材料科学
阳极
纳米棒
三元运算
离子
钠离子电池
阴极
化学工程
动力学
电极
氧化还原
钠
纳米技术
化学物理
物理化学
冶金
化学
物理
有机化学
法拉第效率
工程类
量子力学
计算机科学
程序设计语言
作者
Zhidong Tian,Wei Sun,Jiaqi Yu,Jun Yuan,Junxiang Chen,Yangjie Liu,Yichun Ding,Xiangyun Hu,Zhenhai Wen
标识
DOI:10.1002/adfm.202404320
摘要
Abstract The significance of exploring optimal electrode materials cannot be overstated, particularly in mitigating the critical issues posed by sluggish redox kinetics, significant volume variations, and severe structural collapse resulting from the insertion and extraction of sodium ions. These efforts are crucial for enhancing the longevity and rapid charging capabilities of sodium‐ion batteries (SIBs). Herein, a defect engineering strategy for the in situ encapsulation of single‐phase ternary iron phosphoselenide into porous carbon by robust chemical bonds with the formation of rod‐like multicavity nanohybrids (FePSe 3 @C) is presented. The incorporation of Se atom not only modulates the electronic structure of the central metal Fe atom and enhances the intrinsic electrical conductivity, but also generates numerous additional reaction sites and accelerates the reaction kinetics of FePSe 3 @C, as corroborated by theoretical calculations and kinetic analysis. Notably, the FePSe 3 @C demonstrates an outstanding rate capability of 321.7 mAh g −1 even at 20 A g −1 and long cycling stability over 1000 cycles. The sodium‐ion full cell, pairing the FePSe 3 @C anode with the Na 3 V 2 (PO 4 ) 3 @C cathode, exhibits a remarkable energy density of 202 Wh kg −1 , demonstrating its practical applicability. This work provides a controllable defect and morphology engineering strategy to construct advanced materials with fast charge transfer for high‐power/energy SIBs.
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