硬炭微球/MXene柔性薄膜负极应用于高性能钠离子存储  

A flexible hard carbon microsphere/MXene film as a high-performance anode for sodium-ion storage

作　　者：曹海亮 杨良滔 赵敏[1] 刘培植[1] 郭春丽 许并社[1,3] 郭俊杰 CAO Hai-liang;YANG Liang-tao;ZHAO Min;LIU Pei-zhi;GUO Chun-li;XU Bing-she;GUO Jun-jie(Key Laboratory of Interface Science and Engineering in Advanced Materials,Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China;Shenzhen Institute of Advanced Technologies,Chinese Academy of Sciences,Shenzhen 518055,China;Materials Institute of Atomic and Molecular Science,Shaanxi University of Science&Technology,Xi'an 710021,China)

机构地区：[1]太原理工大学,新材料界面科学与工程教育部重点实验室,山西太原030024 [2]中国科学院深圳技术研究院,广东深圳518055 [3]陕西科技大学,材料原子分子科学研究所,陕西西安710021

出　　处：《新型炭材料（中英文）》2022年第6期1154-1162,共9页New Carbon Materials

基　　金：国家自然科学基金(U1810204,U1910210,U21A20174),山西省应用基础研究计划青年科技研究基金(201901D211046,20210302123115).

摘　　要：硬炭被认为是钠离子电池最有前景的负极材料,但在嵌钠/脱钠过程中的体积变化限制了硬炭的循环寿命。本文构建了一种无黏结剂、集流体的硬炭微球/MXene薄膜电极,并对其钠离子的存储性能进行了研究。以山西老陈醋为液相碳源,制备了单分散的硬炭微球(HCS)。利用二维Ti_(3)C_(2)T_(x) MXene纳米片作为多功能导电黏结剂制备了柔性薄膜电极。值得注意的是,受益于三维导电网络,Ti_(3)C_(2)T_(x)构建的薄膜电极具有346 mAhg^(−1)的高比容量,优异的倍率性能和超过1000次的优异循环稳定性。如此优异的电化学性能表明该薄膜有望成为一种非常有前景的下一代柔性钠离子电池的负极。Hard carbon is considered the most promising anode material for sodium-ion batteries,but its volume change during sodiation/desodiation limits its cycle life.Hard carbon microspheres(HCSs)with no binder were composited with a MXene film to form an electrode and its sodium storage properties were studied.The microspheres were prepared using Shanxi aged vinegar as a liquid carbon source.Two-dimensional Ti_(3)C_(2)T_(x) MXene(T is a functional group)was used as a multifunctional conductive binder to fabricate the flexible electrodes.Remarkably,because of the three-dimensional conductive network,the HCS/Ti_(3)C_(2)T_(x) film electrode has a high capacity of 346 mAh g^(−1),excellent rate performance and outstanding cycling stability over 1000 cycles.This remarkable electrochemical performance indicates that the flexible film is a very promising anode for next-generation sodium-ion batteries.

关 键 词：钠离子电池 硬炭微球 MXene 负极 柔性 

分 类 号：TB33[一般工业技术—材料科学与工程]