Decoding High‐voltage LiCoO2: From Degradation to Stabilization Toward Durable Li‐ion Batteries
Zezhou Lin, Yiran Ying, Huangxu Li, Yanhao Ren, Tiancheng Liu, Peiyu Hou, Haitao Huang
TL;DR
This review explores how to stabilize high-voltage LiCoO2 cathodes to improve the durability and energy density of lithium-ion batteries.
Contribution
The paper systematically evaluates degradation mechanisms and stabilization strategies for high-voltage LiCoO2 cathodes.
Findings
High-voltage operation of LiCoO2 leads to severe degradation and battery failure.
Stabilization strategies like foreign-ion doping and surface modifications improve structural integrity.
Electrolyte additives and structural design enhance electrochemical performance.
Abstract
Li‐ion batteries (LIBs) employing the commercially established LiCoO2 (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 of the failure mechanisms of LCO at voltages up to 4.6 V. A systematic evaluation of emerging stabilization strategies is provided, covering foreign‐ion (co‐)doping, surface modifications,…
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Taxonomy
TopicsAdvancements in Battery Materials · Advanced Battery Technologies Research · Advanced Battery Materials and Technologies