Continuous high charge levels damage LFP cells, US researchers say

From the article - which contains additional info and details:

According to a new study co-authored by Tesla battery researcher Jeff Dahn, repeated charging cycles at a higher state of charge can damage LFP cells over time. However, the researchers also recommend that high charge levels in electric cars should not be avoided as a matter of principle. What do the new findings mean in everyday life?

The study was published in the Journal of The Electrochemical Society. In it, the authors not only state that operating at high charge levels is harmful to LFP cells in the long term but also explain in detail exactly how capacity loss occurs in the cell.

“At higher SoC, there’s higher voltage, negative reactions recurring within the electrolyte get accelerated, consuming the lithium inventory,” the authors said. “Cycling near the top of charge (75%–100% SOC) is detrimental to LFP/graphite cells. Our results show a correlation between the average SOC of battery operation and capacity fade rate, meaning that the lower the average SOC, the longer the lifetime […] Therefore, the time spent cycling at high states of charge is critical to minimise.”

Note: this was originally posted in /r/EuroEV