In:
European Journal of Inorganic Chemistry, Wiley, Vol. 27, No. 1 ( 2024-01-02)
Abstract:
The key to obtain supercapacitors with high energy density is rational design and synthesis of negative electrode materials. Herein, a new type of polyoxometalate‐based coordination polymer was prepared by one‐step hydrothermal method. Polymer 1 with honeycomb two‐dimensional network structure is beneficial to improve electrical conductivity and storage capacity because of its π‐π stacking interaction. Ti 3 C 2 T x , an MXene material with excellent electrical conductivity, was mixed with compound 1 , which has rich redox reactions. As expected, 1 @Ti 3 C 2 T x exhibited outstanding specific capacitance (768.7 F g −1 at 8 A g −1 ), which is superior to many materials. In addition, the hybrid material also showed good cycle stability (88.1 % capacity retention after 1000 cycles). This work provides an effective way to develop hybrid electrode materials based on polyoxometalate‐based coordination polymers as supercapacitors. In addition, using 1 @Ti 3 C 2 T x as the negative electrode material and celery leaf carbon paper as the positive electrode material, the asymmetric supercapacitor device is fabricated. When the power density is 629.7 W kg −1 , the energy density is 9.2 Wh kg −1 , which indicates that it has a good application prospect.
Type of Medium:
Online Resource
ISSN:
1434-1948
,
1099-0682
DOI:
10.1002/ejic.202300533
Language:
English
Publisher:
Wiley
Publication Date:
2024
detail.hit.zdb_id:
1475009-0
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