Half cell for flow cell, single cell, cell stack and flow cell system
A liquid flow battery and half-cell technology, applied in battery electrodes, fuel cells, regenerative fuel cells, etc., can solve problems such as increasing battery power density, increasing battery structure complexity, and side effects
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Embodiment 1
[0057] The single battery in this embodiment (such as figure 1 shown) includes a perfluorosulfonic acid diaphragm (4), and a positive electrode half cell and a negative electrode half cell respectively located on both sides of the perfluorosulfonic acid diaphragm (4). Among them, the positive (or negative) half-cell includes a plate (1, 10 mm thick, made of graphite, and the surface in contact with the electrode is a surface with a roughness level of N7) and an electrode (2, 8 mm thick, 200 mm in size. x 200mm, the material is graphite felt, the structure is as figure 2 As shown), one side of the electrode is engraved with an electrolyte flow channel (3, 1mm wide and 1mm deep Z-shaped flow channel with a square cross-section, the total area is 200mm x 200mm, and the structure is as follows image 3 shown), the side engraved with the electrolyte flow channel is in contact with the perfluorosulfonic acid diaphragm (4), and the other opposite side is embedded in the pole plate ...
Embodiment 2
[0060] The structure of the single cell in this embodiment is similar to that in Embodiment 1, except that the thickness of the electrode is 6 mm, and the thickness of the pole plate is 8 mm.
[0061] After testing, the contact resistance of the half-cell provided by this embodiment is 160mOhm, and the maximum power density of the single cell is 450mW·cm -2 . The single cell provided by this embodiment can meet the requirement of high power density work. Among them, the initial concentration of the positive electrolyte is 0.8mol L -1 V(IV)+0.8mol L -1 V(IV)+3mol·L -1 h 2 SO 4 , the negative electrode electrolyte concentration is 0.8mol L -1 V(II)+0.8mol·L -1 V(III)+3mol L -1 h 2 SO 4 .
Embodiment 3
[0063] The structure of the single cell in this embodiment is similar to that in Embodiment 1, except that the thickness of the electrode is 4 mm, and the thickness of the pole plate is 6 mm.
[0064] After testing, the contact resistance of the half-cell provided by this embodiment is 140mOhm, and the maximum power density of the single cell is 500mW·cm -2 . The single cell provided by this embodiment can meet the requirement of high power density work. Among them, the initial concentration of the positive electrolyte is 0.8mol L -1 V(IV)+0.8mol L -1 V(IV)+3mol·L -1 h 2 SO 4 , the negative electrode electrolyte concentration is 0.8mol L -1 V(II)+0.8mol·L -1 V(III)+3mol L -1 h 2 SO 4 .
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Abstract
Description
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Application Information
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