Researchers investigated the challenges of utilizing Li-/Mn-rich layered cathodes in Li-ion batteries, especially regarding degradation due to phase transitions and oxygen loss. By modifying the electrolyte, they discovered that removing polar ethylene carbonate can stabilize the oxygen phase, leading to a beneficial layered-to-spinel transition rather than the detrimental formation of rocksalt. This improves charge transfer kinetics and maintains redox stability over many cycles. The study suggests that controlling surface reconstruction and phase transitions is crucial for advancing cathode technologies, as it balances charge transfer effectiveness and mitigates voltage degradation without compromising capacity.