Synthesis, characterization and electrochemical evaluation of mixed oxides of nickel and cobalt from spent lithium-ion cells. Issue 115 (7th December 2016)

• Record Type: Journal Article
• Authors: Sandhya, C. P.; John, Bibin; Gouri, C.
• Is Part Of: RSC advances. Volume 6:Issue 115(2016)
• Page Start: 114192
• Page End: 114197
• Publication Date: 2016-12-07
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra22439c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A simple and easy strategy for the synthesis of mixed oxides of Ni and Co from spent Li-ion cell cathodes based on LiNi0.8 Co0.15 Al0.05 O2 (LNCAO) active material is presented here. Abstract : A simple and easy strategy for the synthesis of mixed oxides of Ni and Co from spent Li-ion cell cathodes based on LiNi0.8 Co0.15 Al0.05 O2 (LNCAO) active material is presented here. The separation of the precursor of the active materials in the hydroxide form is achieved using a chemical precipitation technique and it is then subjected to heat treatment following two routes: (i) conventional heating, and (ii) microwave heating. The products thus obtained are evaluated as anode material in Li-ion cells using Li metal as the counter electrode. The mixed oxides of Ni and Co synthesised via the microwave route (MO-MW) perform better compared to those obtained following the conventional heating route (MO-CH). The MO-MW electrode shows an initial specific capacity of 1104 mA h g −1 and retains 846 mA h g −1 after 30 charge–discharge cycles, whereas, the MO-CH electrode delivers an initial specific capacity of 763 mA h g −1 with retention of 71% after 30 cycles. The metal oxide composite structure, its nano-dimensions as well as the spherical morphology of the MO-MW material contributed towards its better electrochemical performance.