied phosphate.

Place, publisher, year, edition, pages
Elsevier Ltd , 2009. Vol. 54, no 23, 5531-5536 p.
Keyword [en]
Lithium nickel oxyphosphate, Lithium ion batteries, Carbon coating, Raman spectroscopy
National Category
Inorganic Chemistry
Research subject
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-108447DOI: 10.1016/j.electacta.2009.04.053ISI: 000268518500030OAI: oai:DiVA.org:uu-108447DiVA: diva2:235883
Note
Department of Materials Chemistry, Uppsala University, Box 538, SE-75121 Uppsala, SwedenAvailable from: 2009-09-18 Created: 2009-09-18 Last updated: 2017-12-13Bibliographically approved

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