采用SEM、FTIR检测手段研究石墨毡于550℃在空气中氧化后纤维表面形貌以及官能团含量的变化。结果表明:550℃氧化处理5 h的石墨毡,比表面积显著增大,表面的-COOH和-OH官能团数目增多。处理后的石墨毡组装成电池后,于60 m A/cm2充放电电...采用SEM、FTIR检测手段研究石墨毡于550℃在空气中氧化后纤维表面形貌以及官能团含量的变化。结果表明:550℃氧化处理5 h的石墨毡,比表面积显著增大,表面的-COOH和-OH官能团数目增多。处理后的石墨毡组装成电池后,于60 m A/cm2充放电电流密度下进行充放电测试,电池的性能明显提高,平均电流效率达到94.60%,平均电压效率达到85.36%,平均能量效率达到80.75%,多次充放电测试表明,循环性能稳定;I-V测试表明,电池的充放电内阻明显降低。展开更多
A model of Fe-flow in the life cycle of steel product was put forward and analyzed. Three important resource and environmental indicators for Fe-flow analysis,that is,steel scrap index,iron ore index and iron loss ind...A model of Fe-flow in the life cycle of steel product was put forward and analyzed. Three important resource and environmental indicators for Fe-flow analysis,that is,steel scrap index,iron ore index and iron loss index were derived from this model. Illustrative examples,demonstrating the influence of the variation of steel output on steel scrap index and iron ore index were given. Case studies for estimating the values of steel scrap index of Japan,China and USA in the period of 1988-1997 were carried out. It was clarified that the main reason of severe deficiency in steel scraps for China's steel industry was its continued rapid growth. The study of iron,copper,zinc and lead cycle in China was carried out successfully according to this model.展开更多
文摘采用SEM、FTIR检测手段研究石墨毡于550℃在空气中氧化后纤维表面形貌以及官能团含量的变化。结果表明:550℃氧化处理5 h的石墨毡,比表面积显著增大,表面的-COOH和-OH官能团数目增多。处理后的石墨毡组装成电池后,于60 m A/cm2充放电电流密度下进行充放电测试,电池的性能明显提高,平均电流效率达到94.60%,平均电压效率达到85.36%,平均能量效率达到80.75%,多次充放电测试表明,循环性能稳定;I-V测试表明,电池的充放电内阻明显降低。
基金The Fundamental Research Funds for the Central Universities(N09042018)
文摘A model of Fe-flow in the life cycle of steel product was put forward and analyzed. Three important resource and environmental indicators for Fe-flow analysis,that is,steel scrap index,iron ore index and iron loss index were derived from this model. Illustrative examples,demonstrating the influence of the variation of steel output on steel scrap index and iron ore index were given. Case studies for estimating the values of steel scrap index of Japan,China and USA in the period of 1988-1997 were carried out. It was clarified that the main reason of severe deficiency in steel scraps for China's steel industry was its continued rapid growth. The study of iron,copper,zinc and lead cycle in China was carried out successfully according to this model.
