摘要
锂电池材料与空气接触会迅速发生反应,导致原始形貌和性能发生改变,限制了其构效关系的进一步深入解析,是锂电池研究领域亟待解决的瓶颈问题。因此,需要设计一种隔绝空气条件下未氧化锂电池内部结构微观尺度上的原位表征方法。目前,传统的聚焦离子束(FIB)、扫描电子显微镜(SEM)、X射线能量色散谱(EDS)、电子背散射衍射(EBSD)和飞行时间二次离子质谱(TOF-SIMS)等技术的表征方法相对独立,一次性装样就完成上述全部测试的应用尚未见相关文献。利用70°预倾台,在常规扫描电子显微镜、X射线能量色散谱和电子背散射衍射技术的基础上,采用聚焦离子束与飞行时间二次离子质谱联用技术,建立了一个真空环境下一次性装样就可完成锂电池正极材料内部结构表征的方法,并验证了该方法的可行性。这种方法还可以推广至其他类似结构的材料研究中,具有广泛的应用范围和广阔的应用前景。
Lithium battery materials react rapidly when in contact with air,resulting in changes in the original morphology.This is a bottleneck problem that urgently needs to be solved in the field of lithium battery research.Therefore,it is necessary to design an in-situ comprehensive characterization method that can perform microscale characterization of its unoxidized internal structure under the condition of air isolation.At present,traditional characterization methods such as FIB processing,SEM,EDS,EBSD,and TOF-SIMS are relatively independent,and there have been no reports on the application of completing all tests in disposable sample installation.We have established a set of in-situ characterization methods using a 70°pre-tilt sample holder.Based on conventional SEM,EDS,and EBSD,combined with FIB and TOF-SIMS technology,all tests can be completed in a vacuum environment with a one-time sample installation.In addition,we take lithium battery cathode materials for example to verify the feasibility of this method.This method can also be applied to other materials with similar structures and has a wide range of applications and broad prospects.
作者
韩瑶
朱燕华
鲍中秋
张莹
何琳
HAN Yao;ZHU Yanhua;BAO Zhongqiu;ZHANG Ying;HE Lin(Instrumental Analysis Center,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《实验室研究与探索》
CAS
北大核心
2024年第5期24-27,67,共5页
Research and Exploration In Laboratory
基金
上海交通大学决策咨询课题(JCZXSJB2023-25)
上海交通大学分析测试中心实验技术研究课题(沪交分测[2018]8号)。
关键词
锂电池
原位表征方法
聚焦离子束
飞行时间二次离子质谱
lithium batteries
in-situ characterization methods
focus ion beam(FIB)
time of flight secondary ion mass spectrometry(TOF-SIMS)
