作者: C Vidal-Abarca , P Lavela , MJ Aragon , N Plylahan , JL Tirado
DOI: 10.1039/C2JM34227H
关键词: Mössbauer spectroscopy 、 Analytical chemistry 、 Phosphate 、 Electrochemistry 、 Interphase 、 Materials science 、 Phase (matter) 、 Crystallography 、 Electrode 、 Orthorhombic crystal system 、 Lithium
摘要: The Li1+xTi2−xFex(PO4)3/C series with 0 ≤ x 0.4 was prepared by a sol–gel method. XRD patterns showed rhombohedral phase and minor contribution of an orthorhombic phase. local environment the phosphate structure analyzed 31P MAS NMR spectroscopy. electrochemical lithium insertion revealed two reversible regions for Fe3+/Fe2+ Ti4+/Ti3+ reactions as confirmed 57Fe Mossbauer Capacity values large 130 mA h g−1 were recorded Li1.2Ti1.8Fe0.2(PO4)3/C after 40 cycles. drastic decrease in capacity observed LiTi2(PO4)3/C cycled at C/2 explained terms lower kinetic response electrode–electrolyte interphase.