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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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).

Název v anglickém jazyce

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

Popis výsledku anglicky

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).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20400 - Chemical engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Journal

ISSN

1385-8947

e-ISSN

1873-3212

Svazek periodika

525

Číslo periodika v rámci svazku

DEC 2025

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

12

Strana od-do

nestránkováno

Kód UT WoS článku

001616032300023

EID výsledku v databázi Scopus

2-s2.0-105019932150