High-Performance Olivine for Lithium Batteries: Effects of Ni/Co Doping on the Properties of LiFeαNiβCoγPO4Cathodes
作者： Gioele Pagot , Federico Bertasi , Graeme Nawn , Enrico Negro , Giorgio Carraro
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摘要: New high voltage and capacity storage systems are needed to sustain the increasing energy demand set by portable electronics automotive fields. Due their good electrochemical performance, lithium-transition metal-phosphates (LiMPO4) seem be very attractive as cathode materials for lithium secondary batteries. Here synthesis characterization of five cathodes batteries, based on lithium–iron, lithium–nickel, lithium–cobalt phosphates described. The effect differing degrees cobalt nickel doping structure, morphology, properties different is thoroughly studied. Transition metal atoms in these found vicariant within olivine crystal structure; however, lattice parameters cell volume can modulated varying nickel/cobalt ratio during synthesis. High performance battery prototypes terms (>4.0 V), specific (125 mAh g−1), (560 mWh cyclic life (>150 cycles) also demonstrated.
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