College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
College of Materials Science and Engineering, Hunan University, Changsha 410082, China.
J Colloid Interface Sci. 2023 Oct 15;648:527-534. doi: 10.1016/j.jcis.2023.05.096. Epub 2023 May 26.
Sodium ion batteries (SIBs) attract most of the attention as alterative secondary battery systems for future large-scale energy storage and power batteries due to abundance resource and low cost. However, the lack of anode materials with high-rate performance and high cycling-stability has limited the commercial application of SIBs. In this paper, CuS@N, S co-doped carbon (CuS@NSC) honeycomb-like composite structure was designed and prepared by a one-step high-temperature chemical blowing process. As an anode material for SIBs, CuS@NSC electrode exhibited an ultra-high initial Coulomb efficiency (94.9%) and an excellent electrochemical property including a high reversible capacity of 441.3 mAh g after 100 cycles at 0.2 A g, an excellent rate performance of 380.4 mAh g even at 5 A g, and a superior long-cycle stability with a capacity retention rate of approximately 100% after 700 cycles at 1A g.
钠离子电池（SIBs）作为未来大规模储能和动力电池的替代二次电池系统引起了广泛关注，因为其具有丰富的资源和低成本。然而，缺乏具有高倍率性能和高循环稳定性的阳极材料限制了 SIBs 的商业应用。本文设计并制备了一种通过一步高温化学吹气法制备的 CuS@N、S 共掺杂碳（CuS@NSC）蜂窝状复合结构。作为 SIBs 的阳极材料，CuS@NSC 电极表现出超高的初始库仑效率（94.9%）和优异的电化学性能，包括在 0.2 A g 下循环 100 次后具有 441.3 mAh g 的高可逆容量、在 5 A g 下具有出色的倍率性能（380.4 mAh g）以及在 1A g 下循环 700 次后具有约 100%的容量保持率的优异长循环稳定性。
