摘要
由于钠资源较丰富且获取成本较低,近年来,钠离子电池(SIBs)成为研究热点。研究发现,钠离子较大的半径可能导致材料结构不稳定,从而影响SIBs的性能。MoS_(2)作为一种高理论比容量的负极材料,可提供更多的电荷存储空间。然而,钠离子在MoS_(2)中的嵌入/脱嵌可能会引起较大的体积变化,这可能破坏材料的结构,从而缩短SIBs的循环寿命。本研究通过交替电纺技术成功得到了三明治结构的C@MoS_(2)/C@C复合物,作为SIBs的负极材料,该电极在0.1 A/g下经100次循环后,放电比容量仍可维持在270.1 mAh/g,展示出卓越的容量维持能力和稳定的循环性能。此外,动力学分析揭示了C@MoS_(2)/C@C复合物具有显著的电容电荷存储特性。这项研究成果为提高MoS_(2)在SIBs中的稳定性提供了新的视角和方法。
In recent years,sodium-ion batteries have become a hot research topic due to the abundance and cost-effectiveness of sodium resources.Nevertheless,the large radius of Na+may lead to the structural instability of the material,which affects the performance of sodium-ion batteries(SIBs).MoS_(2),as an anode material with high theoretical specific capacity,can provide more charge storage space.However,the intercalation/deintercalation processes of Na+in MoS_(2) may cause large volume changes,which may damage the structure and thus shorten the cycle life.In this study,C@MoS_(2)/C@C complexes with a sandwich structure were successfully prepared by alternating electrospinning technique as an anode material for SIBs.The electrode maintains a discharge specific capacity of 270.1 mAh/g after 100 cycles at 0.1 A/g,showing excellent capacity retention and good cycling stability.In addition,kinetic analyses reveal that C@MoS_(2)/C@C electrode has remarkable capacitive charge storage properties.This work provides new perspectives and methods to improve the stability of MoS_(2) for SIBs.
作者
吴朝晖
黄军同
陈亚兵
陈黎
杨会永
曾海军
周子航
陈智
WU Zhaohui;HUANG Juntong;CHEN Yabing;CHEN Li;YANG Huiyong;ZENG Haijun;ZHOU Zihang;CHEN Zhi(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《铜业工程》
2025年第1期47-55,共9页
Copper Engineering
基金
国家自然科学基金面上基金项目(52272063)
江西省自然科学青年基金项目(20224BAB214037)
江西省自然科学青年基金项目(20232BAB204022,20232BAB204019)资助。
作者简介
吴朝晖(2000-),男,江苏泗洪人,硕士研究生,研究方向:储能材料与器件,E-mail:973764584@qq.com;通信作者:黄军同,教授,E-mail:huangjuntong@163.com;通信作者:陈智,讲师,E-mail:chenzhi_2018@126.com。
