CaV_6O_(16)·3H_2O纳米带在高性能锂离子电池正极材料领域的应用
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- 英文论文题名：Ultralong Metahewettite CaV_6O_(16)·3H_2O Nanoribbons as Novel Host Materials for Lithium Storage:Towards High-rate and Excellent Long-term Stability
- 论文作者：张祥 ; 杨伟伟 ; 赵浩 ; 刘建国 ; 邹志刚
- 英文论文作者：Xiang Zhang ; Weiwei Yang ; Hao Zhao ; Jianguo Liu ; Zhigang Zou ; College of Engineering and Applied Sciences ; Nanjing University
- 年：2016
- 作者机构：南京大学现代工程与应用科学学院;
- 论文关键词：锂离子电池 ; 正极材料 ; 变针钒钙石 ; 高性能
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十分会：化学电源
- 语种：中文
- 分类号：TM912;O646
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十分会 ; 化学电源
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：396k
- 原文格式：D
- 会议级别：全国
摘要
利用化学法将二价碱土金属元素嵌入钒氧夹层中,获得了一系列结构较稳定的碱土金属基钒酸盐化合物MV_6O_(16)·3H_2O(M=Mg,Ca,Sr,Ba),并首次提出该家族化合物可作为潜在的锂离子电池正极材料。利用电弧放电结合水热两步法合成了该家族一员,即CaV_6O_(16)·3H_2O(变针钒钙石)超长纳米带。研究发现,化合物中的水具有稳定晶体结构与扩张层间距的作用,与嵌入层间的二价碱土金属发挥协同作用,并基于一维结构在储能方面的优势,赋予了该材料长寿命循环稳定性及优异的倍率性能[1]。该工作报道的循环稳定性,为目前钒酸盐基锂离子电池正极材料领域的最佳性能。该项研究工作在为日后寻找良好的钒基嵌锂材料领域可提供指导与借鉴意义。
We incorporated alkaline-earth metals as interlayer materials within the vanadium oxide layered framework,leading to a whole new family of potential Li~+ intercalated materials with a general formula MV_6O_(16)·3H_2O(M = Mg,Ca,Sr,Ba).In this work,we fully studied the first candidate,ultralong metahewettite CaV_6O_(16)·3H_2O nanoribbons,which exhibit excellent long-term cyclability integrated with high-rate kinetics afforded by a synergistic effect between ultralong 1D nanostructures and intercalated Ca ions along with water molecules within the vanadium oxide layered framework.
We incorporated alkaline-earth metals as interlayer materials within the vanadium oxide layered framework,leading to a whole new family of potential Li~+ intercalated materials with a general formula MV_6O_(16)·3H_2O(M = Mg,Ca,Sr,Ba).In this work,we fully studied the first candidate,ultralong metahewettite CaV_6O_(16)·3H_2O nanoribbons,which exhibit excellent long-term cyclability integrated with high-rate kinetics afforded by a synergistic effect between ultralong 1D nanostructures and intercalated Ca ions along with water molecules within the vanadium oxide layered framework.
引文
[1]Zhang,X.;Yang,W.W.;Liu,J.G.;Zhou,Y.;Feng,S.C.;Yan,S.C.;Yao,Y.F.;Wang,G.;Wan,L.;Fang,C.;Zou,Z.G.Nano Energy 2016,22:38.