In:
Dalton Transactions, Royal Society of Chemistry (RSC), Vol. 52, No. 3 ( 2023), p. 710-720
Abstract:
Ti 3 C 2 T x -MXenes have extremely promising applications in electrochemistry, but the development of Ti 3 C 2 T x is limited due to severe self-stacking problem. Here, we introduced oxygen vacancy-enriched molybdenum trioxide (MoO 3− x ) with pseudocapacitive properties as the intercalator of Ti 3 C 2 T x and PEDOT with high electronic conductivity as the co-intercalator and conductive binder of Ti 3 C 2 T x to synthesize Ti 3 C 2 T x /MoO 3− x /PEDOT:PSS (TMP) free-standing films by vacuum-assisted filtration and H 2 SO 4 soaking. The tightly intercalated free-standing film structure can effectively improve the self-stacking phenomenon of Ti 3 C 2 T x , expose more active sites and facilitate electron/ion transport, thus making TMP show excellent electrochemical performance. The volumetric and gravimetric capacitance of optimized TMP-2 can reach 1898.5 F cm −3 and 523.0 F g −1 at 1 A g −1 with a rate performance of 90.5% at the current density from 1 A g −1 to 20 A g −1 , which is significantly better than those of MXene-based composites reported in the literature. The directly-assembled TMP-2//TMP-2 flexible solid-state supercapacitor displays high energy/power output performances (25.1 W h L −1 at 6383.1 W L −1 , 6.9 W h kg −1 at 1758.4 W kg −1 ) and there is no obvious change after 100 cycles at a bending angle of 180°. As a result, the tightly intercalated TMP-2 free-standing film with high volumetric/gravimetric capacitances is a promising material for flexible energy storage devices.
Type of Medium:
Online Resource
ISSN:
1477-9226
,
1477-9234
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
1472887-4
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