摘要
以可持续的生物质为前驱体的碳材料具有成本低、可再生、资源丰富和环境友好的特点,将其作为下一代钠离子电池的负极材料极具发展的可持续性。以生物质为来源的碳材料一般为硬碳,其空间碳原子层排列无序且不连续,并易形成大量空隙,可为离子存储提供丰富的反应活性位点。利用制备时间短、反应易控的草酸钾高温刻蚀法制备并以杨絮前驱体碳化得到的三维材料,拥有良好的导电性、较大的比表面积和发达的三维空间结构,有利于与电解液的接触与渗透,减小离子传输距离。杨絮衍生的生物质碳材料作为钠离子电池负极材料,表现出优异的电化学性能:在2 A/g的电流密度下循环400圈后的比容量为150 mAh/g;且在10 A/g的电流密度下,该材料依然拥有将近110 mAh/g的比容量,展现了良好的循环性能和倍率性能,为将生物质碳材料作为高储存能力和长寿命的钠离子电池负极的持续开发和实际应用提供了实验依据。
Owing to the advantages of low cost,renewable,abundant resources and environmental friendliness,carbon materials derived from sustainable biomass have the potential to be the anode materials as the sodium ion batteries,which can provide sustainable development possibilities for the development of the next generation of sodium ion batteries.Furthermore,the carbon materials derived from biomass are generally hard carbon,whose spatial carbon atomic layers are disordered and discontinuous with a large number of voids,providing abundant reactive sites for ion storage.In this paper,the three-dimensional(3D)carbon material derived from poplar catkins was firstly controllable prepared by potassium oxalate etching.The obtained carbon material had high electrical conductivity,large surface area,and developed hierarchical space structure,which was conducive to the contact and penetration of electrolyte,reduce ion transport distance,so as to improve electrochemical performance.Therefore,when the obtained 3D carbon material was used as the anode material of sodium ion batteries,it showed excellent electrochemical performance.At the current density of 2 A/g,the specific caapplication of biomass carbon materials as the anode of sodium ion batteries with high storage capacity and long life current density of 10 A/g,showing a good rate performance.pacity of 150 mAh/g after 400 cycles was obtained.And the carbon materials delivered a specific capacity of nearly 110 mAh/g at the This work provided pave the way for the future development and practical.
作者
位帅洁
贾新龙
郭嘉骏
李丹
WEI Shuaijie;JIA Xinlong;GUO Jiajun;LI Dan(College of Chemistry,Zhengzhou University,Zhengzhou 450001,China)
出处
《铜业工程》
CAS
2023年第4期32-38,共7页
Copper Engineering
基金
河南省自然科学基金项目(222300420083)资助。
关键词
生物质
碳材料
负极材料
钠离子电池
杨絮
biomass
carbon material
anode material
sodium ion batteries
poplar catkins
