| 학회 | 한국재료학회 |
| 학술대회 | 2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 | 23권 2호 |
| 발표분야 | 14. 에너지 저장 및 하베스팅 특별심포지엄(Energy storage and harvesting special symposium) |
| 제목 | Analysis of Electrochemical Properties and Thermal Stability of All-Solid-State Lithium ion Batteries using NASICON Structured Solid Electrolyte |
| 초록 | Li-ion batteries (LIBs) are widely used as power sources for portable devices, and their applications are about to be extended to large-scale applications such as electric vehicles and electrical energy storage systems (ESS). For that reason, the safety problem related to liquid electrolyte in present LIBs have become more important as it becomes large scale. One of the possible candidate that can alleviate the safety issues of the secondary batteries are the all-solid-state lithium-ion batteries (ASLBs) which utilize the solid state electrolyte. When a battery is made using a solid electrolyte, it has the advantages of thermal stability and high energy density compared to a battery made using a liquid electrolyte. Therefore, many researchers are conducting various studies on ASLBs. Among various types of solid electrolyte candidates, we studied on NASICON-type structure solid electrolytes such as Li1+xAlxTi2–x(PO4)3 and Li1+x AlxGe2-x (PO4)3 due to its chemical stability to air and moisture. To investigate the electrochemical properties and thermal stability of all solid-state batteries using NASICON-type solid electrolytes, Analysis was performed on the composite cathode in which the cathode and the solid electrolyte were combined. In this work, we assembled the ASLBs coin-type cell with composite cathode and Li metal foil as counter electrode. The cycle performance and impedance characteristics of these cells were implemented. For the investigation of structure and oxidation state change with temperature difference in a composite cathode, ex-situ synchrotron based X-ray absorption spectroscopy (XAS) and in-situ Time-resolved X-ray diffraction (TR-XRD) analysis were performed. The details will be discussed at the meeting. |
| 저자 | 박재호, 정훈기, 정경윤 |
| 소속 | 한국과학기술(연) |
| 키워드 | all solid state lithium ion battery; solid electrolyte; cathode composite; NASICON |
