High-Performance Supercapacitors Based on a Zwitterionic Network of Covalently Functionalized Graphene with Iron Tetraaminophthalocyanine

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F18%3A73587861" target="_blank" >RIV/61989592:15310/18:73587861 - isvavai.cz</a>

Výsledek na webu

<a href="https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.201801111" target="_blank" >https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.201801111</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adfm.201801111" target="_blank" >10.1002/adfm.201801111</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-Performance Supercapacitors Based on a Zwitterionic Network of Covalently Functionalized Graphene with Iron Tetraaminophthalocyanine

Popis výsledku v původním jazyce

Graphene derivatives are promising candidates as electrode materials in supercapacitor cells, therefore, functionalization strategies are pursued to improve their performance. A scalable approach is reported for preparing a covalently and homogenously functionalized graphene with iron tetraaminophthalocyanine (FePc-NH2) with a high degree of functionalization. This is achieved by exploiting fluorographene&apos;s reactivity with the diethyl bromomalonate, producing graphene-dicarboxylic acid after hydrolysis, which is conjugated with FePc-NH2. The material exhibits an ultrahigh gravimetric specific capacitance of 960 F g(-1) at 1 A g(-1) and zero losses upon charging-discharging cycling. The energy density of 59 Wh kg(-1) is eminent among supercapacitors operating in aqueous electrolytes with graphene-based electrode materials. This is attributed to the structural and functional synergy of the covalently bound components, giving rise to a zwitterionic surface with extensive - stacking, but not graphene restacking, all being very beneficial for charge and ionic transport. The safety of the proposed system, owing to the benign Na2SO4 aqueous electrolyte, the high capacitance, energy density, and potential of preparing the electrode material on a large-scale and at low cost make the reported strategy very attractive for development of supercapacitors based on the covalent attachment of suitable molecules onto graphene toward high-synergy hybrids.

Název v anglickém jazyce

High-Performance Supercapacitors Based on a Zwitterionic Network of Covalently Functionalized Graphene with Iron Tetraaminophthalocyanine

Popis výsledku anglicky

Graphene derivatives are promising candidates as electrode materials in supercapacitor cells, therefore, functionalization strategies are pursued to improve their performance. A scalable approach is reported for preparing a covalently and homogenously functionalized graphene with iron tetraaminophthalocyanine (FePc-NH2) with a high degree of functionalization. This is achieved by exploiting fluorographene&apos;s reactivity with the diethyl bromomalonate, producing graphene-dicarboxylic acid after hydrolysis, which is conjugated with FePc-NH2. The material exhibits an ultrahigh gravimetric specific capacitance of 960 F g(-1) at 1 A g(-1) and zero losses upon charging-discharging cycling. The energy density of 59 Wh kg(-1) is eminent among supercapacitors operating in aqueous electrolytes with graphene-based electrode materials. This is attributed to the structural and functional synergy of the covalently bound components, giving rise to a zwitterionic surface with extensive - stacking, but not graphene restacking, all being very beneficial for charge and ionic transport. The safety of the proposed system, owing to the benign Na2SO4 aqueous electrolyte, the high capacitance, energy density, and potential of preparing the electrode material on a large-scale and at low cost make the reported strategy very attractive for development of supercapacitors based on the covalent attachment of suitable molecules onto graphene toward high-synergy hybrids.

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

2018

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

28

Číslo periodika v rámci svazku

29

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

"1801111-1"-"1801111-9"

Kód UT WoS článku

000438708600013

EID výsledku v databázi Scopus

2-s2.0-85047516975