Decoding High‐voltage LiCoO 2 : From Degradation to Stabilization Toward Durable Li‐ion Batteries

ABSTRACT Li‐ion batteries (LIBs) employing the commercially established LiCoO 2 (LCO) cathode continue to dominate the market for portable electronic devices. Enhancing their volumetric energy density is crucial for extending the operational duration of advanced smart devices. One direct approach to increasing both specific capacity and energy density involves elevating the cut‐off charging voltage to above 4.6 V (vs Li/Li + ). However, high‐voltage operation induces severe material degradation and battery failure, impeding further development of high‐voltage LCO technologies. This review first emphasizes the growing necessity for high‐voltage cathodes in contemporary LIBs, followed by a detailed exploration…

• NN
  National Natural Science Foundation of China

  Award: 22379052
• HK
  Hong Kong Polytechnic University

  Awards: 1‐CDLS, 1‐CD91
• IA
  Innovation and Technology Commission - Hong Kong

  Award: MHP/080/22
• TS
  Taishan Scholar Foundation of Shandong Province

  Award: tsqn202507210