Realizing High Voltage Lithium Cobalt Oxide in Lithium-Ion Batteries,Industrial & Engineering Chemistry Research

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Realizing High Voltage Lithium Cobalt Oxide in Lithium-Ion Batteries
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-06-05 , DOI: 10.1021/acs.iecr.9b01236
Xiao Wang ₁ , Xinyang Wang ₁ , Yingying Lu ₁

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The combination of high voltage cathode and metal or graphite anodes provides a feasible way for future high-energy batteries. Among various battery cathodes, lithium cobalt oxide is outstanding for its excellent cycling performance, high specific capacity, and high working voltage and has achieved great success in the field of consumer electronics in the past decades. Recently, demands for smarter, lighter, and longer standby-time electronic devices have pushed lithium cobalt oxide-based batteries to their limits. To obtain high voltage batteries, various methods have been adopted to lift the cutoff voltage of the batteries above 4.45 V (vs Li/Li⁺). This review summarizes the mechanism of capacity decay of lithium cobalt oxide during cycling. Various modifications to achieve high voltage lithium cobalt oxide, including coating and doping, are also presented. We also extend the discussion of popular modification methods for electrolytes including electrolyte additives, quasi-solid electrolytes, and electrode/electrolyte interfaces.

中文翻译：

在锂离子电池中实现高压钴酸锂

高压阴极与金属或石墨阳极的组合为将来的高能电池提供了一种可行的方法。在各种电池阴极中，钴酸锂以其出色的循环性能，高比容量和高工作电压而著称，并且在过去的几十年中在消费电子领域取得了巨大的成功。近来，对更智能，更轻和更长的待机时间电子设备的需求将基于锂钴氧化物的电池推向了极限。为了获得高压电池，已采用各种方法将电池的截止电压提升到4.45 V以上（vs Li / Li ⁺）。这篇综述总结了锂钴氧化物在循环过程中容量衰减的机理。还提出了用于实现高压钴酸锂的各种修改，包括涂覆和掺杂。我们还将扩展对电解质的流行改性方法的讨论，包括电解质添加剂，准固体电解质和电极/电解质界面。

更新日期：2019-06-07

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