New Layered Triazine Framework/Exfoliated 2D Polymer with Superior Sodium-Storage Properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10386131" target="_blank" >RIV/00216208:11310/18:10386131 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1002/adma.201705401" target="_blank" >https://doi.org/10.1002/adma.201705401</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/adma.201705401" target="_blank" >10.1002/adma.201705401</a>

Jazyk výsledku

angličtina

Název v původním jazyce

New Layered Triazine Framework/Exfoliated 2D Polymer with Superior Sodium-Storage Properties

Popis výsledku v původním jazyce

The efficient synthesis of 2D polymers (2DPs) with tailorable structures and properties is highly desired but remains a considerable challenge. Here, the first solution synthesis of millimeter-size crystalline covalent triazine frameworks (CTFs) with a clear lamellar structure, which can be exfoliated into micrometer-size few-layer 2DP sheets via both micromechanical cleavage and liquid sonication, is reported. The obtained CTFs or 2DPs show a unique staggered AB stacking with a dominant pore size of approximate to 0.6 nm, which is different from the common eclipsed AA stacking in various covalent organic frameworks. The preference for AB stacking is due to the specific interaction of triflic acid with CTFs as revealed computationally. When explored as new polymeric anodes for sodium-ion batteries, both crystalline bulk CTF and exfoliated 2DP exhibit very high capacities (225 and 262 mA h g(-1) at 0.1 A g(-1), respectively), impressive rate capabilities (67 and 119 mA h g(-1) at 5.0 A g(-1), respectively), and excellent cycling stability (95% capacity retention after 1200 cycles) due to their robust conjugated porous structure, outperforming most organic/polymeric sodium-ion battery anodes ever reported.

Název v anglickém jazyce

New Layered Triazine Framework/Exfoliated 2D Polymer with Superior Sodium-Storage Properties

Popis výsledku anglicky

The efficient synthesis of 2D polymers (2DPs) with tailorable structures and properties is highly desired but remains a considerable challenge. Here, the first solution synthesis of millimeter-size crystalline covalent triazine frameworks (CTFs) with a clear lamellar structure, which can be exfoliated into micrometer-size few-layer 2DP sheets via both micromechanical cleavage and liquid sonication, is reported. The obtained CTFs or 2DPs show a unique staggered AB stacking with a dominant pore size of approximate to 0.6 nm, which is different from the common eclipsed AA stacking in various covalent organic frameworks. The preference for AB stacking is due to the specific interaction of triflic acid with CTFs as revealed computationally. When explored as new polymeric anodes for sodium-ion batteries, both crystalline bulk CTF and exfoliated 2DP exhibit very high capacities (225 and 262 mA h g(-1) at 0.1 A g(-1), respectively), impressive rate capabilities (67 and 119 mA h g(-1) at 5.0 A g(-1), respectively), and excellent cycling stability (95% capacity retention after 1200 cycles) due to their robust conjugated porous structure, outperforming most organic/polymeric sodium-ion battery anodes ever reported.

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

2018

Kód důvěrnosti údajů

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

Název periodika

Advanced Materials

ISSN

0935-9648

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

000427111300008

EID výsledku v databázi Scopus

2-s2.0-85040785961