氮掺杂有序介孔碳/硫复合正极材料制备及其化学性能研究
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- 英文论文题名：Synthesis and electrochemical properties of nitrogen-doped ordered mesoporous carbon/sulfur composite as cathode material
- 论文作者：朱欣欣 ; 冯晓珂 ; 周丽娜 ; 李煜 ; 刘丹 ; 屈德宇
- 英文论文作者：Xinxin Zhu ; Xiaoke Feng ; Lina Zhou ; Yu Li ; Dan Liu ; Deyu Qu ; Department of Chemistry ; School of Chemistry ; Chemical Engineering and Life Sciences ; Wuhan University of Technology ; State Key Laboratory of Advanced Technology for Materials Synthesis and Processing ; Wuhan University of Technology
- 年：2016
- 作者机构：武汉理工大学化生学院化学系;武汉理工大学材料复合新技术国家重点实验室;
- 论文关键词：锂硫电池 ; 氮掺杂 ; 穿梭效应 ; 有序介孔碳
- 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：O611.3;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：319k
- 原文格式：D
- 会议级别：全国
摘要
锂硫电池的理论能量密度为2600 Wh/kg,是锂离子二次电池的3-5倍,是极具应用前景的电化学储能体系,但是锂硫电池仍存在正极活性物质利用率低、循环性能差等问题。介孔碳不仅能够提供导电网络,而且丰富的孔径结构对多硫化锂起到了吸附作用,抑制穿梭效应,被广泛用于锂硫电池正极材料[1]。碳材料的表面功能化,引入杂原子或者加入金属氧化物/硫化物,来提高锂硫电池的循环性能和稳定性[2]。本文通过一步法在水溶液中合成具有高度有序的氮掺杂介孔结构的间苯二酚/甲醛树脂基碳材料。与其他合成方法相比,这种方法是一个单步过程,既不需要预聚合也不需要热凝固。经过K0H活化后比表面积增大为1600m~2 g~(-1)并维持了其介观结构的有序性。通过热熔法合成氮掺杂有序介孔碳/硫复合材料,并进行电化学性能的研究。
Lithium-sulfur(Li-S) battery is a promising electrochemical energy storage system that has hightheoretical energy density of 2600 Wh kg~(-1).Unfortunately,the practical use faces with a variety of problems such as low utilization of sulfur and bad cycle life.By introducing heteroatoms to the carbon matrices or adding metal oxides/sulfi des to the sulfur cathodes to improve long-term cycling stability and good rate performances.We proposed here a one-pot route to prepare resorcinol/formaldehyde(RF) resin-based carbon materials with highly ordered mesostructures in an aqueous media.Compared with other techniques,the synthesis is a single-step process;neither prepolymerization nor thermal solidification is needed,and further KOH activation can enhance the surface area to 1866 m~2 g~(-1) without destroying the ordered mesostructures.
Lithium-sulfur(Li-S) battery is a promising electrochemical energy storage system that has hightheoretical energy density of 2600 Wh kg~(-1).Unfortunately,the practical use faces with a variety of problems such as low utilization of sulfur and bad cycle life.By introducing heteroatoms to the carbon matrices or adding metal oxides/sulfi des to the sulfur cathodes to improve long-term cycling stability and good rate performances.We proposed here a one-pot route to prepare resorcinol/formaldehyde(RF) resin-based carbon materials with highly ordered mesostructures in an aqueous media.Compared with other techniques,the synthesis is a single-step process;neither prepolymerization nor thermal solidification is needed,and further KOH activation can enhance the surface area to 1866 m~2 g~(-1) without destroying the ordered mesostructures.
引文
[1]L.Qie,C.X.Zu,A.Manthiram,Adv Energy Mater,2016,6,1502459
[2]Q.Pang,J.Tang,H.Huang,X.Liang,C.Hart,K.C.Tam,L.F.Nazar,Adv.Mater.2015,27,6021
[2]Q.Pang,J.Tang,H.Huang,X.Liang,C.Hart,K.C.Tam,L.F.Nazar,Adv.Mater.2015,27,6021