干旱区生态环境知识资源中心(Arid): alpha-MnO_2纳米棒/多孔碳正极材料的制备及水系锌离子电池性能研究

Arid

	alpha-MnO_2纳米棒/多孔碳正极材料的制备及水系锌离子电池性能研究
其他题名	Preparation of alpha-MnO_2 Nanorods/Porous Carbon Cathode for Aqueous Zinc-ion Batteries
	李燕丽; 于丹丹; 林森; 孙东飞; 雷自强
来源期刊	化学学报
ISSN	0567-7351
出版年	2021
卷号	79 期号:2 页码:200-207
中文摘要	针对水系锌离子电池锰基正极材料存在比容量低、循环稳定性差等问题,本工作利用水热法制备出棒状结构的 alpha-MnO_2,通过柠檬酸钠高温碳化制备多孔碳,进而通过超声分散等处理制备出alpha-MnO_2/PCSs复合材料.三维的多孔网络有助于提高电子导电性,提供一个稳定的支撑;alpha-MnO_2纳米棒均匀地附着在多孔碳纳米片层表面,有效地避免 alpha-MnO_2的团聚,从而提高锌离子传输效率.得益于alpha-MnO_2/PCSs独特的结构优势,将其作为锌离子电池正极材料,在电流密度为0.1 A·g~(-1)的条件下循环100次后,其可逆容量为350 mAh·g~(-1),在1 A·g~(-1)的大的电流密度下,经过1000圈循环后,容量可达160 mAh·g~(-1),展现了优异的循环稳定性能,有望成为高性能锌离子电池的潜在正极材料.
英文摘要	Aqueous zinc-ion batteries (ZIBs) have attracted more attention as large-scale energy storage technology due to their high safety,low cost and environmental benignity.To date,numerous cathodes based on manganese dioxide,vanadium dioxide,and polyanionic compounds have been reported.Among them,Manganese oxides have the advantages of low cost,non-toxicity,abundant materials and high working voltage,have been widely explored as promising cathodes for zinc ion batteries.Among them,MnO_2 cathodes are particularly desirable candidates for commercialization owing to their tunnel structure and affordability.alpha-MnO_2 has (11) and (22) tunnel structures,and Zn~(2+) can rapidly inserted and deserted in the tunnel.However,the capacity of manganese dioxide is fast decaying with the cycles due to the poor conductivity of MnO_2,which limits its electrochemical performance.Herein,alpha-MnO_2 nanorods are uniformly distributed on the surface of porous carbon nanosheets network (PCSs) by a simple hydrothermal/dispersion method strategy.In the alpha-MnO_2/PCSs architecture,the alpha-MnO_2 nanorods and alpha-MnO_2/PCSs composite were characterized by X-ray diffraction (XRD),scanning electron microscopy(SEM),high-resolution transmission electron microscopy (HRTEM),etc.The results testified that alpha-MnO_2/PCSs nanorods were firmly adhered on the surface of porous carbon nanosheets,which can effectively avoid the stacking of alpha-MnO_2 nanorods,while the high conductive carbon network can improve the electrical conductivity of the composite.The porous network can provide effective electron transfer channels,provide stable hosts for fast Zn~(2+) extraction/insertion,and prevent the alpha-MnO_2 nanorods from stacking each other.Benefiting from the unique porous structure and high conductive network,the alpha-MnO_2/PCSs hybrid shows high reversibility capacity,good rate performance,and outstanding cycling stability.Specifically,alpha-MnO_2/PCSs exhibits high reversible capacity of 350 mAh·g~(-1) after 100 cycles at 0.1 A·g~(-1) and maintains a capacity of 160 mAh·g~(-1) at a high rate of 1 A·g~(-1) after 1000 cycles,thus making it promising cathode for the high performance ZIBs.
中文关键词	水系锌离子电池 ; 正极材料 ; alpha-MnO_2纳米棒 ; 多孔碳纳米片 ; 电化学性能
英文关键词	aqueous zinc ion battery cathode material alpha-MnO_2 nanorods porous carbon nanosheets electrochemical performance
类型	Article
语种	中文
开放获取类型	Bronze
收录类别	CSCD
WOS类目	Engineering
CSCD记录号	CSCD:6922938
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377737
作者单位	李燕丽, 西北师范大学化学化工学院, 生态功能高分子材料教育部重点实验室, 兰州, 甘肃 730070, 中国.; 于丹丹, 西北师范大学化学化工学院, 生态功能高分子材料教育部重点实验室, 兰州, 甘肃 730070, 中国.; 林森, 西北师范大学化学化工学院, 生态功能高分子材料教育部重点实验室, 兰州, 甘肃 730070, 中国.; 孙东飞, 西北师范大学化学化工学院, 生态功能高分子材料教育部重点实验室, 兰州, 甘肃 730070, 中国.; 雷自强, 西北师范大学化学化工学院, 生态功能高分子材料教育部重点实验室, 兰州, 甘肃 730070, 中国.
推荐引用方式 GB/T 7714	李燕丽,于丹丹,林森,等. alpha-MnO_2纳米棒/多孔碳正极材料的制备及水系锌离子电池性能研究[J],2021,79(2):200-207.
APA	李燕丽,于丹丹,林森,孙东飞,&雷自强.(2021).alpha-MnO_2纳米棒/多孔碳正极材料的制备及水系锌离子电池性能研究.化学学报,79(2),200-207.
MLA	李燕丽,et al."alpha-MnO_2纳米棒/多孔碳正极材料的制备及水系锌离子电池性能研究".化学学报 79.2(2021):200-207.