锂离子电池.ppt

Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,；,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,；,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,；,；,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,；,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,文献阅读一,文献阅读一,制备,机械化学法,将锰化合物与锂的化合物等进展机械研磨,This phase was prepared by a direct mechanochemical synthesisat room temperature starting from orthorhombic LiMnO2 andLi2O(2:1 molar ratio),文献阅读一,文献阅读一,表征,文献阅读一,表征,文献阅读一,表征,文献阅读一,表征,文献阅读一,表征,文献阅读一,表征,文献阅读一,表征,文献阅读一,表征,文献阅读一,表征,文献阅读一,表征,文献阅读一,表征,文献阅读一,表征,结论,we report on a new electrochemically activecompound with the composition of Li4Mn2O5,a rock-salt-type nanostructured material,which shows a dischargecapacity of 355 mAhg1,the electrochemical activity is due not only to the Mn3+/Mn4+and O2/O redox couples,but also to the Mn4+/Mn5+redox couple.,文献阅读一,阅读文献二,Si作为阳极资料遇到的困难,循环过程中体积变化,与电解液发生副反响,资料尺寸降为纳米级,体容量低,构造退化,固体电解液界面不稳定,研讨目的,阅读文献二,纳米构造的优缺陷,优点：延伸了Si的循环寿命,缺陷：更高的外表积,低的振实密度,高的粒子间电阻降低了电学性质,研讨目的,阅读文献二,研讨目的,文献阅读二,研讨目的,文献阅读二,石榴构造的优点：,纳米尺寸防止粒子破裂,好的内部孔隙空间,碳作为导电框架和电解液阻挠层,碳封装了整个二次离子，限制了SEI大量构成,高外表积和低的振实密度部分处理,研讨目的,阅读文献二,样品制备与表征,阅读文献二,样品制备与表征,阅读文献二,样品制备与表征,文献阅读二,样品制备与表征,the electrochemical activity is due not only to the Mn3+/Mn4+and O2/O redox couples,but also to the Mn4+/Mn5+redox couple.,Si作为阳极资料遇到的困难,高外表积和低的振实密度部分处理,a rock-salt-type nanostructured material,which shows a dischargecapacity of 355 mAhg1,将锰化合物与锂的化合物等进展机械研磨,we report on a new electrochemically activecompound with the composition of Li4Mn2O5,碳的框架构造作为导电层和电解液阻挠层以及良好的孔隙空间,Si作为阳极资料遇到的困难,高的粒子间电阻降低了电学性质,低的振实密度,Si作为阳极资料遇到的困难,This phase was prepared by a direct mechanochemical synthesisat room temperature starting from orthorhombic LiMnO2 andLi2O(2:1 molar ratio),Si作为阳极资料遇到的困难,阅读文献二,空隙间隙临界尺寸,阅读文献二,空隙间隙临界尺寸,高的粒子间电阻降低了电学性质,Si作为阳极资料遇到的困难,Si作为阳极资料遇到的困难,将锰化合物与锂的化合物等进展机械研磨,碳的框架构造作为导电层和电解液阻挠层以及良好的孔隙空间,高外表积和低的振实密度部分处理,This phase was prepared by a direct mechanochemical synthesisat room temperature starting from orthorhombic LiMnO2 andLi2O(2:1 molar ratio),the electrochemical activity is due not only to the Mn3+/Mn4+and O2/O redox couples,but also to the Mn4+/Mn5+redox couple.,优点：延伸了Si的循环寿命,This phase was prepared by a direct mechanochemical synthesisat room temperature starting from orthorhombic LiMnO2 andLi2O(2:1 molar ratio),薄的、稳定的、空间上限制的SEI添加了库仑效率，并改善了循环稳定性,a rock-salt-type nanostructured material,which shows a dischargecapacity of 355 mAhg1,the electrochemical activity is due not only to the Mn3+/Mn4+and O2/O redox couples,but also to the Mn4+/Mn5+redox couple.,Si作为阳极资料遇到的困难,the electrochemical activity is due not only to the Mn3+/Mn4+and O2/O redox couples,but also to the Mn4+/Mn5+redox couple.,阅读文献二,性能测试,结论,薄的、稳定的、空间上限制的SEI添加了库仑效率，并改善了循环稳定性,碳的框架构造作为导电层和电解液阻挠层以及良好的孔隙空间,Si以粉末方式存在，合成不涉及复杂的设备和过程,减少初始资料的本钱，增大库仑效率,文献阅读二,谢谢,