Improved Elevated Temperature Performance of LiFePO4/Graphite Cell by Blending NMC640 in Cathode

Author:

Yue Meng,Aiken ConnorORCID,Deshmukh JayORCID,Garayt Matthew D. L.ORCID,Johnson MichelORCID,Dahn J. R.ORCID,Yang ChongyinORCID

Abstract

Physical mixtures of LiMn2O4 (LMO) and NMC active cathode materials is a well-known strategy in commercial batteries to achieve better cycling and storage performance than cells with a pure LMO cathode. In this work, we demonstrated a similar synergic effect in LiFePO4(LFP)/NMC640 cathode material blends. Blending LFP with NMC640 in the weight ratio of 90% to 10% lead to improvements in cycling and storage compared to cells with LFP alone. A clear linear coordination between capacity loss and iron deposition on the graphite anode was observed in these blended cells. This work shows that blending NMC in LFP cathode is a promising strategy to improve the high-temperature stability of LFP/graphite cells for long-term operation.

Funder

Natural Sciences and Engineering Research Council of Canada

Publisher

The Electrochemical Society

Subject

Materials Chemistry,Electrochemistry,Surfaces, Coatings and Films,Condensed Matter Physics,Renewable Energy, Sustainability and the Environment,Electronic, Optical and Magnetic Materials

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