DGIST Scholar: Strategy for high performance Li-metal batteries: Uniformly redistributing external pressure with weakly solvating electrolytes

Department of Energy Science and Engineering Theses Master

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Strategy for high performance Li-metal batteries: Uniformly redistributing external pressure with weakly solvating electrolytes

Title: Strategy for high performance Li-metal batteries: Uniformly redistributing external pressure with weakly solvating electrolytes

Description: Anode swelling; Force distribution pad; solvation structure; Li metal anode; Pouch cells

Table Of Contents: List of Contents

Abstract i
List of contents · ii
List of figures · iii

Ⅰ. Introduction
1.1. Current LIB market trends and limitations· 1
1.2. Unique merits of Li-metal anodes (LMAs) 2
1.3. Challenges of lithium metal batteries (LMBs) 3
1.4. Conventional strategies for inhibiting Li dendrite formation 5
1.5. Approach Ⅰ: Applying “Uniform” stack pressure 6
1.6. Approach Ⅱ: Modification of electrolyte chemistry 7
1.7. Research Goals 9

Ⅱ. Experimental Method
2.1. Li metal pouch cells and pressure distribution 10
2.2. Pressure distribution patterns and quantification · 11
2.3. Electrochemical measurements and material characterization 12

Ⅲ. Results and discussion
3.1 Uniformly redistributing external pressure on pouch cell 14
3.2 Modification of electrolyte chemistry 26
3.3 Synergistic effects on Li metal batteries 33

IV. Concluding Remark · 35
References 37
Summary in Korean 42