杂原子
法拉第效率
材料科学
阴极
兴奋剂
石墨烯
离子
插层(化学)
碳纤维
纳米技术
锂(药物)
电极
化学工程
光电子学
无机化学
电化学
化学
复合材料
有机化学
物理化学
戒指(化学)
工程类
内分泌学
复合数
医学
作者
Jiahui Li,Jehad K. El‐Demellawi,Guan Sheng,Jonas Björk,Fanshuai Zeng,Jie Zhou,Xiaxia Liao,Junwei Wu,Johanna Rosén,Xingjun Liu,Husam N. Alshareef,Shaobo Tu
出处
期刊:Energy & environmental materials
日期:2024-04-25
卷期号:7 (5)
被引量:2
摘要
Aluminum (Al)‐ion batteries have emerged as a potential alternative to conventional ion batteries that rely on less abundant and costly materials like lithium. Nonetheless, given the nascent stage of advancement in Al‐ion batteries (AIBs), attaining electrode materials that can leverage both intercalation capacity and structural stability remains challenging. Herein, we demonstrate a C 3 N 4 ‐derived layered N,S heteroatom−doped carbon, obtained at different pyrolysis temperatures, as a cathode material for AIBs, encompassing the diffusion−controlled intercalation and surface‐induced capacity with ultrahigh reversibility. The developed layered N,S‐doped corbon (N,S‐C) cathode, synthesized at 900 °C, delivers a specific capacity of 330 mAh g −1 with a relatively high coulombic efficiency of ~85% after 500 cycles under a current density of 0.5 A g −1 . Owing to its reinforced adsorption capability and enlarged interlayer spacing by doping N and S heteroatoms, the N,S‐C900 cathode demonstrates outstanding energy storage capacity with excellent rate performance (61 mAh g −1 at 20 A g −1 ) and ultrahigh reversibility (90 mAh g −1 at 5 A g −1 after 10 000 cycles).
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