Positive electrode used for seawater dissolved oxygen battery and seawater dissolved oxygen battery employing same
A dissolved oxygen and positive electrode technology, applied in the field of electrochemistry, can solve the problems of low battery working current density, poor cathode material activity, low dissolved oxygen concentration, etc., and achieve high stability, simple manufacturing, and high energy effects
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Embodiment 1
[0059] This embodiment provides a seawater dissolved oxygen battery, the anode is a graphite plate that has undergone electrochemical oxidation treatment, and the anode is an AZ63 magnesium alloy (open circuit potential in seawater is -1.6V vs. SCE ), seawater is the electrolyte, and the dissolved oxygen in the seawater is the positive electrode reactant. The surface of the graphite plate after electrochemical oxidation treatment forms an active layer, which contains a large number of oxygen-containing active functional groups. These oxygen-containing active functional groups are carboxyl oxygen, Carbonyl oxygen and hydroxyl oxygen.
[0060] The above-mentioned electrochemical oxidation treated graphite plate is prepared according to the following steps:
[0061] The graphite plate is placed in a mixed aqueous solution of sulfuric acid, perchloric acid and phosphoric acid, and the electrode potential of the graphite plate is constant at 2.4V vsSCE , The graphite plate is subjected ...
Embodiment 2
[0066] This embodiment provides a seawater dissolved oxygen battery. The positive electrode is a carbon fiber felt that has been chemically oxidized, and the negative electrode is an AZ61 magnesium alloy (open circuit potential in seawater is -1.65V vs. SCE ), using seawater as the electrolyte and dissolved oxygen in the seawater as the positive electrode reactant. After chemical oxidation treatment, the surface of the carbon fiber felt forms an active layer, which contains a large number of oxygen-containing active functional groups and nitrogen-containing active functional groups. The active functional groups are carboxyl oxygen, carbonyl oxygen and hydroxyl oxygen, and the nitrogen-containing active functional groups are pyridine nitrogen, pyrrole nitrogen and quaternary ammonium nitrogen.
[0067] The carbon fiber felt after chemical oxidation treatment is prepared according to the following steps:
[0068] Soak the carbon fiber felt in a mixed aqueous solution of nitric acid an...
Embodiment 3
[0073] This embodiment provides a seawater dissolved oxygen battery, the positive electrode of which is an activated carbon fiber brush that has undergone vapor phase oxidation treatment, and the negative electrode is a magnesium alloy sacrificial anode with a manganese content of 0.5wt% to 1.3wt% (the open circuit potential in seawater is- 1.7V vs. SCE ), using seawater as the electrolyte, and the dissolved oxygen in the seawater as the positive electrode reactant. The activated carbon fiber brush after oxidation treatment forms an active layer on the surface, which contains a large number of nitrogen-containing active functional groups. These nitrogen-containing active functional groups are pyridine nitrogen , Pyrrole nitrogen and quaternary ammonium nitrogen.
[0074] The above-mentioned activated carbon fiber brush that has undergone vapor phase oxidation treatment is prepared according to the following steps:
[0075] The activated carbon fiber brush was immersed in an aque...
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