面向锂硫电池应用的杂化纳米结构
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- 英文论文题名：Nanostructured Hybrid Materials for Lithium-Sulfur Batteries
- 论文作者：侯仰龙
- 英文论文作者：Yanglong Hou ; Department of Materials Science and Engineering College of Engineering ; Peking University
- 年：2016
- 作者机构：北京大学工学院;
- 论文关键词：杂化纳米结构 ; 锂硫电池 ; 正极材料 ; 化学合成
- 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-第四十二分会：能源纳米材料物理化学
- 语种：中文
- 分类号：TB383.1;TM912
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十二分会 ; 能源纳米材料物理化学
- 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：202k
- 原文格式：D
- 会议级别：全国
摘要
锂硫电池具有低成本、高理论容量和环境友好的特点,但是实现其应用仍然存在一些挑战和困难,如严重的自放电、循环寿命短和容量衰减快等问题。本报告将介绍一些杂化纳米结构的化学设计及其锂硫电池正极材料的性能。首先,设计合成了新型的交联、多级Si/SiO_2多孔碳球,用作硫的载体提升锂硫电池性能。基于多孔碳的高比表面和包埋其中的Si/SiO_2的交联网络结构,该杂化球不仅能解决硫负载量低的问题,而且通过化学物理吸附作用吸附负电的多硫化物。研究表明,该杂化球具有高的容量(1215 mAh g~(-1)/0.2 C)和高循环稳定性。其次,通过简单的琼脂碳化过程,设计制备了独特的三维交叉的多孔碳纳米片,可用作硫负载体防止充放电过程中多硫化合物的溶出,而且能够提高导电性和硫承载量。该纳米结构的关键是提供了大孔和介孔结构而使其具有高比表面,这对于多层隔膜防止穿梭效应具有非常重要的作用。由此可见,杂化纳米结构对于提升和优化锂硫电池性能方面展现出重要的潜力。
Herein, we will present some progress on nanostructured hybrid materials for lithium-sulfur batterries. First, we demonstrate a controlled strategy for synthesizing a new class of silicon/silica crosslink with hierarchical porous carbon spheres(Si/SiO_2@C) as high efficient sulfur hosts for promoting LSBs. And then, we propose a unique nanostructure of three dimensional(3D) and interconnected porous carbon nanosheets, synthesized by a simple carbonization of agar, which can be applied as both the effective sulphur host to alleviate the polysulphide anions dissolution in electrolyte during the LSBs cycling, and the advanced conducting support for improving the capacity of electroactive sulphur.
Herein, we will present some progress on nanostructured hybrid materials for lithium-sulfur batterries. First, we demonstrate a controlled strategy for synthesizing a new class of silicon/silica crosslink with hierarchical porous carbon spheres(Si/SiO_2@C) as high efficient sulfur hosts for promoting LSBs. And then, we propose a unique nanostructure of three dimensional(3D) and interconnected porous carbon nanosheets, synthesized by a simple carbonization of agar, which can be applied as both the effective sulphur host to alleviate the polysulphide anions dissolution in electrolyte during the LSBs cycling, and the advanced conducting support for improving the capacity of electroactive sulphur.
引文
[1]Rehman,S.;Guo,S.;Hou,Y.Rational Design of Si/Si O2@Hierarchical Porous Carbon Spheres as Efficient Polysulfide Reservoirs for High-Performance Li–S Battery,Adv.Mater.,2016,Doi 10.1002/adma.201506111.
[2]Rehman,S.;Guo,S.;Hou,Y.3D Vertically Aligned and Interconnected Porous Carbon Nanosheets as Sulphur Immobilizers for High Performance Lithium-Sulphur Batteries,Adv.Energy Mater.2016,DOI:10.1002/aenm.20150251.
[3]Mahmood,N.;Zhu,J.;Rehman,S.;Li,Q.;Hou,Y.Control over Large-Volume Changes of Lithium Battery Anodes via Active-Inactive Metal Alloy Embedded in Porous Carbon,Nano Energy,2015,11:755.
[4]Li,Q.;Mahmood,N.;Zhu,J.;Hou,Y.;Sun,S.Graphene and its Composites with Nanoparticles for Electrochemical Energy Applications,Nano Today,2014,9:668.
[2]Rehman,S.;Guo,S.;Hou,Y.3D Vertically Aligned and Interconnected Porous Carbon Nanosheets as Sulphur Immobilizers for High Performance Lithium-Sulphur Batteries,Adv.Energy Mater.2016,DOI:10.1002/aenm.20150251.
[3]Mahmood,N.;Zhu,J.;Rehman,S.;Li,Q.;Hou,Y.Control over Large-Volume Changes of Lithium Battery Anodes via Active-Inactive Metal Alloy Embedded in Porous Carbon,Nano Energy,2015,11:755.
[4]Li,Q.;Mahmood,N.;Zhu,J.;Hou,Y.;Sun,S.Graphene and its Composites with Nanoparticles for Electrochemical Energy Applications,Nano Today,2014,9:668.