Title

Harvesting Waste Thermal Energy : Investigation of New Electrolyte SysteMaster for Thermoelectrochemical cell

DGIST Authors

Lee, Hochun ; Kim, Kyunggu ; Song, Hyun-Kon

Advisor

이호춘

Co-Advisor(s)

Hyun-Kon Song

Issued Date

2019

Awarded Date

2019-08

Citation

Kyunggu Kim. (2019). Harvesting Waste Thermal Energy : Investigation of New Electrolyte SysteMaster for Thermoelectrochemical cell. doi: 10.22677/thesis.200000219508

Type

Thesis

Description

Solvation; Seebeck; waste heat; Fe2+/3+ and Li+/Li redox reaction; Theroelectrochemical cell; Entropy

Table Of Contents

Ⅰ. INTRODUCTION 1
1.1 Harvesting waste heat 1
1.2 Thermoelectrochemical cell 2
1.3 N-type thermoelectrochemical cells of Fe(III)/(II) perchlorate redox couples for unprecedented high areal power density 3
1.4 Non-aqueous TEC based on Li+/Li redox couples and glymes 4
Ⅱ. THEORY 7
2.1 Thermoelectrochemistry 7
2.2 Internal resistance 8
2.3 Raman spectroscopy 9
2.4 Dielectric relaxation spectroscopy (DRS) 10
2.4 References 13
Ⅲ. N-type thermoelectrochemical cells of Fe (III)/(II) perchlorate redox couples for unprecedented high areal power density 14
3.1 Introduction 14
3.2 Experimental 18
3.2.1 Materials 18
3.2.2 Electrochemical measurements 18
3.2.3 Spectroscopy and thermal conductivity measurements 20
3.3 Results and discussion 21
3.3.1 Effect of counter anion and electrolyte composition 21
3.3.2 Relationship between the Se value and hydration structures of the Fe-species 34
3.3.3 Internal resistance analysis 42
3.3.4 Long-term performance and in-series connection tests 52
3.4 Conclusions 57
3.5 References 58
Ⅳ. Thermoelectrochemical cells based on Li+/Li redox couples in LiFSI glyme electrolytes 60
4.1 Introduction 60
4.2 Experimental 64
4.3 Results and discussion 66
4.3.1 Effects of the solvent nature and the salt concentration 66
4.3.2 Correlation between Seebeck coefficient and Li-solvation number 73
4.3.3 Internal resistance analysis 78
4.3.4 Low temperature performance 84
4.4 Conclusions 86
4.5 References 87
Ⅴ. Non-aqueous Li+/Li redox couples for thermoelectrochemical cells with wide temperature range 91
5.1 Introduction 91
5.2 Experimental 95
5.3 Results and discussion 97
5.3.1 Effects of salt concentration and operating temperature 97
5.3.2 Internal resistance analysis 104
5.3.3 The performance at wide temperature range 110
5.4 Conclusions 112
5.5 References 113
Summary (in Korean) 116

URI

http://dgist.dcollection.net/common/orgView/200000219508
http://hdl.handle.net/20.500.11750/10468

DOI

10.22677/thesis.200000219508

Degree

Doctor

Department

Department of Energy Science and Engineering

Publisher

DGIST

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