DGIST Scholar: A bis(2-fluoroethyl) carbonate as a new electrolyte additive for enhancing the long-term cycle performance of Li-metal batteries

Department of Energy Science and Engineering Theses Master

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A bis(2-fluoroethyl) carbonate as a new electrolyte additive for enhancing the long-term cycle performance of Li-metal batteries

Title: A bis(2-fluoroethyl) carbonate as a new electrolyte additive for enhancing the long-term cycle performance of Li-metal batteries

Alternative Title: 신규 전해액 첨가제인 bis(2-fluoroethyl) carbonate 도입에 따른 리튬 금속 전지의 장기 사이클 특성 향상

Description: Bis(2-fluoroethyl) carbonate, Electrolyte additive, Li metal anode, Cycle performance, Li metal battery

Table Of Contents: Ⅰ. Introduction 1
1.1 Overview 1
Ⅱ. A bis(2-fluoroethyl) carbonate as a new electrolyte additive for enhancing the long-term cycle performance of Li-metal batteries 3
2.1 Introduction 3
2.2 Experiment 5
2.2.1 Synthesis of B-FEC 5
2.2.2 Characteristic of B-FEC 6
2.2.3 Preparation of electrode and electrolyte 6
2.2.4 Electrochemical measurements 6
2.2.5 Postmortem analysis 7
2.3 Results and discussion 7
2.3.1 Structural analysis of B-FEC 8
2.3.2 Molecular orbital energy levels of electrolyte components 8
2.3.3 Optimization of B-FEC amount 10
2.3.4 Electrochemical performance of B-FEC 12
2.3.5 Surface analysis of Li metal through XPS 17
2.3.6 SEM images of Li metal after cycling 18
2.4 Conclusion 20
References 21
Summary (in Korean) 24