空心球状富锂锰基固溶体正极材料的研究
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- 英文论文题名：Study of hollow spherical lithium rich manganese based solid solution cathode materials
- 论文作者：张瑜 ; 王翔 ; 方煜恢 ; 韦标东 ; 李峰 ; 李会峰
- 英文论文作者：Yu Zhang ; Xiang Wang ; Yuhui Fang ; Biaodong Wei ; Feng Li ; Huifeng Li ; Department of Chemistry ; Beijing Normal University
- 年：2016
- 作者机构：北京师范大学化学学院;
- 论文关键词：锂电池正极材料 ; 富锂锰基固溶体 ; 空心球结构
- 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：TQ131.11;O646.54
- 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：255k
- 原文格式：D
- 会议级别：全国
摘要
富锂锰基固溶体正极材料由于其高容量,高工作电压,低成本等优势成为关注的焦点。空心球形结构可以使锂离子从空心球形材料的内表面和外表面两侧同时进行脱嵌,缩短了锂离子在材料内部与电解液之间的扩散传输路径,提高材料的倍率性能的同时大大提高材料整体的利用率~1。本文通过软模板法~2结合水热法及高温煅烧合成由纳米结构的一次颗粒组装成的空心球形Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2,通过调节模板剂的量,控制合成了均匀的空心球形富锂正极材料。XRD测试表明合成的材料具有良好层状结构。SEM表明材料粒径约为5μm左右。通过电化学性能测试发现,空心球结构的富锂固溶体正极材料提高了大倍率下的放电容量,并且具有良好的循环性能。
Rich lithium manganese based cathode materials have attracted much attention due to its high energy density and low cost.The structure of hollow spherical material is beneficial for improving the rate performance.It is due to the shortened transmission distance for Li~+ from the cathode materials to electrolyte.In this paper,hollow spherical materials of Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2 have been prepared through the soft template method combined with hydrothermal and high temperature calcination.X-ray diffraction pattern shows the as-prepared sample has a good layered structure.SEM research results show that the synthesized hollow spheres are uniform in size,with a size about 5 μm.Through the electrochemical performance test,we found that the rich lithium cathode material with hollow sphere structure improves the discharge capacity at high rate and has good cycle performance.
Rich lithium manganese based cathode materials have attracted much attention due to its high energy density and low cost.The structure of hollow spherical material is beneficial for improving the rate performance.It is due to the shortened transmission distance for Li~+ from the cathode materials to electrolyte.In this paper,hollow spherical materials of Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2 have been prepared through the soft template method combined with hydrothermal and high temperature calcination.X-ray diffraction pattern shows the as-prepared sample has a good layered structure.SEM research results show that the synthesized hollow spheres are uniform in size,with a size about 5 μm.Through the electrochemical performance test,we found that the rich lithium cathode material with hollow sphere structure improves the discharge capacity at high rate and has good cycle performance.
引文
[1]Wu,F.;Wang,Z.;Su,Y.;Guan,Y.;Jin,Y.;Yan,N.;Tian,J.;Bao,L.;Chen,S.Journal of Power Sources.2014,267,337-346.
[2]Saha,A.;Bharmoria,P.;Mondal,A.;Ghosh,S.C.;Mahanty,S.;Panda,A.B.J.Mater.Chem.A.2015,3,20297-20304.
[2]Saha,A.;Bharmoria,P.;Mondal,A.;Ghosh,S.C.;Mahanty,S.;Panda,A.B.J.Mater.Chem.A.2015,3,20297-20304.