Dual Li-ion migration channels in an ester-rich copolymer/ionic liquid quasi-solid-state electrolyte for high-performance Li-S batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F21%3A63528318" target="_blank" >RIV/70883521:28610/21:63528318 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2021/TA/D0TA11180E#!divAbstract" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2021/TA/D0TA11180E#!divAbstract</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d0ta11180e" target="_blank" >10.1039/d0ta11180e</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dual Li-ion migration channels in an ester-rich copolymer/ionic liquid quasi-solid-state electrolyte for high-performance Li-S batteries

Popis výsledku v původním jazyce

Solid-state polymer electrolytes are expected to fundamentally solve the instability and safety problems of liquid electrolytes for lithium-sulfur batteries. Herein, ionic liquids were introduced on the basis of constructing ester-rich copolymers, and dual Li-ion migration channels were built in an ester-rich copolymer/ionic liquid quasi-solid-state electrolyte (SPE-IL). “Association-disassociation” with the carbonyl groups and rapid ion exchange with the ionic liquids are the two migration modes that synergistically increase the room temperature ionic conductivity of the SPE-IL. In addition, the abundant ester groups provide strong chemisorption on lithium polysulfides and successfully inhibit the sulfur shuttle. More importantly, ionic liquids realize the “soft contact” between the electrode and the electrolyte, which is conducive to the construction of stable interfaces. Together with the GPa-level high modulus brought by vinyl carbonate, the formation of lithium dendrites is inhibited. As a result, the assembled lithium-sulfur battery displayed a high initial discharge capacity of 1106 mA h g−1, good cycling stability (80.2% capacity retention after 300 cycles at 0.1 C) and superior rate performance.

Název v anglickém jazyce

Dual Li-ion migration channels in an ester-rich copolymer/ionic liquid quasi-solid-state electrolyte for high-performance Li-S batteries

Popis výsledku anglicky

Solid-state polymer electrolytes are expected to fundamentally solve the instability and safety problems of liquid electrolytes for lithium-sulfur batteries. Herein, ionic liquids were introduced on the basis of constructing ester-rich copolymers, and dual Li-ion migration channels were built in an ester-rich copolymer/ionic liquid quasi-solid-state electrolyte (SPE-IL). “Association-disassociation” with the carbonyl groups and rapid ion exchange with the ionic liquids are the two migration modes that synergistically increase the room temperature ionic conductivity of the SPE-IL. In addition, the abundant ester groups provide strong chemisorption on lithium polysulfides and successfully inhibit the sulfur shuttle. More importantly, ionic liquids realize the “soft contact” between the electrode and the electrolyte, which is conducive to the construction of stable interfaces. Together with the GPa-level high modulus brought by vinyl carbonate, the formation of lithium dendrites is inhibited. As a result, the assembled lithium-sulfur battery displayed a high initial discharge capacity of 1106 mA h g−1, good cycling stability (80.2% capacity retention after 300 cycles at 0.1 C) and superior rate performance.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Chemistry A

ISSN

2050-7488

e-ISSN

—

Svazek periodika

9

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

2459-2469

Kód UT WoS článku

000614172600048

EID výsledku v databázi Scopus

2-s2.0-85100381436