DGIST Scholar: Development and analysis of ultra-thin ceramic-coated separator via sputtering process for lithium ion battery

Department of Energy Science and Engineering Theses Master

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Development and analysis of ultra-thin ceramic-coated separator via sputtering process for lithium ion battery

Title: Development and analysis of ultra-thin ceramic-coated separator via sputtering process for lithium ion battery

Description: "Lithium-ion battery" "Ultra-thin ceramic-coated separator" "Sputtering" "Binder-free"

Table Of Contents: Ⅰ. Introduction 1
1.1 Overview 1
Ⅱ. Ultra-thin ceramic-coated separators (CCSs) for high -energy -density lithium-ion batteries: analysis of Al2O3 nano particles penetrating into the separator pore 5
2.2 Experiment 7
2.2.1 Preparation and characterization of CCSs fabricated through the sputtering process 7
2.2.2 Depth profiling of the distribution of Al2O3 nano particles in the internal micropore structure of separators 8
2.2.3 Cell fabrication and electrochemical measurement 8
2.3 Results and discussion 10
2.3.1 Surface morphology and composition of ultra-thin binder-free ceramic-coated separators (UB-CCSs) 9
2.3.2 Sputtered nano Al2O3 particles distribution in internal micropore structure depending on porosity of separator using time-of-flight secondary ion mass spectroscopy 12
2.3.3 Properties comparison of high porosity UB-CCS and commercial slurry ceramic-coated separator 18
2.3.4 Electrochemical performance 20
Ⅲ. Conclusion 25
References 26
Summary (in Korea) 30