In situ electron microscopy of lithium electrodeposition behavior using electrochemical liquid flowing graphene chip실시간 액상 유동 그래핀 칩 전자현미경을 이용한 리튬 전착 거동 연구

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Recently, liquid phase in situ transmission electron microscopy (TEM) has gained significant interest as a tool for battery research. Among the factors that affect the accuracy of in situ obtained data, membrane and electrode materials are crucial for electrochemical experiments. At the current state of electrochemical liquid chip development, a relatively thick SiNx membrane hinders the achievement of high-resolution imaging. In addition, electrode materials utilized in liquid chips are not standard for Li batteries and tend to form an alloy with Li. To enhance the quality and apply a full spectrum of TEM capabilities on the study of liquid samples, the further development of in situ platforms, including integration of new membrane materials and electrochemically stable electrodes in demand. This research includes the fabrication of electrochemical liquid flowing graphene chip (ec-LFGC) and its application for in situ TEM observation of Li electrodeposition behavior. Ec-LFGC is comprised of graphene membrane and Cu working electrode, which is a current collector in Li-based batteries. Transparency of graphene to an electron beam enables high-resolution imaging, and the inertness of the Cu electrode to the Li battery system eliminates possible side reactions. Therefore, ec-LFGC has tremendous potential for battery research and allows drawing a fundamental understanding of the common issues of batteries, such as Li dendrite growth mechanism and solid electrolyte interface evolution.
Yuk, Jong Minresearcher육종민researcher
한국과학기술원 :신소재공학과,
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학위논문(석사) - 한국과학기술원 : 신소재공학과, 2021.8,[vi, 49 p. :]


Graphene liquid cells▼aIn situ electron microscopy▼aLithium electrodeposition▼aHigh resolution imaging▼aLiquid phase transmission electron microscopy▼aLithium ion battery; 그래핀 액상 셀▼a실시간 투과 전자 현미경▼a리튬 증착▼a고분해능 이미징▼a액상 투과 전자 현미경▼a리튬이온전지

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