Rechargeable Lithium-Ion Battery Based on a Cathode of Copper Hexacyanoferrate
Víctor Rojas, Gustavo Cáceres, Silvana López, Rodrigo Henríquez, Paula Grez, Ricardo Schrebler, Emilio Navarrete, Francisco Herrera, Álvaro Caballero, Juan Luis Gómez‐Cámer, Eduardo Muñoz
Abstract
In this work, the performance of copper(II) hexacyanoferrate(III) (CuHCF) as a cathode material for lithium-ion batteries was studied. The compound was synthesized by a precipitation reaction in aqueous solution in a closed system. The morphology and structure show nanoparticles with sizes between 40 and 70 nm with a high agglomeration and a crystalline phase with a cubic structure, respectively. The material exhibited a stable performance with a working potential of around 3.6 V vs Li + /Li and a decrease in the charge transfer resistance due to increased ionic conductivity. The gravimetric capacity obtained is near 60 mAh g −1 during 300 cycles at a rate of C/20, close to the practical capacity. Considering its electrochemical performance, CuHCF could be a promising cathode material for lithium-ion batteries.