Han Xu, Zhou Shuhao, Liu Huan, Leng Huitao, Li Sheng, Qiu Jingxia, Huo Fengwei
Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, P. R. China.
School of Physical and Mathematical Sciences, Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, P. R. China.
Small Methods. 2023 Mar;7(3):e2201508. doi: 10.1002/smtd.202201508. Epub 2023 Jan 29.
Developing an anode with excellent rate performance, long-cycle stability, high coulombic efficiency, and high specific capacity is one of the key research directions of sodium-ion batteries. Among all the anode materials, noncrystalline carbon (NCC) has great possibilities according to its supreme performance and low cost, but with the complexity and variability of the structure. With the in-depth study of the sodium storage behaviors of NCC in recent years, three modes of interlayer intercalation, clustering into micropores, and adsorption are reported and summarized. Although the storage mechanism has gradually become more evident, the complex behavior of the ions at different voltage regions, especially in the low-voltage (plateau) region, still remains controversial. It is essential to understand further the relationship between ions and NCC structure during energy storage processes. Based on the summary of previous works, this article has reviewed the storage mechanism of sodium ions in NCC and evaluated the structure-behavior relationship between sodium-ion storage and the carbon structure.
开发具有优异倍率性能、长循环稳定性、高库仑效率和高比容量的阳极是钠离子电池的关键研究方向之一。在所有阳极材料中，非晶碳（NCC）因其卓越的性能和低成本而具有很大的潜力，但结构具有复杂性和多变性。近年来，随着对NCC储钠行为的深入研究，报道并总结了层间嵌入、聚集成微孔和吸附三种模式。尽管存储机制已逐渐变得更加清晰，但离子在不同电压区域，特别是在低电压（平台）区域的复杂行为仍存在争议。进一步了解储能过程中离子与NCC结构之间的关系至关重要。基于以往工作的总结，本文综述了钠离子在NCC中的存储机制，并评估了钠离子存储与碳结构之间的结构-行为关系。
