A heterogeneous FeP-CoP electrocatalyst for expediting sulfur redox in high-specific-energy lithium-sulfur batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43922174" target="_blank" >RIV/60461373:22310/21:43922174 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0013468621015656" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013468621015656</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2021.139275" target="_blank" >10.1016/j.electacta.2021.139275</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A heterogeneous FeP-CoP electrocatalyst for expediting sulfur redox in high-specific-energy lithium-sulfur batteries

Popis výsledku v původním jazyce

Lithium-sulfur batteries (LSBs) with high theoretical energy density and low cost have become one of the competitive candidates for next-generation energy storage devices. Nevertheless, the shuttle effect of polysulfide leads to rapid capacity decay and hinders the practical application of LSBs. Herein, a composite of heterogeneous bimetallic phosphide and graphene oxide (FeP-CoP/GO) is devised as a high efficiency catalyst. FeP-CoP not only promotes the deposition of Li2S to improve the utilization of sulfur, but also offers adequate active sites for anchoring and catalyzing the transformation of polysulfide to restrain the shuttle effect. And GO plays a role of auxiliary enhancement because of its big specific surface area and good conductivity. Therefore, FeP-CoP/GO/S with 79 wt.% sulfur content exhibits a high discharge capacity of 773 mAh g(-1) at 0.5 C and displays favorable cycle stability of 481 mAh g(-1) after 300 cycles with high coulombic efficiency of 96.6%. Bimetal phosphides as the catalyst offer a new perspective for high-specific-energy Li-S batteries. (C) 2021 Elsevier Ltd. All rights reserved.

Název v anglickém jazyce

A heterogeneous FeP-CoP electrocatalyst for expediting sulfur redox in high-specific-energy lithium-sulfur batteries

Popis výsledku anglicky

Lithium-sulfur batteries (LSBs) with high theoretical energy density and low cost have become one of the competitive candidates for next-generation energy storage devices. Nevertheless, the shuttle effect of polysulfide leads to rapid capacity decay and hinders the practical application of LSBs. Herein, a composite of heterogeneous bimetallic phosphide and graphene oxide (FeP-CoP/GO) is devised as a high efficiency catalyst. FeP-CoP not only promotes the deposition of Li2S to improve the utilization of sulfur, but also offers adequate active sites for anchoring and catalyzing the transformation of polysulfide to restrain the shuttle effect. And GO plays a role of auxiliary enhancement because of its big specific surface area and good conductivity. Therefore, FeP-CoP/GO/S with 79 wt.% sulfur content exhibits a high discharge capacity of 773 mAh g(-1) at 0.5 C and displays favorable cycle stability of 481 mAh g(-1) after 300 cycles with high coulombic efficiency of 96.6%. Bimetal phosphides as the catalyst offer a new perspective for high-specific-energy Li-S batteries. (C) 2021 Elsevier Ltd. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

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

Electrochimica Acta

ISSN

0013-4686

e-ISSN

—

Svazek periodika

397

Číslo periodika v rámci svazku

20 November 2021

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000706846000007

EID výsledku v databázi Scopus

2-s2.0-85115754409