Enabling high‐performance 4.6 V <scp>LiCoO₂</scp> in a wide temperature range via a synergetic strategy

Nowadays, LiCoO2 has dominated the cathode technology of lithium-ion batteries (LIBs) for 3C digital devices, but sluggish electrochemical kinetics and severe structure destruction limit its further application under extreme temperatures. Herein, we design a synergetic strategy including La, Mg co-doping LiAlO2@Al2O3 surface coating. Typically, La3+ increases interlayer distance significantly enhances ionic conductivity, Mg2+ improves electronic coating layer interfacial charge transfer suppresses polarization. The co-modified (CM-LCO) shows excellent temperature adaptability with remarkable performance in wide range (−40–70°C). Remarkably, CM-LCO also exhibits cycle stability high-rate at synergistic effects this co-modification are demonstrated by investigating reaction evolution CM-LCO. This work proposes promising high-voltage LCO range.