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Strontium (Sr)-doped perovskite oxide La1-xSrxMnO3 (x=0, 0.2, 0.6) composites are prepared by sol-gel process assisted with chelating effect of citric acid, which was used as catalysts for oxygen cathode in rechargeable lithium−air batteries. Sr-doped perovskite oxide La1-xSrxMnO3 composites demonstrate higher catalytic activities than that of the pure LaMnO3. In particular, the La0.4Sr0.6MnO3 had...
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