In:
Advanced Materials, Wiley, Vol. 30, No. 21 ( 2018-05)
Kurzfassung:
Incorporation of N,S‐codoped nanotube‐like carbon (N,S‐NTC) can endow electrode materials with superior electrochemical properties owing to the unique nanoarchitecture and improved kinetics. Herein, α‐MnS nanoparticles (NPs) are in situ encapsulated into N,S‐NTC, preparing an advanced anode material (α‐MnS@N,S‐NTC) for lithium‐ion/sodium‐ion batteries (LIBs/SIBs). It is for the first time revealed that electrochemical α → β phase transition of MnS NPs during the 1st cycle effectively promotes Li‐storage properties, which is deduced by the studies of ex situ X‐ray diffraction/high‐resolution transmission electron microscopy and electrode kinetics. As a result, the optimized α‐MnS@N,S‐NTC electrode delivers a high Li‐storage capacity (1415 mA h g −1 at 50 mA g −1 ), excellent rate capability (430 mA h g −1 at 10 A g −1 ), and long‐term cycling stability (no obvious capacity decay over 5000 cycles at 1 A g −1 ) with retained morphology. In addition, the N,S‐NTC‐based encapsulation plays the key roles on enhancing the electrochemical properties due to its high conductivity and unique 1D nanoarchitecture with excellent protective effects to active MnS NPs. Furthermore, α‐MnS@N,S‐NTC also delivers high Na‐storage capacity (536 mA h g −1 at 50 mA g −1 ) without the occurrence of such α → β phase transition and excellent full‐cell performances as coupling with commercial LiFePO 4 and LiNi 0.6 Co 0.2 Mn 0.2 O 2 cathodes in LIBs as well as Na 3 V 2 (PO 4 ) 2 O 2 F cathode in SIBs.
Materialart:
Online-Ressource
ISSN:
0935-9648
,
1521-4095
DOI:
10.1002/adma.201706317
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2018
ZDB Id:
1474949-X
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