Cited 0 time in webofscience Cited 3 time in scopus

A crystalline organic electrolyte for safe, room-temperature operable all-solid-state sodium batteries

Title
A crystalline organic electrolyte for safe, room-temperature operable all-solid-state sodium batteries
Authors
Kang, SeokbumYang, Chang-Eui.Jeon, BoosikKoo, BonhyeopHong, Seung-TaeLee, Hochun
DGIST Authors
Kang, Seokbum; Yang, Chang-Eui.; Jeon, Boosik; Koo, Bonhyeop; Hong, Seung-TaeLee, Hochun
Issue Date
2021-08
Citation
Energy Storage Materials, 39, 259-264
Type
Article
Author Keywords
Crystalline organic electrolytesMelt-casting processesSodium batteriesSolid electrolytesSolid-state batteries
Keywords
Crystalline materialsElectrochemical electrodesIonic conduction in solidsIonic conductivityPotentiometric sensorsSodiumSodium compoundsSolid state devicesSolid-State BatteriesAll-solid stateCrystalline organic electrolyteDimethyl sulfoneHigher energy densitySafety risksSodium batterySolid state batteriesMelt-casting processOrganic electrolyteSolid electrolytesCarbonate electrolytes
ISSN
2405-8297
Abstract
Owing to their mitigated safety risk and high energy density, all-solid-state sodium batteries are promising post-Li batteries. However, current solid-state electrolytes have insufficient ionic conductivity, electrochemical stability, and contacting ability with porous electrodes. To overcome these issues, this study presents sulfone-based crystalline organic electrolytes (SCOEs) composed of dimethyl sulfone (DMS) and sodium bis(fluorosulfonyl)imide (NaFSI). One particular SCOE (NaFSI/DMS, 2:8 by mol) has high ionic conductivity (7.0 × 10−4 S cm−1) at 25 °C and excellent oxidative stability (>5.5 V vs. Na+/Na). Importantly, the SCOE displays an optimum melting point (66 °C), enabling intimate contact with porous composite electrodes via the melt-casting process. Na||Na3V2(PO4)3 cells employing this SCOE show better cyclability than do cells employing a conventional carbonate electrolyte (capacity retention 91.1% vs. 60.3% after 200 cycles at 25 °C). Additionally, the SCOE has negligible flammability, unlike carbonate electrolytes, thus holding great promise as an electrolyte for safe, room-temperature operable all-solid-state sodium batteries. © 2021 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/15397
DOI
10.1016/j.ensm.2021.04.031
Publisher
Elsevier BV
Related Researcher
  • Author Hong, Seung-Tae Battery Materials Discovery Laboratory
  • Research Interests Magnesium, calcium, and zinc ion batteries; lithium all-solid-state batteries; Inorganic materials discovery; Solid state chemistry; Crystallography; Mg, Ca, Zn 이온 이차전지; 리튬 전고체전지; 신 무기재료 합성; 고체화학; 결정화학
Files:
There are no files associated with this item.
Collection:
Department of Energy Science and EngineeringBattery Materials Discovery Laboratory1. Journal Articles
Department of Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE