High energy density solid state symmetric supercapacitors using ionic liquid dispersed Li+ ion-perovskites†

IF 3.9 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
RSC Advances Pub Date : 2025-01-27 DOI:10.1039/D4RA07417C
Bhargab Sharma, Shrishti Sharma, Gurpreet Kaur, Hardeep and Anshuman Dalvi
{"title":"High energy density solid state symmetric supercapacitors using ionic liquid dispersed Li+ ion-perovskites†","authors":"Bhargab Sharma, Shrishti Sharma, Gurpreet Kaur, Hardeep and Anshuman Dalvi","doi":"10.1039/D4RA07417C","DOIUrl":null,"url":null,"abstract":"<p >The study reports solid-state ceramic supercapacitors (SSCs) assembled using a novel composite electrolyte based on Li<small><sup>+</sup></small> ion conducting perovskite-type LLTO (Li<small><sub>0.34</sub></small>La<small><sub>0.51</sub></small>TiO<small><sub>3</sub></small>) and an ionic liquid (EMIM BF<small><sub>4</sub></small>). Small amounts of various ionic liquids (ILs) were added to LLTO to enhance the ionic conductivity and improve electrode compatibility. The optimal composition with approximately ∼6 wt% EMIM BF<small><sub>4</sub></small> in LLTO exhibited a high ionic conductivity of around ∼10<small><sup>−3</sup></small> Ω<small><sup>−1</sup></small> cm<small><sup>−1</sup></small> at room temperature, nearly three orders of magnitude higher than that of the pristine LLTO. Optimized electrolyte composition was therefore used for fabrication by compressing between high surface area activated carbon-coated copper electrodes and assembled in an affordable lamination cell geometry. The SSCs demonstrated stable cycling performance for at least 10 000 cycles at 2 V operating voltage and 1.13 A g<small><sup>−1</sup></small> (2 mA) discharge current, with a remarkably high coulombic efficiency of ∼99%. A typical laminated cell at 35 °C exhibited a specific capacitance of around 510 F g<small><sup>−1</sup></small> at 0.57 A g<small><sup>−1</sup></small> (1 mA), and 2 V. Supercapacitors operating below 2 V showed a pure electric double-layer type nature. A stack of 4 cells in series can power two white LEDs (6 V) for ∼40 minutes.</p>","PeriodicalId":102,"journal":{"name":"RSC Advances","volume":" 4","pages":" 2704-2716"},"PeriodicalIF":3.9000,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11770677/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"RSC Advances","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/ra/d4ra07417c","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

The study reports solid-state ceramic supercapacitors (SSCs) assembled using a novel composite electrolyte based on Li+ ion conducting perovskite-type LLTO (Li0.34La0.51TiO3) and an ionic liquid (EMIM BF4). Small amounts of various ionic liquids (ILs) were added to LLTO to enhance the ionic conductivity and improve electrode compatibility. The optimal composition with approximately ∼6 wt% EMIM BF4 in LLTO exhibited a high ionic conductivity of around ∼10−3 Ω−1 cm−1 at room temperature, nearly three orders of magnitude higher than that of the pristine LLTO. Optimized electrolyte composition was therefore used for fabrication by compressing between high surface area activated carbon-coated copper electrodes and assembled in an affordable lamination cell geometry. The SSCs demonstrated stable cycling performance for at least 10 000 cycles at 2 V operating voltage and 1.13 A g−1 (2 mA) discharge current, with a remarkably high coulombic efficiency of ∼99%. A typical laminated cell at 35 °C exhibited a specific capacitance of around 510 F g−1 at 0.57 A g−1 (1 mA), and 2 V. Supercapacitors operating below 2 V showed a pure electric double-layer type nature. A stack of 4 cells in series can power two white LEDs (6 V) for ∼40 minutes.

Abstract Image

求助全文
约1分钟内获得全文 求助全文
来源期刊
RSC Advances
RSC Advances chemical sciences-
CiteScore
7.50
自引率
2.60%
发文量
3116
审稿时长
1.6 months
期刊介绍: An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信