Ultrafine FeS2 nanocrystals/porous nitrogen-doped carbon hybrid nanospheres encapsulated in three-dimensional graphene for simultaneous efficient lithium and sodium ion storage

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10420699" target="_blank" >RIV/00216208:11310/19:10420699 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=i0yL9HPFM7" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=i0yL9HPFM7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c9ta10184e" target="_blank" >10.1039/c9ta10184e</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ultrafine FeS2 nanocrystals/porous nitrogen-doped carbon hybrid nanospheres encapsulated in three-dimensional graphene for simultaneous efficient lithium and sodium ion storage

Popis výsledku v původním jazyce

Exploring advanced electrode materials with simultaneous efficient lithium and sodium ion storage is highly desired but remains a considerable challenge mainly due to the significant difference of lithium and sodium ion sizes. Transition metal sulfides (TMSs) have shown great potential in lithium/sodium ion batteries (LIBs/SIBs), however, they still face the critical issues of poor electrical conductivity, sluggish ion diffusion, huge volume expansion and agglomeration of highly reactive nano-metal products. Herein, we deliberately design a multiple-scale nanostructured and flexible anode by a facile one-step sulfidation strategy, in which ultrafine metal sulfide nanocrystals are isolated and protected by porous nitrogen-doped carbon nanospheres (PNC) and then encapsulated into three-dimensional graphene microsheets (3DG). It can effectively eliminate the above issues of TMSs, which makes them a very promising candidate for both LIBs and SIBs for the first time. Thus, the resultant FeS2/PNC@3DG anode delivers ultrahigh reversible capacities (1208 mA h g(-1) for LIBs and 597 mA h g(-1) for SIBs at 0.2 A g(-1)), excellent rate capabilities (829 mA h g(-1) for LIBs and 316 mA h g(-1) for SIBs at 5 A g(-1)), and superior long-term cycling performance with a capacity retention of 94.2% for LIBs and 85.2% for SIBs, which has rarely been achieved in previously reported various anodes. Moreover, its highly efficient Li+/Na+ storage mechanisms are systematically investigated by reaction kinetics analysis and density functional theory calculations, which further provide important insights into the development of high-performance energy storage materials.

Název v anglickém jazyce

Ultrafine FeS2 nanocrystals/porous nitrogen-doped carbon hybrid nanospheres encapsulated in three-dimensional graphene for simultaneous efficient lithium and sodium ion storage

Popis výsledku anglicky

Exploring advanced electrode materials with simultaneous efficient lithium and sodium ion storage is highly desired but remains a considerable challenge mainly due to the significant difference of lithium and sodium ion sizes. Transition metal sulfides (TMSs) have shown great potential in lithium/sodium ion batteries (LIBs/SIBs), however, they still face the critical issues of poor electrical conductivity, sluggish ion diffusion, huge volume expansion and agglomeration of highly reactive nano-metal products. Herein, we deliberately design a multiple-scale nanostructured and flexible anode by a facile one-step sulfidation strategy, in which ultrafine metal sulfide nanocrystals are isolated and protected by porous nitrogen-doped carbon nanospheres (PNC) and then encapsulated into three-dimensional graphene microsheets (3DG). It can effectively eliminate the above issues of TMSs, which makes them a very promising candidate for both LIBs and SIBs for the first time. Thus, the resultant FeS2/PNC@3DG anode delivers ultrahigh reversible capacities (1208 mA h g(-1) for LIBs and 597 mA h g(-1) for SIBs at 0.2 A g(-1)), excellent rate capabilities (829 mA h g(-1) for LIBs and 316 mA h g(-1) for SIBs at 5 A g(-1)), and superior long-term cycling performance with a capacity retention of 94.2% for LIBs and 85.2% for SIBs, which has rarely been achieved in previously reported various anodes. Moreover, its highly efficient Li+/Na+ storage mechanisms are systematically investigated by reaction kinetics analysis and density functional theory calculations, which further provide important insights into the development of high-performance energy storage materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

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

7

Číslo periodika v rámci svazku

46

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

26342-26350

Kód UT WoS článku

000501213600013

EID výsledku v databázi Scopus

2-s2.0-85075828175