In situ phase behaviour of a high capacity LiCoPO4 electrode during constant or pulsed charge of a lithium cell

Michael G Palmer; James T Frith; Andrew L Hector; Andrew W Lodge; John R Owen; Chris Nicklin; Jonathan Rawle

doi:10.1039/c6cc07756k

In situ phase behaviour of a high capacity LiCoPO₄ electrode during constant or pulsed charge of a lithium cell

Chem Commun (Camb). 2016 Dec 1;52(98):14169-14172. doi: 10.1039/c6cc07756k.

Authors

Michael G Palmer¹, James T Frith¹, Andrew L Hector¹, Andrew W Lodge¹, John R Owen¹, Chris Nicklin², Jonathan Rawle²

Affiliations

¹ Chemistry, University of Southampton, Southampton SO17 1BJ, UK. [email protected].
² Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK.

PMID: 27869269
DOI: 10.1039/c6cc07756k

Abstract

The phase changes that occur during lithium extraction from LiCoPO₄ in lithium half-cells were studied using synchrotron X-ray diffraction. The existence of two two-phase regions with an intermediate phase present was observed. Significant variations in the composition of the phases of nominal stoichiometry LiCoPO₄, Li_2/3CoPO₄ and CoPO₄ resulted in unit cell volume variations. On current pulsing, lattice parameter shifts and phase recovery were directly observed.