Novel catalytic effects of Mn3O4 for all vanadium redox flow batteries

Abstract

A new approach for enhancing the electrochemical performance of carbon felt electrodes by employing non-precious metal oxides is designed. The outstanding electro-catalytic activity and mechanical stability of Mn(3)O(4) are advantageous in facilitating the redox reaction of vanadium ions, leading to efficient operation of a vanadium redox flow battery.

Porous nanoarchitectures of spinel-type transition metal oxides for electrochemical energy storage systems

“…In these circumstances, the electrochemical energy storage systems (ESSs), such as lithium-ion batteries, [6][7][8][9][10] metal-air batteries, [11][12][13][14][15] electrochemical capacitors, [16][17][18][19][20] and redox flow batteries, [21][22][23][24][25] have attracted worldwide attention due to their promising energy storage capabilities (Fig. 1).…”

Synergistic Catalyst–Support Interactions in a Graphene–Mn3O4Electrocatalyst for Vanadium Redox Flow Batteries

“…18,26 A somewhat separate area of research focuses on the development of metal oxide electrocatalysts, such as Nb 2 O 5 , WO 3 , Mn 3 O 4, and TiO 2 , supported on high surface area carbons. [27][28][29] In particular, the promising electrocatalytic activity of Mn 3 O 4 supported on C felt electrodes has been clearly demonstrated by Kim 29 using cyclic 5 voltammetry but it has been pointed out that the durability of such catalysts in the acidic environment within VRFBs requires further exploration. 12 An emerging and promising trend in electrocatalyst development is the exploitation of synergistic interactions between the electrocatalyst and electrocatalyst support.…”

“…As shown in Figure S4 in the supporting information, the oxidation peak current, i p,ox increased with increasing υ, until the ratio of i p,ox, to the reduction peak current, although i p,ox /i p,red was < 1 and υ was not reported so it may be that the reduced species was stable on the timescale of that experiment. 29 Figure 5B were stable in acidic media at when cycled to high potentials. 56 In that case, the stability was attributed to the strong metal-Mn 3 O 4 interaction, which prevented loss of the electrocatalyst.…”

Cell architecture upswing based on catalyst coated membrane (CCM) for vanadium flow battery

“…The main objective is to introduce oxygenated functional groups onto the fiber surface, to increase the active sites and improve the hydrophilicity of the fiber in the electrolyte. In recent years, it is found that depositing electro-catalyst such as metals (Ir, Bi) [13,14], alloys (CuPt 3 ) [15] and mental oxides (Mn 3 O 4 ) [16] onto the fiber surface can greatly enhance the electrochemical performance of CF. However, the poor mechanical stability hampers their practical application [16].…”

“…In recent years, it is found that depositing electro-catalyst such as metals (Ir, Bi) [13,14], alloys (CuPt 3 ) [15] and mental oxides (Mn 3 O 4 ) [16] onto the fiber surface can greatly enhance the electrochemical performance of CF. However, the poor mechanical stability hampers their practical application [16]. Meanwhile, many novel carbon-based electro-catalysts with high activity are developed [17e19].…”