纳米点
阳极
兴奋剂
材料科学
多孔性
介孔材料
化学工程
锂(药物)
纳米技术
异质结
电极
复合材料
光电子学
化学
催化作用
医学
生物化学
工程类
内分泌学
物理化学
作者
Rong Hua,Hongbao Li,Jianbo Zheng,Rui Wang,Quanwei Ma,Tengfei Zhou,Longhai Zhang,Hongwei Kang,Chaofeng Zhang,Yang Zheng
标识
DOI:10.1016/j.jpowsour.2022.232333
摘要
Sodium ion batteries (SIBs) have been considered as a promising candidate to supersede lithium ion batteries, however, the lack of suitable electrode materials for efficient Na-storage still hinders its practical use. Hence, this work reports a general and effective way to in-situ construction of heterostructured SnSe/SnTe nanodots encapsulated in nitrogen-doped mesoporous carbon matrix (SnSe/[email protected]). In such unique architecture, the porous N-CNFs matrix cannot only provide high electronic/ion conductivity but also alleviate the volume change of SnSe and SnTe, leading to rapid kinetics and robust structure, whereas the ultrasmall SnSe/SnTe heterostructure with built-in interfacial driving force can promote charge transfer kinetics. Meanwhile, the abundant defective sites induced from high-level N-doping is beneficial to Na+ storage. Besides, the formed Sn–C, Se–C, and Te–C bonds can improve the interfacial interaction between SnSe/SnTe and N-CNFs, thus enhancing electronic conductivity, suppressing the aggregation and detachment of active components, and ensuring rapid kinetics and structural integrity. When evaluated as an anode for SIBs, the as-prepared SnSe/[email protected] exhibits high reversible capacity, remarkable cycling stability, and superior rate capability. This work can offer an efficient and universal strategy for designing advanced anode materials with exceptional performance.
科研通智能强力驱动
Strongly Powered by AbleSci AI