Abstract：
Sodium-ion batteries (SIBs), recognized for balanced energy density and cost-effectiveness, are positioned as a promising complement to lithium-ion batteries (LIBs) and a substitute for lead-acid batteries, particularly in low-speed electric vehicles and large-scale energy storage. Despite their extensive potential, concerns about range anxiety due to lower energy density underscore the importance of fast-charging technologies, which drives the exploration of high-rate electrode materials. Polyanionic cathode materials are emerging as promising candidates in this regard. However, their intrinsic limitation in electronic conductivity poses challenges for synchronized electron and ion transport, hindering their suitability for fast-charging applications. This review provides a comprehensive analysis of sodium ion migration during charging/discharging, highlighting it as a critical rate-limiting step for fast charging. By delving into intrinsic dynamics, key factors that constrain fast-charging characteristics are identified and summarized. Innovative modification routes are then introduced, with a focus on shortening migration paths and increasing diffusion coefficients, providing detailed insights into feasible strategies. Moreover, the discussion extends beyond half cells to full cells, addressing challenges and opportunities in transitioning polyanionic materials from the laboratory to practical applications. This review aims to offer valuable insights into the development of high-rate polyanionic cathodes, acknowledging their pivotal role in advancing fast-charging SIBs.
摘要：
钠离子电池（SIB），以平衡的能量密度和成本效益而闻名，被定位为锂离子电池（LIB）的有希望的补充和铅酸蓄电池的替代品，特别是在低速电动汽车和大规模储能领域。尽管潜力巨大,由于能量密度较低而导致的距离焦虑的担忧强调了快速充电技术的重要性，这推动了高倍率电极材料的探索。在这方面,聚阴离子阴极材料正在作为有希望的候选物出现。然而,它们在电子传导性方面的内在限制对同步电子和离子传输提出了挑战，阻碍了它们对快速充电应用的适用性。这篇综述提供了在充电/放电过程中钠离子迁移的全面分析，强调它是快速充电的关键限速步骤。通过深入研究内在动力学，我们确定并总结了制约快速充电特性的关键因素。然后引入创新的改性路线,以缩短迁移路径和增加扩散系数为重点，提供对可行策略的详细见解。此外，讨论从半细胞扩展到全细胞，解决将聚阴离子材料从实验室过渡到实际应用的挑战和机遇。这篇综述旨在为高速率聚阴离子阴极的发展提供有价值的见解，承认他们在推进快速充电SIB方面的关键作用。本文受版权保护。保留所有权利。
