Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Ultrafine SnO2 in situ modified graphite felt derived from metal–organic framework as a superior electrode for vanadium redox flow battery
Ist Teil von
Rare metals, 2023-04, Vol.42 (4), p.1214-1226
Ort / Verlag
Beijing: Nonferrous Metals Society of China
Erscheinungsjahr
2023
Link zum Volltext
Quelle
SpringerLink
Beschreibungen/Notizen
Metal–organic framework (MOF) and its derivatives have low-cost, controllable structure, and good catalytic performance, which are often used in the electrochemical field. In this work, SnO
2
in situ modified graphite felt (SnO
2
/GF) is prepared by hydrothermal method then simple thermal treatment using Sn-based MOF (Sn-MOF) as precursor. SnO
2
is uniformly and firmly distributed on the GF surface rather than the common agglomeration and poor bonding of metal oxides on carbon-based electrodes, providing stable active centers for the VO
2+
/VO
2
+
and V
2+
/V
3+
redox reactions. At 250 mA·cm
−2
, the energy efficiency of the battery with SnO
2
/GF remains at 63.2%, while the blank one has failed. The former battery, at 100 mA·cm
−2
, has higher energy efficiency and good cycle stability (over 200 cycles). The battery performance of this study is better than that of most previous report in metal oxide-related work. This work obtains high-performance composite electrode by simple treatment of MOF, which provides a reference for the application of MOF in vanadium redox flow battery.
Graphical abstract