求翻译：据筑波大学介绍，现有的放电性能最好的材料是橄榄石化合物，放电时间为9秒。但该化合物含有氧元素，会随着时间推移发生氧化并使质量大打折扣。而新材料并非氧化物，在30次的充电放电后没有发生质量恶化的情况。是什么意思？

According to the University of Tsukuba, the discharge performance of the best materials is olivine compounds, the discharge time of 9 seconds. However, the compound contains oxygen, the occurrence of oxidation over time and greatly reduced the quality. New materials are not oxides, did not occur in

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