In this work, comparative studies of particulate zinc anode materials for rechargeable zinc air batteries are introduced. This includes the development of functionalized anode materials by variation of the zinc morphology and by coating of zinc particles with silicates as well as bismuth oxide based oxides. Thus, degradations limiting lifetime of particulate zinc should be reduced. The aim is to achieve high active material utilization as well as increased cycle number as compared to zinc particles, which are state of the art. By use of variously electrochemical and material science methods, the influences of functionalized zinc powders on the degradation mechanism are presented and compared with zinc particles, which are generally applied in primary zinc air batteries. The anode materials are tested by complete discharge and charge cycles in order to clarify if rechargeability can be achieved after maximum utilization. On the basis of the results, the functionality of the various zinc morphologies and coatings are deduced and conclusions for zinc anodes with improved electrochemical performances are described.
|School:||Universitaet Bayreuth (Germany)|
|Source:||DAI-C 81/1(E), Dissertation Abstracts International|
|Keywords:||Electrochemistry, Zinc air batteries, Bismuth oxide|
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