TY - JOUR
T1 - Constructing Heterostructured Bimetallic Selenides on an N-Doped Carbon Nanoframework as Anodes for Ultrastable Na-Ion Batteries
AU - Huang, Fei
AU - Wang, Lei
AU - Qin, Decai
AU - Xu, Zhibin
AU - Jin, Meiqi
AU - Chen, Yu
AU - Zeng, Xianxiang
AU - Dai, Zhihui
N1 - Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/1/12
Y1 - 2022/1/12
N2 - Transition-metal selenides have been recognized as a class of promising anode materials for sodium-ion batteries (SIBs) on account of their high capacity. Nevertheless, the sluggish conversion kinetics and rapid capacity decay caused by insufficient conductivity and volume change restrain their applications. Herein, hollow heterostructured bimetallic selenides embedded in an N-doped carbon nanoframework (H-CoSe2/ZnSe@NC) were prepared via a facile template-engaged method. Benefiting from the rich defect at the phase boundary of the CoSe2/ZnSe heterostructure, pre-reserved cavity, and enhanced structure rigidity, the abovementioned issues are resolved at once, and the accelerated charge transportation kinetics traced by spectroscopy techniques and theoretical calculations certify the interface effect in the capacity release. In addition, ex situ X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy all confirm the high-reversible electrochemical conversion mechanism in H-CoSe2/ZnSe@NC. Together with a reasonable structural architecture and the highly reversible conversion reaction, H-CoSe2/ZnSe@NC displays a prominent rate capacity (244.8 mA h g-1 at 10 A g-1) as well as an ultralong lifespan (10,000 cycles at 10 A g-1), highlighting the significance of structure control in fabricating high-performance anodes for SIBs.
AB - Transition-metal selenides have been recognized as a class of promising anode materials for sodium-ion batteries (SIBs) on account of their high capacity. Nevertheless, the sluggish conversion kinetics and rapid capacity decay caused by insufficient conductivity and volume change restrain their applications. Herein, hollow heterostructured bimetallic selenides embedded in an N-doped carbon nanoframework (H-CoSe2/ZnSe@NC) were prepared via a facile template-engaged method. Benefiting from the rich defect at the phase boundary of the CoSe2/ZnSe heterostructure, pre-reserved cavity, and enhanced structure rigidity, the abovementioned issues are resolved at once, and the accelerated charge transportation kinetics traced by spectroscopy techniques and theoretical calculations certify the interface effect in the capacity release. In addition, ex situ X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy all confirm the high-reversible electrochemical conversion mechanism in H-CoSe2/ZnSe@NC. Together with a reasonable structural architecture and the highly reversible conversion reaction, H-CoSe2/ZnSe@NC displays a prominent rate capacity (244.8 mA h g-1 at 10 A g-1) as well as an ultralong lifespan (10,000 cycles at 10 A g-1), highlighting the significance of structure control in fabricating high-performance anodes for SIBs.
KW - anode
KW - bimetallic selenide
KW - cycle life
KW - heterostructure
KW - sodium-ion batteries
UR - http://www.scopus.com/inward/record.url?scp=85122731733&partnerID=8YFLogxK
U2 - 10.1021/acsami.1c21934
DO - 10.1021/acsami.1c21934
M3 - 文章
C2 - 34978409
AN - SCOPUS:85122731733
SN - 1944-8244
VL - 14
SP - 1222
EP - 1232
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 1
ER -