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Reuse of Ni-Co-Mn oxides from spent Li-ion batteries to prepare bifunctional air electrodes

Lookup NU author(s): Emeritus Professor Keith Scott, Dr Xu Wu

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).

Abstract

© 2017 Elsevier B.V. Spent lithium ion batteries are potential environmental hazards and if not re-cycled waste natural resources. One of the difficulties for recovery is the recycling cost high and restricting the economic drivers. In this research, a process is developed to directly reuse nickel-manganese-cobalt oxides from spent lithium ion batteries to prepare air electrodes based on a simple thermal treatment method. 100% value metals (cobalt, nickel and manganese) were regenerated from the cathode. By heated at 600 °C, the Ni-Co-Mn oxides experienced a significant phase change from an α-NaFeO2-type structure to spinel structure. Electrochemical tests revealed that the regenerated nickel-manganese-cobalt oxides exhibited remarkable bifunctional catalytic activities towards the oxygen evolution and oxygen reduction reactions in aqueous KOH electrolyte. The nickel-manganese-cobalt oxide powders were applied in an air battery, the energy efficiency was 75% at a current density of 10 mA cm−2, which was better than commercal zinc-air batteries.

Publication metadata

Author(s): Wei J, Zhao S, Ji L, Zhou T, Miao Y, Scott K, Li D, Yang J, Wu X

Publication type: Article

Publication status: Published

Journal: Resources, Conservation and Recycling

Year: 2018

Volume: 129

Pages: 135-142

Print publication date: 01/02/2018

Online publication date: 06/11/2017

Acceptance date: 16/10/2017

Date deposited: 18/01/2018

ISSN (print): 0921-3449

ISSN (electronic): 1879-0658

Publisher: Elsevier BV

URL: https://doi.org/10.1016/j.resconrec.2017.10.021

DOI: 10.1016/j.resconrec.2017.10.021

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