Interface-engineered MoS2/C nanosheet heterostructure arrays for ultra-stable sodium-ion batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F17%3A63517218" target="_blank" >RIV/70883521:28610/17:63517218 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.ces.2017.09.007" target="_blank" >http://dx.doi.org/10.1016/j.ces.2017.09.007</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ces.2017.09.007" target="_blank" >10.1016/j.ces.2017.09.007</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interface-engineered MoS2/C nanosheet heterostructure arrays for ultra-stable sodium-ion batteries

Popis výsledku v původním jazyce

Development of ultra-stable high capacity electrodes is imperative for the widespread commercialization of sodium-ion batteries. Herein, we employed a micro-area etching and surface functionalization strategy to synthesize two-dimensional (2D) MoS2/C nanosheets with a well-defined heterointerface vertically anchored on a carbon cloth. The large MoS2/C nanosheet heterointerface and a high interlayer distance (0.99 nm) not only facilitated Na+ intercalation but also improved the diffusion kinetics of Na+ in the 2D interlayer space. A modulation of the cut-off voltage yielded a high specific capacity of 433 mAh g−1 at 0.2 A g−1 and 232 mAh g−1 at 10 A g−1 within the potential range of 0.4–3.0 V. These values are much higher than that of pure MoS2 nanosheet arrays (162 mAh g−1 at 10 A g−1). More importantly, during the first 1500 cycles, the capacity was maintained at ∼320 mAh g−1 at 1 A g−1, while after 10000 cycles, it became approximately ∼271 mAh g−1 at 3 A g−1. These are the best values ever reported for MoS2-based anode materials for SIBs. Furthermore, after being assembled into a flexible battery, it withstand repeated bending for over 200 times without any obvious capacity loss. Hence, this material is a promising electrode for future flexible batteries.

Název v anglickém jazyce

Interface-engineered MoS2/C nanosheet heterostructure arrays for ultra-stable sodium-ion batteries

Popis výsledku anglicky

Development of ultra-stable high capacity electrodes is imperative for the widespread commercialization of sodium-ion batteries. Herein, we employed a micro-area etching and surface functionalization strategy to synthesize two-dimensional (2D) MoS2/C nanosheets with a well-defined heterointerface vertically anchored on a carbon cloth. The large MoS2/C nanosheet heterointerface and a high interlayer distance (0.99 nm) not only facilitated Na+ intercalation but also improved the diffusion kinetics of Na+ in the 2D interlayer space. A modulation of the cut-off voltage yielded a high specific capacity of 433 mAh g−1 at 0.2 A g−1 and 232 mAh g−1 at 10 A g−1 within the potential range of 0.4–3.0 V. These values are much higher than that of pure MoS2 nanosheet arrays (162 mAh g−1 at 10 A g−1). More importantly, during the first 1500 cycles, the capacity was maintained at ∼320 mAh g−1 at 1 A g−1, while after 10000 cycles, it became approximately ∼271 mAh g−1 at 3 A g−1. These are the best values ever reported for MoS2-based anode materials for SIBs. Furthermore, after being assembled into a flexible battery, it withstand repeated bending for over 200 times without any obvious capacity loss. Hence, this material is a promising electrode for future flexible batteries.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Chemical Engineering Science

ISSN

0009-2509

e-ISSN

—

Svazek periodika

174

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

104-111

Kód UT WoS článku

000413321000009

EID výsledku v databázi Scopus

2-s2.0-85029067498