Lithium‐ion battery (LIB) is a dominating power source in the market owing to its high energy density, good cycling stability and environmental benignity. However, technical challenges remain after years’ optimization and commercialization, which are detrimental to the expected performance and lifespan of LIBs. For instance, many cathode materials of LIBs suffer from rapid capacity fading and poor high‐rate performance, which are ascribed to self‐aggregation, dissolution and fast increased charge transfer resistances during cycles. In terms of the anode materials, low coulombic efficiency, electrolyte depletion and safety issues are common. In addition, the liquid electrolyte systems trigger safety concerns because flammable and volatile organic solvents are necessary. Recently, carbon dots (CDs) emerge as a sound material to address those challenges of LIBs, and also present promising applications in bioimaging, fluorescence sensing, photo/electro‐catalysis, and electroluminescence. This review will overlook the state‐of‐the‐art advances in the employment of CDs based composites to build cathode/anode materials and electrolytes in LIBs, through tailoring the internal structures and the surface states of electrode materials, and being additives in electrolyte, to improve the performances of the next‐generation LIBs. The major challenges and opportunities in front of CDs in LIBs will be outlined and discussed in detail.

中文翻译：

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碳点在下一代锂离子电池中的应用

锂离子电池（LIB）由于其高能量密度，良好的循环稳定性和环境友好性而成为市场上的主要电源。但是，经过多年的优化和商业化，技术挑战仍然存在，这不利于LIB的预期性能和使用寿命。例如，许多LIB正极材料的容量快速下降，且高倍率性能不佳，这归因于循环过程中的自聚集，溶解和快速增加的电荷转移电阻。就阳极材料而言，库仑效率低，电解质耗竭和安全性问题很普遍。另外，由于必须使用易燃和挥发性的有机溶剂，液体电解质系统也会引发安全隐患。最近，碳点（CD）可以作为应对LIB挑战的声音材料，并且在生物成像，荧光传感，光/电催化和电致发光方面也具有广阔的应用前景。这篇评论将忽略通过裁切电极材料的内部结构和表面状态以及作为电解质中的添加剂，在基于CD的复合材料的使用中在LIB中构建阴极/阳极材料和电解质的最新进展，改善下一代LIB的性能。将详细介绍和讨论LIB CD前面的主要挑战和机遇。这篇评论将忽略通过裁切电极材料的内部结构和表面状态以及作为电解质的添加剂，在基于CD的复合材料的使用中在LIB中构建阴极/阳极材料和电解质的最新进展，改善下一代LIB的性能。将详细介绍和讨论LIB CD前面的主要挑战和机遇。这篇评论将忽略通过裁切电极材料的内部结构和表面状态以及作为电解质中的添加剂，在基于CD的复合材料的使用中在LIB中构建阴极/阳极材料和电解质的最新进展，改善下一代LIB的性能。将详细介绍和讨论LIB CD前面的主要挑战和机遇。