Shape-Assisted 2D MOF/Graphene Derived Hybrids as Exceptional Lithium-Ion Battery Electrodes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F19%3A73595038" target="_blank" >RIV/61989592:15310/19:73595038 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201902539" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201902539</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adfm.201902539" target="_blank" >10.1002/adfm.201902539</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Shape-Assisted 2D MOF/Graphene Derived Hybrids as Exceptional Lithium-Ion Battery Electrodes

Popis výsledku v původním jazyce

Herein, a novel polymer-templated strategy is described to obtain 2D nickel-based MOF nanosheets using Ni(OH)(2), squaric acid, and polyvinylpyrrolidone (PVP), where PVP has a dual role as a structure-directing agent, as well as preventing agglomeration of the MOF nanosheets. Furthermore, a scalable method is developed to transform the 2D MOF sheets to Ni7S6/graphene nanosheet (GNS) heterobilayers by in situ sulfidation using thiourea as a sulfur source. The Ni7S6/GNS composite shows an excellent reversible capacity of 1010 mAh g(-1) at 0.12 A g(-1) with a Coulombic efficiency of 98% capacity retention. The electrochemical performance of the Ni7S6/GNS composite is superior not only to nickel sulfide/graphene-based composites but also to other metal disulfide-based composite electrodes. Moreover, the Ni7S6/GNS anode exhibits excellent cycle stability (approximate to 95% capacity retention after 2000 cycles). This outstanding electrochemical performance can be attributed to the synergistic effects of Ni7S6 and GNS, where GNS serves as a conducting matrix to support Ni7S6 nanosheets while Ni7S6 prevents restacking of GNS. This work opens up new opportunities in the design of novel functional heterostructures by hybridizing 2D MOF nanosheets with other 2D nanomaterials for electrochemical energy storage/conversion applications.

Název v anglickém jazyce

Shape-Assisted 2D MOF/Graphene Derived Hybrids as Exceptional Lithium-Ion Battery Electrodes

Popis výsledku anglicky

Herein, a novel polymer-templated strategy is described to obtain 2D nickel-based MOF nanosheets using Ni(OH)(2), squaric acid, and polyvinylpyrrolidone (PVP), where PVP has a dual role as a structure-directing agent, as well as preventing agglomeration of the MOF nanosheets. Furthermore, a scalable method is developed to transform the 2D MOF sheets to Ni7S6/graphene nanosheet (GNS) heterobilayers by in situ sulfidation using thiourea as a sulfur source. The Ni7S6/GNS composite shows an excellent reversible capacity of 1010 mAh g(-1) at 0.12 A g(-1) with a Coulombic efficiency of 98% capacity retention. The electrochemical performance of the Ni7S6/GNS composite is superior not only to nickel sulfide/graphene-based composites but also to other metal disulfide-based composite electrodes. Moreover, the Ni7S6/GNS anode exhibits excellent cycle stability (approximate to 95% capacity retention after 2000 cycles). This outstanding electrochemical performance can be attributed to the synergistic effects of Ni7S6 and GNS, where GNS serves as a conducting matrix to support Ni7S6 nanosheets while Ni7S6 prevents restacking of GNS. This work opens up new opportunities in the design of novel functional heterostructures by hybridizing 2D MOF nanosheets with other 2D nanomaterials for electrochemical energy storage/conversion applications.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Advanced Functional Materials

ISSN

1616-301X

e-ISSN

—

Svazek periodika

29

Číslo periodika v rámci svazku

38

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

11

Strana od-do

"1902539-1"-"1902539-11"

Kód UT WoS článku

000479344400001

EID výsledku v databázi Scopus

2-s2.0-85069926047