Investigating Structural Inhomogeneity of High Nickel Cathode Materials for Lithium Ion Batteries during High Rate Discharge
- 주제(키워드) Lithium Ion Batteries
- 발행기관 고려대학교 대학원
- 지도교수 변동진, 장원영
- 발행년도 2019
- 학위수여년월 2019. 2
- 유형 Text
- 학위구분 석사
- 학과 대학원 신소재공학과
- 원문페이지 62 p
- 실제URI http://www.dcollection.net/handler/korea/000000083357
- UCI I804:11009-000000083357
- DOI 10.23186/korea.000000083357.11009.0000899
- 본문언어 영어
- 제출원본 000045978736
초록/요약
A study on the structural stability of the cathode materials during electrochemical reactions, in particular, at high rates is extremely important in order to design and develop new electrode materials to meet the stringent requirement of both high energy and power densities for electric vehicles (EVs). In this study, structural inhomogeneity developed within a single LiNi0.835Co0.15Al0.015O2 (NCA83) particle during a fast discharging process are thoroughly investigated by the selected area electron diffraction (SAED) technique using a transmission electron microscope (TEM). Since these structural inhomogeneity should critically affect various characteristics of the cathode materials, the complete understanding of structural inhomogeneity within a single particle occurring during various electrochemical processes is of critical importance to the development of cathode materials with outstanding performance.
more목차
Chapter Ⅰ. Introduction 1
1.1 Lithium Ion Batteries 1
1.2 High Nickel Layered Cathode Materials 4
1.3 Transmission Electron Microscope Analysis 7
Chapter Ⅱ. Experimental 8
2.1 Electrode Preparation 8
2.2 Electrochemical Testing 8
2.3 Materials Characterization 9
Chapter Ⅲ. Results and Discussion 10
3.1 Structural Inhomogeneity 10
3.2 Inversion Phenomenon 42
Chapter Ⅳ. Conclusion 51
Chapter Ⅴ. Reference 52
