Development Of The Reserve Of Potassium Ferrate Batteries

A new type of alkaline battery composed of super-iron (K2FeO4) cathode and aluminium anode as a reserve battery was developed, the electrochemical properties of Al-K2FeO4 battery were studied.The discharging characters of ferrate material and its membrane adhesives conductive additive cathode component electrode molding technics and reserve performance was studied in this thesis. The main conclusions were as follows:l.The effect of PTFE in super-iron cathode composites was explored, K2FeO4 was mostly decomposed by adding PTFE. So PTFE wasn't fit for being additive in super-iron battery.2.Measured from Al-K2FeO4 batteries containing different membrane materials of soapnated cellulose acetate vinylon and plastic membrane, the discharge capacity of vinylon was better than others. Because of its characteristic and better penetrability, vinylon was suitable for being additive in super-iron battery.3.For characteristic of reserve battery, it was very important to search for a better fabricate of super-iron battery. Compared with the coated electrode, pressed electrode showed better discharge properties with higher operating potential.4.The cathode component contained various conductive additive, the amount of measured discharge caparity added graphite was higher than others. Cathode component proportion by weight of 30% showed better discharge properties compared with other ratios. The super-iron battery as reserve battery was primarily validated.5.By testing the discharge capacity of Al-K2FeO4 battery at different loads, respectively their discharge capacity was 116.0 90.5 44.5 32.8 25.7mAh/g correspondingly 500 200 120 75 400. The electrochemical properties of Al-K2FeO4 battery were studied by testing of their discharge capacity at different temperatures and alkaline concentration, the experimental results indicated that the discharge performance of Al-K2FeO4 battery was associated with temperature and concentration, the higher temperature and denser concentration ,then the better discharge performance. When the temperature was higher than 40 ℃, chemical erodibility of anode were obviously increased.6.By testing of Al-K2FeO4 battery and Zn-K2FeO4 discharge capacity at different loads,results indicated that Al-K2FeO4 battery had higher operating potential and higher capacity. This is because potential of Al electrode was higher than Zn electrode's.7.By testing of the performance of activation and discharge of Al-K2FeO4 battery at constant 750 load under the temperature of 16℃ and 32℃, separately their activating time was 76.6s and 17.5s. The discharge capacity of 16℃ was 67% higher than that of 32℃.8.1n the reserve time of 74 days, the discharge capacity of Al-K2FeO4 battery was indeclinable, Feasibility of the super-iron battery as reserve battery was testified...