to scrutinize the root cause of capacity fade in V2O5 cathodes of Li-ion batteries.
Specifically, we performed in situ measurements of stress of V2O5 thin films during 50
electrochemical cycles. Surprisingly, electrochemical cycling appears to induce elastic and
rate-independent deformation over a voltage range relevant to battery operation (4–2.8 V).
However, the compressive stresses gradually increase with cycle number during the first few …