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In situ phase behaviour of a high capacity LiCoPO 4 electrode during constant or pulsed charge of a lithium cell

DOI: 10.1039/C6CC07756K DOI Help

Authors: Michael G. Palmer (University of Southampton) , James T. Frith (University of Southampton) , Andrew L. Hector (University of Southampton) , Andrew W. Lodge (University of Southampton) , John R. Owen (University of Southampton) , Chris Nicklin (Diamond Light Source) , Jonathan Rawle (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chem. Commun.

State: Published (Approved)
Published: November 2016
Diamond Proposal Number(s): 11142

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, Li2/3CoPO4 and CoPO4 resulted in unit cell volume variations. On current pulsing, lattice parameter shifts and phase recovery were directly observed.

Subject Areas: Materials, Chemistry

Instruments: I07-Surface & interface diffraction