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Instruments / Technical Area	Publication Details	Published	Actions
I09-Surface and Interface Structural Analysis	Degradation mechanisms in Li 2 VO 2 F Li-rich disordered rock-salt cathodes Ida Kallquist , Andrew J. Naylor , Christian Baur , Johann Chable , Jolla Kullgren , Maximilian Fichtner , Kristina Edstrom , Daniel Brandell , Maria Hahlin Chemistry Of Materials DOI: 10.1021/acs.chemmater.9b00829 Diamond Proposal Number(s): [19602] Show Abstract ▼ Abstract: The strive for increased energy density in Li-ion batteries is particularly dependent on the cathode materials, that so far have been limiting for the overall battery performance. A new class of materials, Li-rich disordered rock-salts, has recently been brought forward as promising candidates for next-generation cathodes due to their ability to reversibly cycle more than one Li-ion per transition metal. Several variants of these Li-rich cathode materials have been developed recently and show promising initial capacities, but challenges concerning capacity fade and voltage decay during cycling need yet to be overcome. Mechanisms behind the significant capacity fade of some materials must be understood to allow for the design of new materials in which detrimental reactions can be mitigated. In this study the origin of the capacity fade in the Li-rich material Li2VO2F is investigated and it is shown to begin with a degradation of the particle surface that spreads inwards with continued cycling.	Jun 2019

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I09-Surface and Interface Structural Analysis

Degradation mechanisms in Li 2 VO 2 F Li-rich disordered rock-salt cathodes

Ida Kallquist , Andrew J. Naylor , Christian Baur , Johann Chable , Jolla Kullgren , Maximilian Fichtner , Kristina Edstrom , Daniel Brandell , Maria Hahlin

Chemistry Of Materials

DOI: 10.1021/acs.chemmater.9b00829

Diamond Proposal Number(s): [19602]

Show Abstract ▼

Jun 2019