LiV_3O_8/PEDOT复合物正极材料的制备及其电化学性能研究
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- 英文论文题名：Synthesis and electrochemical property of LiV_3O_8/PEDOT composite as a cathode material for lithium secondary batteries
- 论文作者：李文娟 ; 莫璐璐 ; 朱利敏 ; 曹晓雨
- 英文论文作者：Wenjuan Li ; Lulu Mo ; Limin Zhu ; Xiaoyu Cao ; School of Chemistry and Chemical Engineering ; Henan University of Technology
- 年：2016
- 作者机构：河南工业大学化学化工学院;
- 论文关键词：LiV_3O_8 ; LiV_3O_8/PEDOT复合物 ; 正极材料 ; 锂二次电池
- 英文论文关键词：LiV3O8 ; LiV3O8/PEDOT composite ; cathode material ; lithium secondary batteries
- 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：TB332;TM912
- 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：165k
- 原文格式：D
- 会议级别：全国
摘要
层状锂二次电池正极材料钒酸锂(LiV_3O_8)由于其高比容量,低成本,易制备等优点而备受关注~([1])。但该材料循环性能差。因此,我们通过原位聚合法~([2])合成LiV_3O_8/PEDOT复合材料来提高LiV_3O_8的电化学性能。结果显示,图1中原始材料LiV_3O_8在前几周的放电比容量高于LiV_3O_8/PEDOT复合物,可能是因PEDOT的嵌锂能力小于LiV_3O_8材料。18个循环后,复合材料的容量远远高于LiV_3O_8材料,可能是由于聚合物的包覆作用可以抑制在循环过程中LiV_3O_8材料在电解液中的溶解。图2进一步验证了复合物材料电化学性能的优越性,50个循环后LiV_3O_8材料的放电比容量是169 mAh/g,LiV_3O_8/PEDOT复合物的放电比容量为236mAh/g。
Layered LiV_3O_8 as cathode has been studied due to its some merits such as higher specific capacity,lower cost,and easier preparation.However,the cycling stability is not as good as desired.Here,we prepare LiV_3O_8/PEDOT composite by in stiu polymerization.From Fig.1,the specific capacity of LiV_3O_8/PEDOT composite is much higher than that of the pristine LiV_3O_8 after 18 cycles because PEDOT can defeat the dissolution of LiV_3O_8 into the electrolyte.From Fig.2,we can see that the specific capacity of the pristine LiV_3O_8 at 50 th cycle is 169 mAh/g,whereas the specific capacity of LiV_3O_8/PEDOT composite is 236 mAh/g.
Layered LiV_3O_8 as cathode has been studied due to its some merits such as higher specific capacity,lower cost,and easier preparation.However,the cycling stability is not as good as desired.Here,we prepare LiV_3O_8/PEDOT composite by in stiu polymerization.From Fig.1,the specific capacity of LiV_3O_8/PEDOT composite is much higher than that of the pristine LiV_3O_8 after 18 cycles because PEDOT can defeat the dissolution of LiV_3O_8 into the electrolyte.From Fig.2,we can see that the specific capacity of the pristine LiV_3O_8 at 50 th cycle is 169 mAh/g,whereas the specific capacity of LiV_3O_8/PEDOT composite is 236 mAh/g.
引文
[1]Kawakita J;Miura T;Kishi T.J.Power Sources.1999,83(1-2):79-83.
[2]Muraga A V;Kwon C W;Campet G.J.Power Sources.2002,105(1):1-5.
[2]Muraga A V;Kwon C W;Campet G.J.Power Sources.2002,105(1):1-5.