Tailoring ion dynamics in energy storage conductors for ultra-stable, high-performance solid-state microsupercapacitor array
- Title
- Tailoring ion dynamics in energy storage conductors for ultra-stable, high-performance solid-state microsupercapacitor array
- Author
- 김재균
- Keywords
- Ionic gel polymer electrolyte (IGPE); Molecular dynamic simulation; Reversible reaction; microsupercapacitor (MSC); Ultra-stable lifetime
- Issue Date
- 2023-09-15
- Publisher
- ELSEVIER SCIENCE SA
- Citation
- CHEMICAL ENGINEERING JOURNAL, v. 472, Article NO 144903, Page. 1-10
- Abstract
- All-solid-state electrochemical energy storage (EES) devices with prolonged lifetime, operational stability, and mechanical flexibility can be a promising route to powering up wearable electronics. However, conventional EES devices have been often hindered by a gradual decrease in energy capacity due to low ionic conducting electrolytes, non-suitable electrode materials, or poor electrode/electrolyte interfaces. Herein, we propose a harmonization of the molecular-level tailoring of ionic gel polymer electrolyte (IGPE) and graphene-based electrodes, significantly improving and sustaining the electrochemical performance (11.9 μWh cm− 2) of EES microsupercapacitor (MSC) devices. Our optimized MSC device based on ethyl-3-methylimidazolium bis(fluorosulfonyl)imide (EMIM-FSI) and nterdigitated reduced-graphene oxide (rGO) electrode array maintains 99 % of the initial electrochemical capacity even after 20,000 cycles, also demonstrating the excellent mechanical flexibility (bending radius up to 4 mm) and environmental stability (>30 days) of the MSC-based array. Molecular-level simulation and spectroscopic atomic analysis revealed noticeably lower residual ionic liquid (IL) molecules of EMIM-FSI, compared to EMIM-trifluoromethyl FSI, between the graphene-based layers of electrodes during the charge/discharge cycles. Therefore, our optimization strategy and findings will pave the way to accomplish next-generation of all-solid-state EES devices with ultra-high operational stability, powering wearable electronics.
- URI
- https://information.hanyang.ac.kr/#/eds/detail?an=001055188200001&dbId=edswschttps://repository.hanyang.ac.kr/handle/20.500.11754/190348
- ISSN
- 1385-8947; 1873-3212
- DOI
- 10.1016/j.cej.2023.144903
- Appears in Collections:
- COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY[E](과학기술융합대학) > PHOTONICS AND NANOELECTRONICS(나노광전자학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML