超薄富氮二维碳纳米片的构筑及其在超级电容器领域的应用研究
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- 英文论文题名：Ultrathin Nitrogen-Enriched Hybrid Carbon Nanosheets for Supercapacitors with Ultrahigh Rate Performance and High Energy Density
- 论文作者：李少锋 ; 于畅 ; 杨卷 ; 赵昌泰 ; 黄华伟 ; 韩晓彤 ; 邱介山
- 英文论文作者：Shaofeng Li ; Chang Yu ; Juan Yang ; Changtai Zhao ; Huawei Huang ; Xiaotong Han ; Jieshan Qiu ; State Key Lab of Fine Chemicals ; Liaoning Key Lab for Energy Materials and Chemical Engineering ; PSU-DUT Joint Center for Energy Research ; Dalian University of Technology
- 年：2016
- 作者机构：精细化工国家重点实验室辽宁省能源材料化工重点实验室美国PSU-DUT联合能源研究中心大连理工大学;
- 论文关键词：碳纳米片 ; 超薄 ; 富氮 ; 超级电容器 ; 倍率性能
- 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-第三十九分会：纳米碳材料
- 语种：中文
- 分类号：TM53
- 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：167k
- 原文格式：D
- 会议级别：全国
摘要
超级电容器作为一种新型储能器件,具有充电时间短、使用寿命长和绿色环保等特点,成为电化学储能领域研究的热点。倍率性能差和能量密度低是超级电容器大规模应用的瓶颈性难题。本文利用氧化石墨烯作为结构导向剂,制备出超薄富氮杂化碳纳米片(HCNS),并用于超级电容器电极材料,其表现出非常优异的电化学性能:在6 M KOH电解液中,当电流密度为0.5 Ag~(-1)时,HCNS的质量比电容可达227 Fg~(-1),当电流密度增加至100 Ag~(-1)时,其比电容保持率可达到70%,并且其在10 Ag~(-1)的电流密度下循环10000次,比电容保持率几乎为100%;此外,HCNS在BMIMPF6离子液体电解液中,111 Wkg~(-1)的功率密度下,能量密度可以达到86.5 Wh kg~(-1)。
Ultrathin nitrogen-enriched hybrid carbon nanosheets(HCNS) with thickness of approximately 3.6 nm composed of graphene and porous carbon layers were configured via employing a graphene oxide directed strategy. Benefiting from the nitrogen-enriched species(8.92 wt% N content), highly exposed electroactive sites and fast ion/electron transport stemmed from the porous and ultrathin nanosheet structure, the HCNS electrode exhibits remarkably enhanced electrochemical characteristics with a high specific capacitance of 227 F g~(-1) at 0.5 A g~(-1) and superior rate capability(70% capacitance retention at 100 A g~(-1)) in 6 M KOH electrolyte. More importantly, it delivers a high energy density of 86.5 Wh kg~(-1) at a power density of 111 W kg~(-1) in a 1-butyl-3-methylimidazolium hexafluorophosphate(BMIMPF6) ionic liquid electrolyte. This strategy may shed a new light on the configuration of nitrogen-enriched and ultrathin 2D carbon nanomaterials for high-efficiency energy storage and conversion devices.
Ultrathin nitrogen-enriched hybrid carbon nanosheets(HCNS) with thickness of approximately 3.6 nm composed of graphene and porous carbon layers were configured via employing a graphene oxide directed strategy. Benefiting from the nitrogen-enriched species(8.92 wt% N content), highly exposed electroactive sites and fast ion/electron transport stemmed from the porous and ultrathin nanosheet structure, the HCNS electrode exhibits remarkably enhanced electrochemical characteristics with a high specific capacitance of 227 F g~(-1) at 0.5 A g~(-1) and superior rate capability(70% capacitance retention at 100 A g~(-1)) in 6 M KOH electrolyte. More importantly, it delivers a high energy density of 86.5 Wh kg~(-1) at a power density of 111 W kg~(-1) in a 1-butyl-3-methylimidazolium hexafluorophosphate(BMIMPF6) ionic liquid electrolyte. This strategy may shed a new light on the configuration of nitrogen-enriched and ultrathin 2D carbon nanomaterials for high-efficiency energy storage and conversion devices.
引文
[1]Li,S.;Yu,C.;Yang,J.;Zhao,C.;Huang,H.;Han,X.;Qiu,J.To be submitted.