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电极材料LiNi0.5Mn1.5O4的晶面设计与调控及其对储锂性能影响的研究

批准号51602101 学科分类无机非金属能量存储材料 ( E021002 )
项目负责人陈占军 负责人职称讲师 依托单位湖南人文科技学院
资助金额20.00
万元
项目类别青年科学基金项目 研究期限2017 年 01 月 01 日 至
2019 年 12 月 31 日
中文主题词锂离子电池;LiNi0.5Mn1.5O4;晶面;高电压;正极材料
英文主题词Li-ion Battery;LiNi0.5Mn1.5O4;Lattice Planes;High Voltage;Cathode

摘要

中文摘要 针对包覆、掺杂和纳米化等传统方法在改善LiNi0.5Mn1.5O4(LNMO)材料电化学性能方面存在的不足,如难以有效地控制包覆效果、难以控制元素掺杂位置、纳米效应引起电极/电解液界面处副反应、电化学性能改善有限等,本项目拟从材料晶面的角度出发,合成系列不同暴露晶面的LNMO,研究反应条件对其晶面形成的影响,揭示暴露晶面的形成机理,构建LNMO的晶面可控合成体系。进一步,以系列不同暴露晶面的LNMO作为电极材料,研究晶面对其电化学性能的影响规律,阐明它们之间的内在关系,并构筑LNMO的电化学性能可控体系,为采用晶面优选的方法制备低成本、高能量密度、高功率密度、长循环寿命和优良加工性能的LNMO正极材料提供理论依据。
英文摘要 The electrochemistry properties of LiNi0.5Mn1.5O4(LNMO)materials synthesized by some synthetic routes, such as coating, doping and nanocrystallization, are hard to be enhanced obviously, because it is very difficult to control the coating results on the surface of materials, the target substitution sites for the doping element, the side reactions at the interfaces of electrode/electrolyte induced by nano effect. Here, we will synthesize a series of LNMO materials with different lattice planes. The effects of the reaction conditions on the formation of lattice planes will be investigated, and the formation mechanism for lattice planes will also be revealed. As a result, the synthetic methods for lattice planes of LNMO materials will be established. Furthermore, the LNMO materials will be used as electrodes for Li-ion intercalation, and their electrochemical properties will be studied in detail. At the same time, the effects of lattice planes of LNMO materials on the electrochemical properties will be explored and the relationship between the intrinsic performance and the electrochemistry properties will be illuminated. Therefore, I believe that the cells composed of LNMO materials with different lattice planes could exhibit large capacity, long-term cycling life, high energy and power density.
结题摘要

成果

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