Title

DEVELOPMENT OF GREEN AND SUSTAINABLE MATERIALS-BASED NANOGENERATORS FOR ENERGY HARVESTING AND SELF-POWERED APPLICATIONS

Alternative Title

에너지 수확 및 자가 발전 응용을 위한 친환경 및 지속 가능한 소재 기반 나노 발전기 개발

DGIST Authors

Sahu Manisha ; Hoe Joon Kim ; Sanghoon Lee

Advisor

김회준

Co-Advisor(s)

Sanghoon Lee

Issued Date

2025

Awarded Date

2025-08-01

Type

Thesis

Description

Sustainable Nanogenerators, Triboelectric Nanogenerator (TENG), Piezoelectric Nanogenerator (PENG), Self-Powered Sensors, Energy Harvesting

Table Of Contents

CHAPTER I 1
Introduction 1
Background 1
Necessity of this research 2
Types of mechanical energy harvesters 3
Piezoelectric Nanogenerator 3
Piezoelectric Material and Applications 4
Triboelectric Nanogenerator 5
Origin and basics of the Triboelectric Effect 5
Working modes of TENG 7
Vertical contact-separation (C-S) mode 7
Lateral sliding (LS) mode 7
Single electrode (SE) mode 8
Freestanding triboelectric-layer (FT) mode 8
Research progress of TENG 9
Applications of TENG 10
Objective and Scope of the Thesis 11
CHAPTER II 15
Materials, methods, and measurement techniques 15
Chemical details 15
Synthesis methodology 16
Solid state reaction (SSR) 16
Ball milling 17
Solvent casting 17
Measurement techniques and specifications 18
X-ray diffraction (XRD) 18
Raman spectroscopy 18
UV-Visible Absorption Spectroscopy 19
Fourier Transform Infrared Spectroscopy (FTIR) 19
X-ray Photoelectron Spectroscopy (XPS) 19
Field Emission Scanning Electron Microscope (FESEM) 20
Energy Dispersive X-ray Spectroscopy (EDS) 20
Ferroelectric hysteresis tester (P-E loop) 20
X-ray Tomography 21
Thermal Gravimetric Analysis (TGA) 21
Atomic Force Microscope (AFM) 22
Impedance Analyzer 22
Device fabrication techniques 22
Piezoelectric nanogenerator (PNG) 23
Triboelectric nanogenerator (TENG) 23
Calculation of electrical parameters 23
Power density 24
Spontaneous polarization 24
TENG output 25
Internal Resistance 25
CHAPTER III 26
Piezoelectric Nanogenerator Based on Lead-Free Flexible PVDF-Barium Titanate Composite Films for Driving Low Power Electronics 26
Results and Discussion 27
CHAPTER IV 36
A Flexible PDMS/BNT-BKT Composite Film-Based Triboelectric Nanogenerator for Self-Powered Applications 36
Results and Discussion 37
CHAPTER V 45
Additive manufacturing-based recycling of laboratory waste into an energy-harvesting device for self-powered applications 45
Results and Discussion 47
CHAPTER VI 54
Waste textiles as a versatile triboelectric energy-harvesting platform for self-powered applications in sports and athletics 54
Results and Discussion 55
CHAPTER VII 65
Bio-waste composites for cost-effective self-powered breathing patterns monitoring: An insight into energy harvesting and storage properties 65
Results and Discussion 66
CHAPTER VIII 76
A Triboelectric Nanogenerator using Waste Rice-Straw for a self-powered sensor 76
Results and Discussion 78
Preparation of PLA, PCL, and PLA-Rice Straw Composite Films 78
Rice Straw Powder Preparation 78
PLA Film Fabrication 79
PLA-Rice Straw Composite Film Fabrication 79
PCL Film Fabrication 79
CHAPTER IX 89
Conclusion and Future Work 89
Key Contributions 89
Future work 92
Conclusion 93
REFERENCES 97
요 약 문 108
Appendix A: List of Publications 112
Appendix B: List of Awards 116
Appendix C: Cover Page 117

URI

https://scholar.dgist.ac.kr/handle/20.500.11750/59773
http://dgist.dcollection.net/common/orgView/200000891902

DOI

10.22677/THESIS.200000891902

Degree

Doctor

Department

Department of Robotics and Mechatronics Engineering

Publisher

DGIST

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