In:
Chemistry – A European Journal, Wiley, Vol. 27, No. 39 ( 2021-07-12), p. 10134-10141
Abstract:
Rational designing and constructing multiphase hybrid electrode materials is an effective method to compensate for the performance defects of the single component. Based on this strategy, Cu 2 Se hexagonal nanosheets@Co 3 Se 4 nanospheres mixed structures have been fabricated by a facile two‐step hydrothermal method. Under the synergistic effect of the high ionic conductivity of Cu 2 Se and the remarkable cycling stability of Co 3 Se 4 , Cu 2 Se@Co 3 Se 4 can exhibit outstanding electrochemical performance as a novel electrode material. The as‐prepared Cu 2 Se@Co 3 Se 4 electrode displays high specific capacitance of 1005 F g −1 at 1 A g −1 with enhanced rate capability (56 % capacitance retention at 10 A g −1 ), and ultralong lifespan (94.2 % after 10 000 cycles at 20 A g −1 ). An asymmetric supercapacitor is assembled applying the Cu 2 Se@Co 3 Se 4 as anode and graphene as cathode, which delivers a wide work potential window of 1.6 V, high energy density (30.9 Wh kg −1 at 0.74 kW kg −1 ), high power density (21.0 Wh kg −1 at 7.50 kW kg −1 ), and excellent cycling stability (85.8 % after 10 000 cycles at 10 A g −1 ).
Type of Medium:
Online Resource
ISSN:
0947-6539
,
1521-3765
DOI:
10.1002/chem.202100857
Language:
English
Publisher:
Wiley
Publication Date:
2021
detail.hit.zdb_id:
1478547-X
