材料科学
法拉第效率
电解质
电容器
电化学
纳米技术
碳纳米管
储能
电极
密度泛函理论
化学工程
膜
溶解
相间
联轴节(管道)
离子
分子动力学
化学物理
复合材料
电压
热力学
有机化学
物理化学
计算化学
化学
功率(物理)
物理
量子力学
工程类
遗传学
生物
作者
Zirui Song,Guiyu Zhang,Xinglan Deng,Ye Tian,Xuhuan Xiao,Wentao Deng,Hongshuai Hou,Guoqiang Zou,Xiaobo Ji
标识
DOI:10.1002/adfm.202205453
摘要
Abstract Interfacial coupling strategy has allured extensive attention for the possibility to endow active electrode materials with superior performance. However, the design of strong coupling engineering with interfacial evolution during electrochemical processes is very challenging. Herein, inspired by the powerful robotic arms and density functional theory calculations, multiple functional groups identified with intense affinity to V atom are successfully grafted on carbon nanotubes (CNTs), thereby in situ building robust interfacial bonds (VOC and VC) to tightly anchor VS 4 particles. The largely decreased band gaps and energy barriers show the fortified conductivity of VS 4 ‐CNT heterostructure. Besides, the spacial confinement effect induced by interfacial linkages substantively enhances the mechanical properties to inhibit structural collapse, and restrains the dissolution of polysulfides as verified by molecular dynamics simulations, thus prolonging life span. Excellent energy density of 105.5 Wh kg –1 can be delivered after assembling full sodium‐ion capacitors (activated carbon//VS 4 ‐CNT). Significantly, the reversible interfacial bonds confirmed by various ex situ characteristics during discharge/charge processes hold the key to remarkable sodium storage ability and prominent initial coulombic efficiency. More impressively, strong interfacial coupling effect can establish synergistic soft‐rigid integrated solid‐electrolyte interphase film, which is conducive to elevating the electrochemical performance of electrodes, convincingly constructing advanced sodium‐ion capacitors.
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