20xx電子類畢業(yè)論文精選(已改無錯(cuò)字)
2025-03-26 02 本頁面
【正文】 摻雜后的樣品的放電平臺(tái)平坦， V左右，且放電平臺(tái)范圍較寬，初次放電容量較大。錫元素的引入提高了尖晶石型鋰鈦氧化物的容量，當(dāng)摻雜量過大時(shí)，材料的容量反而有所降低。錫、鉻二元摻雜：各個(gè)樣品均存在明顯的放電平臺(tái)， V之間，說明在整個(gè)放電電壓范圍無相變發(fā)生。隨著摻雜量的增加，電池的放電電壓平臺(tái)有所降低，容量較未摻雜的樣品均有所提高。錫、鉻二元摻雜在降低鋰鈦復(fù)合氧化物工作電壓的同時(shí)提高了其循環(huán)功能，是一種可以深化研究的改性方法。【英文摘要】 Lithium ion battery is a new generation green nonpollution battery which was introduced into the market in the 1990s. It is widely used in portable electron apparatus and cars due to its highlights, such as high voltage, low selfdischarge rate, pass size, light weight and nonmemory effect. The anode materials for lithium ionbatteries are the key to constrain its whole performance. The lithium ion batteries generally use carbon/graphite as the anode material. But when the battery discharged for the first time, there is passivation film formed on the surface of carbon, which will cause capacity loss. Moreover, the potential ofcarbon material is very close to that of lithium, whenovercharged, the metal lithium will be separated out on the surface of carbon, which is the intrinsic safety problem. While Lilt。sub4lt。/subTilt。sub5lt。/subOlt。sub12lt。/sub, when used as anode material for Liion battery, there is no such concerns, and there is almost no structure change during thecharge/discharge process, that is why there is so small irreversible capacity loss. The potential ofLilt。sub4lt。/subTilt。sub5lt。/subOlt。sub12lt。/sub is V （vs. Li/Lilt。sup+lt。/sup）, when bined with 4 V cathode materials such as LiCoOlt。sub2lt。/sub, LiNiOlt。sub2lt。/sub orLiMnlt。sub2lt。/subOlt。sub4lt。/sub, the materialLilt。sub4lt。/subTilt。sub5lt。/subOlt。sub12lt。/sub can construct a V cell. So it attracts many researchers’ lithium titanate posites were synthesized by high temperature solidstate method and doped monobasicly anddibasicly, and then the influences to the samples as the anode materials for lithium ion battery were studied with different doping ratio and doping elements. According to the ion d
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