Thiocyanate-improved deep eutectic solvent electrolyte for cathode-free Fe-Li dual-ion batteries

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43933857" target="_blank" >RIV/60461373:22310/25:43933857 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1385894725110371?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1385894725110371?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cej.2025.170193" target="_blank" >10.1016/j.cej.2025.170193</a>

Result language

angličtina

Original language name

Thiocyanate-improved deep eutectic solvent electrolyte for cathode-free Fe-Li dual-ion batteries

Original language description

The advancement of dual-ion batteries that offer enhanced energy and current density at reduced costs is crucial. This study presents a dual cation Fe-Li deep eutectic solvent electrolyte, utilizing lithium perchlorate and ferrous chloride in ethylene glycol (FeLiEG). The high electronegativity of perchlorate ions strengthens the hydrogen bonding with ethylene glycol, thereby imparting anti-freezing properties upon the addition of anhydrous ferrous chloride. The gas evolution at the anode can be further minimized to negligible by incorporating potassium thiocyanate, which facilitates the formation of iron thiocyanate and modifies the iron plating chemistry. However, this addition also results in the deposition of potassium perchlorate during the DES preparation, although this can be removed through centrifugation. The resultant filtered DES (FeLiEG/SCN) retains all the essential properties of the FeLiEG DES electrolyte. The presence of Fe ions within the electrolyte introduces a redox behaviour that facilitates interactions with carbon materials through redox reactions. As a result, the incorporation of Fe ions enables the replacement of the Li metal anode with stainless steel (SS) and allows for the creation of a cathode-free battery using carbon cloth (CC) as its current collector. The system enhanced by potassium thiocyanate demonstrates an ionic conductivity of 3.66 mS cm- 1. In this configuration, a full cell is constructed with SS as the anode and CC as the cathode side current collector, utilizing the FeLiEG/SCN DES electrolyte. This setup achieved an areal capacity of 0.229 mAh cm- 2 at a current density of 1 mA cm- 2, with a maximum energy density of 0.243 mWh cm- 2 (at 0.5 mA cm- 2) and power density of 1.29 mW cm- 2 (at 2 mA cm- 2).

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20400 - Chemical engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Chemical Engineering Journal

ISSN

1385-8947

e-ISSN

1873-3212

Volume of the periodical

525

Issue of the periodical within the volume

DEC 2025

Country of publishing house

CH - SWITZERLAND

Number of pages

12

Pages from-to

nestránkováno

UT code for WoS article

001616032300023

EID of the result in the Scopus database

2-s2.0-105019932150