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磷酸锰铁锂正极材料离子掺杂改性的进展 被引量:2
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作者 黄文莺 张贤碧 +3 位作者 乐文峰 孟秀艳 张旗 唐有根 《电池》 北大核心 2025年第1期2-10,共9页
磷酸锰铁锂(LiMn_(x)Fe_(1-x)PO_(4),0<x<1,LMFP)作为可替代LiFePO_(4)(LFP)的正极材料,兼具LFP稳定、廉价、环保以及LiMnPO_(4)(LMP)工作电压高[4.1 V(vs.Li^(+)/Li)]、能量密度高的优点,商用前景广阔。电子/离子电导率低问题和M... 磷酸锰铁锂(LiMn_(x)Fe_(1-x)PO_(4),0<x<1,LMFP)作为可替代LiFePO_(4)(LFP)的正极材料,兼具LFP稳定、廉价、环保以及LiMnPO_(4)(LMP)工作电压高[4.1 V(vs.Li^(+)/Li)]、能量密度高的优点,商用前景广阔。电子/离子电导率低问题和Mn^(3+)的Jahn-Teller效应导致的结构不稳定等问题,制约了LMFP的实际应用。综述近年来LMFP材料的离子掺杂改性研究进展,从晶体结构角度分析LMFP性能不足的本质原因;进而总结Li位、Mn/Fe位、PO_(4)位及多位点掺杂的研究策略及作用机理;重点阐述不同掺杂策略如何通过调控晶体结构、优化电子/离子传输路径和抑制Jahn-Teller效应来提升LMFP的倍率性能和循环稳定性;最后,对LMFP掺杂改性研究中存在的问题和未来发展方向进行展望。 展开更多
关键词 锂离子电池 正极材料 磷酸锰铁锂 离子掺杂 改性
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Application of the Mobile Multimedia in the School Student Management
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作者 meng xiuyan 《International English Education Research》 2019年第3期46-48,共3页
Under the new situation, the information management has gradually become the focus of the school management. With the increase of the students in schools, the burden of the student management becomes heavier. To this ... Under the new situation, the information management has gradually become the focus of the school management. With the increase of the students in schools, the burden of the student management becomes heavier. To this end, strengthening the design and research of the school management system and improving the efficiency of the student management have become the focus of the school development. At present, with the development of the big data technology, the management of college students also needs the corresponding changes. Based on the student management, this paper analyzes the current situation and the existing problems of the student information management, and expounds the principles and effective ways of developing the student management information construction, which can effectively promote the modernization of the student management. 展开更多
关键词 MOBILE MULTIMEDIA SCHOOL STUDENT management APPLICATION analysis INFORMATION technology
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