CAS OpenIR
Unveiling of the energy storage mechanisms of multi -modified (Nb2O5@C)/rGO nanoarrays as anode for high voltage supercapacitors with formulated ionic liquid electrolytes
Zhang, Jiahe1,2; Zhang, Haitao1; Zhang, Yaqin1; Zhang, Junwei3; He, Hongyan1; Zhang, Xixiang3; Shim, Jae-Jin4; Zhang, Suojiang1
2019-08-01
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume313Pages:532-543
AbstractA better understanding of the energy-storage mechanisms in complex pseudocapacitive nanostructures is essential to improve the performances of nanohybrid supercapacitors. In this study, highly interface modified Nb2O5 nanoarrays, attached to graphene nanosheets, were carefully designed and synthesized. The electrochemical performances were evaluated in an organic electrolyte, a formulated ionic-liquid mixture electrolyte, and a nanocomposite ionogel electrolyte, respectively. The capacitive and faradaic storage contributions were assessed qualitatively in diverse electrolytes at various temperatures. The capacitive contribution in the ionic liquid electrolyte was found to rise with increasing temperature. A molecular dynamics simulation proved that the increased diffusion coefficient of large ions was much more pronounced than that of the small Li+ ions. A carefully optimized quasi-solid-state lithium ion capacitor, fabricated using a (Nb2O5@C)/rGO nanoarchitecture as the anode and an ionic liquid gel separator, delivered an energy density of 101 Wh kg(-1) and a power density of 24 kW kg(-1) at 60 degrees C. The efficient coupling between the nanohybrids and a complex ionogel electrolyte opens a new window for the rational design of high energy-density supercapacitors. (C) 2019 Elsevier Ltd. All rights reserved.
KeywordNanohybrid electrode Ionic liquid Asymmetric supercapacitor Storage mechanism
DOI10.1016/j.electacta.2019.04.160
Language英语
WOS KeywordASYMMETRIC SUPERCAPACITORS ; POLYMER ELECTROLYTE ; NB2O5 NANOCRYSTALS ; LI+-INTERCALATION ; CARBON NANOTUBES ; LITHIUM STORAGE ; ULTRAHIGH-RATE ; THIN-FILMS ; HIGH-POWER ; COMPOSITE
Funding ProjectNational Key Research and Development Program of China[2016YFB0100303] ; Major Program of National Natural Science Foundation of China[21890762] ; National Natural Science Foundation of China[21878308] ; International Cooperation and Exchange of the National Natural Science Foundation of China[51561145020]
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
Funding OrganizationNational Key Research and Development Program of China ; Major Program of National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Cooperation and Exchange of the National Natural Science Foundation of China
WOS IDWOS:000470236500056
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/29926
Collection中国科学院过程工程研究所
Corresponding AuthorZhang, Haitao; Zhang, Suojiang
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
3.King Abdullah Univ Sci & Technol, Div Phys Sci & Engn, Thuwal 239556900, Saudi Arabia
4.Yeungnam Univ, Sch Chem Engn, 280 Daehak Ro, Gyongsan 38541, Gyeongbuk, South Korea
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Zhang, Jiahe,Zhang, Haitao,Zhang, Yaqin,et al. Unveiling of the energy storage mechanisms of multi -modified (Nb2O5@C)/rGO nanoarrays as anode for high voltage supercapacitors with formulated ionic liquid electrolytes[J]. ELECTROCHIMICA ACTA,2019,313:532-543.
APA Zhang, Jiahe.,Zhang, Haitao.,Zhang, Yaqin.,Zhang, Junwei.,He, Hongyan.,...&Zhang, Suojiang.(2019).Unveiling of the energy storage mechanisms of multi -modified (Nb2O5@C)/rGO nanoarrays as anode for high voltage supercapacitors with formulated ionic liquid electrolytes.ELECTROCHIMICA ACTA,313,532-543.
MLA Zhang, Jiahe,et al."Unveiling of the energy storage mechanisms of multi -modified (Nb2O5@C)/rGO nanoarrays as anode for high voltage supercapacitors with formulated ionic liquid electrolytes".ELECTROCHIMICA ACTA 313(2019):532-543.
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