二维材料和共轭聚合物在低成本和安全能源存储的应用
详细信息 查看官网全文
- 英文论文题名：Designing Two-Dimensional Materials and Conjugated Redox Polymers for Safe and Low-Cost Energy Storage
- 论文作者：姚彦
- 英文论文作者：Yan Yao ; Department of Electrical Engineering ; University of Houston ; Texas Center for Superconductivity
- 年：2016
- 作者机构：休斯敦大学;德州超导中心;
- 论文关键词：镁离子电池 ; 聚合物电池储能
- 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
- 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：321k
- 原文格式：D
- 会议级别：全国
摘要
镁离子电池由于镁负极在循环沉积过程没有枝晶的产生,作为一种安全的电池受到了广泛的关注。但由于二价镁离子和载体的强烈库伦相互作用,镁离子的迁移率非常低以至比容量非常有限。我们最近发现改变二维材料的层间距可以非常有效的提高镁离子的迁移率,镁离子的容量大幅度提高。另外,我们通过共轭高分子材料的设计,得到了100C倍率下仍然可以得到95%的理论容量,并且循环3000次仍然保持了96%的容量。这些新型材料的研究对低成本和安全能源存储有极大的应用价值。
In the first part of this presentation,I will show our recent work using an interlayer expansion approach to overcome the large Mg~(2+) ion diffusion barrier to significantly enhance the diffusivity in Mg rechargeable batteries.[1]Theory,synthesis,electrochemical measurements,and kinetic analysis are combined to improve Mg diffusion behavior in MoS_2,which is a poor Mg transporting material in its pristine form.The expansion boosts Mg conductivity by two orders of magnitude,effectively enabling the otherwise barely active MoS_2 to approach its theoretical storage capacity as well as to achieve one of the highest rate capabilities.In the second part,I will demonstrate a "π-conjugated redox polymer" simultaneously featuring a π-conjugated backbone and integrated redox sites,which can be stably and reversibly n-doped to a high doping level of 2.0 with significantly enhanced electronic conductivity.P(NDI2OD-T2) delivers 95%of its theoretical capacity at a high rate of 100C(72 s per charge-discharge cycle) under practical measurement conditions as well as 96%capacity retention after 3000 cycles of deep discharge-charge.[2]
In the first part of this presentation,I will show our recent work using an interlayer expansion approach to overcome the large Mg~(2+) ion diffusion barrier to significantly enhance the diffusivity in Mg rechargeable batteries.[1]Theory,synthesis,electrochemical measurements,and kinetic analysis are combined to improve Mg diffusion behavior in MoS_2,which is a poor Mg transporting material in its pristine form.The expansion boosts Mg conductivity by two orders of magnitude,effectively enabling the otherwise barely active MoS_2 to approach its theoretical storage capacity as well as to achieve one of the highest rate capabilities.In the second part,I will demonstrate a "π-conjugated redox polymer" simultaneously featuring a π-conjugated backbone and integrated redox sites,which can be stably and reversibly n-doped to a high doping level of 2.0 with significantly enhanced electronic conductivity.P(NDI2OD-T2) delivers 95%of its theoretical capacity at a high rate of 100C(72 s per charge-discharge cycle) under practical measurement conditions as well as 96%capacity retention after 3000 cycles of deep discharge-charge.[2]
引文
[1]Yanliang Liang,Hyun Deog Yoo,Yifei Li,and Yan Yao*,Nano Letters,2015,15,2194-2202.
[2]Yanliang Liang,Zhihua Chen,Yan Jing,Yaoguang Rong,Antonio Facchetti,and Yan Yao*,J.Am.Chem.Soc.2015,137,4956-4959.
[2]Yanliang Liang,Zhihua Chen,Yan Jing,Yaoguang Rong,Antonio Facchetti,and Yan Yao*,J.Am.Chem.Soc.2015,137,4956-4959.