Facile Synthesis of LaCoO3 with a High Oxygen Vacancy Concentration by the Plasma Etching Technique for High-Performance Oxygen Ion Intercalation Pseudocapacitors

doi:10.1021/acsaem.9b01558

	Facile Synthesis of LaCoO3 with a High Oxygen Vacancy Concentration by the Plasma Etching Technique for High-Performance Oxygen Ion Intercalation Pseudocapacitors
	Guo, Guanlun 1,3; Ouyang, Kang 1,3; Yu, Jipan 1,3; Liu, Yihui 1,3; Feng, Shuanglong 4; Wei, Mingrui 2
刊名	ACS APPLIED ENERGY MATERIALS
	2020
卷号	3 期号:1 页码:300-308
关键词	LaCoO3 nanoparticles plasma etching technique oxygen vacancy pseudocapacitors anion-intercalation energy storage mechanism
ISSN号	2574-0962
DOI	10.1021/acsaem.9b01558
通讯作者	Liu, Yihui(liuyihui@whut.edu.cn) ; Feng, Shuanglong(fengshuanglong@cigit.ac.cn) ; Wei, Mingrui(weimingrui@whut.edu.cn)
英文摘要	The content of oxygen vacancy, as the intercalation places of oxygen during the oxygen ion intercalation process, has a significant influence on the electrochemical properties of the perovskite pseudocapacitance. To enhance the electrochemical performance of perovskite supercapacitors, we propose a novel strategy of the plasma etching technique to improve the oxygen vacancy concentration of the LaCoO3 electrode. The influence of plasma composition and etching time on the etching effect was investigated. Results show that the etching effect of H-2 is better than that of Ar. The specific capacitance of the LaCoO3 electrode etched for 5 min in 10 sccm H-2 and 90 sccm Ar increased from 339.8 F g(-1) to 706.9 F g(-1). The asymmetric supercapacitor assembled with graphene oxide delivers a high energy density of 47.64 Wh kg(-1) at a power density of 804.4 W kg(-1) and still maintains 35.02 Wh kg(-1) at a high power density of 37 080 W After kg(-1). 4000 cycles at 5 A g(-1), there is little degradation of specific capacitance with the Coulombic efficiency maintaining a high level of 96%. It can be concluded that the plasma etching technique is an efficient way to improve the energy storage performance of perovskite pseudocapacitive materials.
资助项目	111 Project[B17034]
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000510104700036
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/10416]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Liu, Yihui; Feng, Shuanglong; Wei, Mingrui
作者单位	1.Wuhan Univ Technol, Hubei Collaborat Innovat Ctr Automot Components T, Wuhan 430070, Peoples R China 2.Wuhan Univ Technol, Sch Automot Engn, Wuhan 430070, Peoples R China 3.Wuhan Univ Technol, Hubei Key Lab Adv Technol Automot Components, Wuhan 430070, Peoples R China 4.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式 GB/T 7714	Guo, Guanlun,Ouyang, Kang,Yu, Jipan,et al. Facile Synthesis of LaCoO3 with a High Oxygen Vacancy Concentration by the Plasma Etching Technique for High-Performance Oxygen Ion Intercalation Pseudocapacitors[J]. ACS APPLIED ENERGY MATERIALS,2020,3(1):300-308.
APA	Guo, Guanlun,Ouyang, Kang,Yu, Jipan,Liu, Yihui,Feng, Shuanglong,&Wei, Mingrui.(2020).Facile Synthesis of LaCoO3 with a High Oxygen Vacancy Concentration by the Plasma Etching Technique for High-Performance Oxygen Ion Intercalation Pseudocapacitors.ACS APPLIED ENERGY MATERIALS,3(1),300-308.
MLA	Guo, Guanlun,et al."Facile Synthesis of LaCoO3 with a High Oxygen Vacancy Concentration by the Plasma Etching Technique for High-Performance Oxygen Ion Intercalation Pseudocapacitors".ACS APPLIED ENERGY MATERIALS 3.1(2020):300-308.