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首页> 外文期刊>Surface and Interface Analysis: SIA: An International Journal Devoted to the Development and Application of Techniques for the Analysis of Surfaces, Interfaces and Thin Films >Dynamic measurements of Li depth profiles in a Li-ion battery system under charging condition by means of ERD and RBS techniques
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Dynamic measurements of Li depth profiles in a Li-ion battery system under charging condition by means of ERD and RBS techniques

机译：利用ERD和RBS技术动态测量锂离子电池系统在充电条件下的锂深度分布

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摘要

Depth profiles of Li in a Li-ion battery system of Au/LiCoO2/LATP/Pt (LATP:Li1+X+YAlYTi2-YGeXP3-XO12) have been in situ measured at several stages of charging by means of the elastic recoil detection (ERD) and Rutherford backscattering (RBS) techniques with 9MeV O4+ ion beam. The thicknesses of LiCoO2 and Au are estimated from the RBS spectrum for the as-received specimen to be 190 and 27nm, respectively. From the ERD spectrum, it is also found that there exists impurity hydrogen of similar to 5% in LiCoO2. Moreover, it is found from the ERD data analysis after the first charging of 0.48x10(16)e/cm(2) to Au electrode that the fractional concentration of Li in LiCoO2 at the interface with Au electrode steeply decreases to 0.8, recovers with depth toward the interface with LATP and attains at 1.3 above the original value. With increasing the amount of charge supplied, the slope in the Li composition from Au electrode to LATP increases gradually. The data on the charging is concluded to include the irradiation effects due to the incident O ions, since the data on a non-irradiated part of the specimen obtained after finish of the charging shows that Li is almost completely reduced from LiCoO2. The dynamics of Li composition in LiCoO2 as a function of charging supplied is discussed in connection with hydrogen impurity and irradiation effect of the incident O ions. Copyright (c) 2014 John Wiley & Sons, Ltd.
机译：已通过弹性反冲检测在充电的几个阶段现场测量了Au / LiCoO2 / LATP / Pt（LATP：Li1 + X + YAlYTi2-YGeXP3-XO12）锂离子电池系统中Li的深度分布（ ERD）和卢瑟福背散射（RBS）技术以及9MeV O4 +离子束。根据接收样品的RBS光谱估计LiCoO2和Au的厚度分别为190nm和27nm。从ERD光谱中，还发现LiCoO 2中存在类似于5％的杂质氢。此外，从0.48x10（16）e / cm（2）首次向Au电极充电后的ERD数据分析中发现，Li在与Au电极交界面处的LiCoO2中的Li的分数浓度陡然下降至0.8，随着朝向与LATP的界面的深度，并且比原始值高1.3。随着提供的电荷量的增加，Li组成中从Au电极到LATP的斜率逐渐增加。关于充电的数据被推断为包括由于入射的O离子引起的辐照效应，因为关于在充电结束后获得的样品的未辐照部分的数据表明Li几乎从LiCoO2中完全还原了。结合氢杂质和入射O离子的辐照效应，讨论了LiCoO2中Li组成随提供的电荷而变化的动力学。版权所有（c）2014 John Wiley＆Sons，Ltd.

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