N掺杂型中空多孔碳碗:提升中空多孔碳材料储能性能的新途径
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- 英文论文题名：N-Doped Hollow Porous Carbon Bowls:a New Way to Enhance the Energy Storage of Hollow Carbon Materials
- 论文作者：裴非 ; 方晓亮
- 英文论文作者：Fei Pei ; Xiaoliang Fang ; Pen-Tung Sah Institute of Micro-Nano Science and Technology ; Xiamen University
- 年：2016
- 作者机构：厦门大学萨本栋微米纳米科学技术研究院;
- 论文关键词：中空多孔结构 ; 碗状结构 ; 锂硫电池
- 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-第二十九分会：电化学材料
- 语种：中文
- 分类号：O613.71
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
- 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：227k
- 原文格式：D
- 会议级别：全国
摘要
中空多孔碳材料因其在储能领域的良好应用前景受到了研究者们的广泛关注~([1])。然而,中空多孔结构的内部空腔会极大地降低材料整体堆积密度,不利于此类材料的实际应用~([2])。基于此,本文发展了一种"二氧化硅辅助的聚苯并噁嗪包裹策略"制备结构参数可控的中空多孔碳材料,并合成出具有高比表面积(2161 m2g~(-1))、高N含量(5.1 at%)和均一碗状结构的N-掺杂型中空多孔碳碗。载硫后的中空多孔碳碗作为锂硫电池正极材料,可以通过碳材料的物理吸附作用和N原子的化学吸附作用抑制充放电过程中的"飞梭效应"从而获得良好容量性能(0.2 C放电比容量1192 mA h g~(-1))、高倍率性能(4 C放电比容量535 mA h g~(-1))和长循环稳定性(1 C充放电400个循环的单圈平均衰减率仅为0.053%)。本文同时证明了碗状结构能够显著提升中空多孔结构的堆积密度和能量密度。此外,本文所发展的合成方法可以成为设计和合成N掺杂型碳材料的普适性方法,并有望应用于超级电容器、催化和生物医学等其它研究领域。
In this work, we developed a facile silica-assisted polybenzoxazine coating strategy for the rational synthesis of N-doped hollow porous carbon bowls(N-HPCB) with a large specific surface area and high nitrogen content. When used as the host material for sulfur cathode, the S/N-HPCB composite exhibited high capacity, rate capability and cycling stability. This work also demonstrated that bowl-like structure can improve interconnection and packing density of hollow porous structure, leading to the significantly enhanced electrochemical and volumetric energy density. More importantly, the developed synthetic methodology in this work can be extended as a versatile platform to construct new N-doped carbon nanomaterials for other applications, such as supercapacitors, catalysis, and biomedical engineering.
In this work, we developed a facile silica-assisted polybenzoxazine coating strategy for the rational synthesis of N-doped hollow porous carbon bowls(N-HPCB) with a large specific surface area and high nitrogen content. When used as the host material for sulfur cathode, the S/N-HPCB composite exhibited high capacity, rate capability and cycling stability. This work also demonstrated that bowl-like structure can improve interconnection and packing density of hollow porous structure, leading to the significantly enhanced electrochemical and volumetric energy density. More importantly, the developed synthetic methodology in this work can be extended as a versatile platform to construct new N-doped carbon nanomaterials for other applications, such as supercapacitors, catalysis, and biomedical engineering.
引文
[1]Liu,J.;Wickramaratne,N.P.;Qiao,S.Z.;Jaroniec M.Nat.Mater.2015,14:763
[2]Liang J.;Yu X.;Zhou H.;Wu H.B.;Ding S.J.;Lou,X.W.Angew.Chem.Int.Ed.2014,53:12803.
[2]Liang J.;Yu X.;Zhou H.;Wu H.B.;Ding S.J.;Lou,X.W.Angew.Chem.Int.Ed.2014,53:12803.