氮、磷共掺杂石墨烯作为超高循环稳定性锂硫电池正极材料
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- 英文论文题名：Nitrogen and Phosphorus Dual-doped Graphene-Based Porous Carbon for High-Performance Lithium-Sulfur Batteries
- 论文作者：陈琛煜 ; 唐城 ; 王浩帆 ; 张强
- 英文论文作者：Chen-Yu Chen ; Cheng Tang ; Hao-Fan Wang ; Qiang Zhang ; Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology ; Department of Chemical Engineering ; Tsinghua University
- 年：2016
- 作者机构：清华大学化学工程系·绿色反应工程与工艺北京市重点实验室北京市清华大学工物馆;
- 论文关键词：石墨烯 ; 双掺杂 ; 氮磷共掺杂 ; 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-第三十九分会：纳米碳材料
- 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-第三十九分会 ; 纳米碳材料
- 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：280k
- 原文格式：D
- 会议级别：全国
摘要
开发具有高稳定性和高比容量的Li-S电池正极材料,一直是一项引人注目并富有挑战的课题。石墨烯作为S正极材料,凭借其高比表面积和高导电性的优势受到广泛的关注。然而,石墨烯材料作为S正极,不能有效地吸附和锚定多硫化物,降低了Li-S电池的循环稳定性。我们通过与石墨烯原位复合植酸、苯胺共聚物,在石墨烯表面均匀分散粒径约20nm的N、P共聚物,得到N、P共掺杂的石墨烯材料(NPGO)。作为S正极材料,在充放电过程中能够强烈吸附多硫化物,保持超高的循环稳定性和电池比容量。这种复合石墨烯材料,首圈比容量达到1140 mAh g~(-1),500圈平均衰减率为0.07%。
It is desirable but challenging to develop effective and highly stable sulfur cathode for lithium-sulfur batteries. Graphene has attracted increasing attention as sulfur cathode material to improve the conductivity. Nevertheless, graphene is not an effective material to confine sulfur in cathodes. Herein, by in-situ polymerization of aniline(nitrogen source) and phytic acid(phosphorus source), we synthesized N, P dual-doped graphene based carbon material as sulfur cathode to intensively adsorb polysulfide and improve the cycling stability. In this work, the sulfur is uniformly dispersed in both surfaces of the graphene. The as-prepared material shows a capacity of 1140 mAh g~(-1) electrode and a decay rate of capacity of 0.07% per cycle during the first 500 cycles.
It is desirable but challenging to develop effective and highly stable sulfur cathode for lithium-sulfur batteries. Graphene has attracted increasing attention as sulfur cathode material to improve the conductivity. Nevertheless, graphene is not an effective material to confine sulfur in cathodes. Herein, by in-situ polymerization of aniline(nitrogen source) and phytic acid(phosphorus source), we synthesized N, P dual-doped graphene based carbon material as sulfur cathode to intensively adsorb polysulfide and improve the cycling stability. In this work, the sulfur is uniformly dispersed in both surfaces of the graphene. The as-prepared material shows a capacity of 1140 mAh g~(-1) electrode and a decay rate of capacity of 0.07% per cycle during the first 500 cycles.
引文
[1]Tang,C.,Zhang,Q.,Zhao,M.Q.,Huang,J.Q.,Cheng,X.B.,Tian,G.L.,Wei,F.Advanced Materials.2014,26(35):6100-6105.
[2]Yuan,Z.,Peng,H.J.,Huang,J.Q.,Liu,X.Y.,Wang,D.W.,Cheng,X.B.,&Zhang,Q..Advanced Functional Materials,2014 24(39):6105-6112.
[2]Yuan,Z.,Peng,H.J.,Huang,J.Q.,Liu,X.Y.,Wang,D.W.,Cheng,X.B.,&Zhang,Q..Advanced Functional Materials,2014 24(39):6105-6112.