Degradation Studies on LiFePO4 cathode

Roberto Scipioni, Peter Stanley Jørgensen, Johan Hjelm, Poul Norby, Claus Nygaard Rasmussen, Søren Højgaard Jensen

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

In this paper we examine a laboratory LiFePO4 (LFP) cathode and propose a simple model that predicts the electrode capacity as function of C-rate, number of cycles and calendar time. Microcracks were found in Li1-xFePO4 particles in a degraded LFP electrode and low-acceleration voltage (1 kV) FIB/SEM analysis allowed us to obtain phase contrast between FePO4 and LiFePO4. The evolution of micro-cracks is expected to increase the concentration of LFP particles which are not electronically accessible and thus cause a loss in capacity.
Original languageEnglish
JournalE C S Transactions
Volume64
Issue number22
Pages (from-to)97-106
ISSN1938-5862
DOIs
Publication statusPublished - 2015
Event226th Meeting of the Electrochemical Society (ECS) and 7th Meeting of the Mexico Section of the Electrochemical Society ECS and SMEQ Joint International Meeting : Joint international meeting - Cancun, Mexico
Duration: 5 Oct 20149 Oct 2014
Conference number: 226

Conference

Conference226th Meeting of the Electrochemical Society (ECS) and 7th Meeting of the Mexico Section of the Electrochemical Society ECS and SMEQ Joint International Meeting
Number226
CountryMexico
CityCancun
Period05/10/201409/10/2014

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