Hydrometallurgical method for recycling rare earth metals, cobalt, nickel, iron, and manganese from negative electrodes of spent Ni-MH mobile phone batteries

Quimica nova

Celante, Vinicius Guilherme¹  Santos, Vinicius Emmanuel de Oliveira dos²  Freitas, Marcos Benedito José Geraldo de²  Lelis, Maria de Fátima Fontes² 

[1] Instituto Federal do Espírito Santo, Aracruz, Brasil;Universidade Federal do Espírito Santo, Vitória, Brasil

关键词: rare earth metals;    batteries;    recycling.;   

DOI  :  10.1590/S0100-40422014000100005

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

A hydrometallurgicalmethod for the recovery of rare earth metals, cobalt, nickel, iron, and manganesefrom the negative electrodes of spent Ni - MH mobile phone batteries was developed.The rare earth compounds were obtained by chemical precipitation at pH 1.5,with sodium cerium sulfate (NaCe(SO4)2.H2O)and lanthanum sulfate (La2(SO4)3.H2O)as the major recovered components. Iron was recovered as Fe(OH)3and FeO. Manganese was obtained as Mn3O4.The recoveredNi(OH)2 and Co(OH)2 were subsequently used to synthesizeLiCoO2, LiNiO2 and CoO, for use as cathodes in ion-Libatteries. The anodes and recycled materials were characterized by analyticaltechniques.

【 授权许可】

CC BY