Design and Synthesis of Novel Materials for Solar Desalination and Li-ion Battery Application
- 주제(키워드) Desalination , Conductive additive
- 주제(DDC) 621.042
- 발행기관 아주대학교 일반대학원
- 지도교수 조인선
- 발행년도 2025
- 학위수여년월 2025. 8
- 학위명 석사
- 학과 및 전공 일반대학원 에너지시스템학과
- 실제URI http://www.dcollection.net/handler/ajou/000000035082
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
The growing demand for sustainable energy and clean water has heightened the need for functional materials that are not only high performing but also environmentally friendly and cost effective. To address this challenge, this study focuses on the development of two novel material systems designed for solar desalination and lithium ion battery applications. Both materials were synthesized through simple, scalable, and energy efficient processes, solid-state synthesis and flame-assisted treatment offering practical alternatives to conventional high-cost fabrication methods. In the first part of the study, a new photothermal material was designed to efficiently convert solar energy into heat for water evaporation. This material exhibited broad spectrum light absorption and structural features advantageous for photothermal conversion. When applied to a polymer membrane, it demonstrated stable and consistent evaporation performance under simulated solar irradiation. Moreover, the membrane maintained its efficiency in both seawater and wastewater without performance degradation, showing excellent salt resistance and long-term durability. These results suggest its suitability for real-world interfacial solar steam generation (ISSG) systems, particularly in regions with limited access to energy and clean water. The second part of the study presents an upcycling approach that transforms industrial waste into high value battery materials. Recovered carbon black (rCB) from end-of-life tires was used as a precursor for conductive carbon composites. By introducing a nickel oxide catalyst and applying a flame synthesis process using liquefied petroleum gas, multi-walled carbon nanotubes (MWCNTs) were directly grown on the rCB surface. Unlike conventional chemical vapor deposition (CVD), this method offers advantages in terms of shorter processing time and lower cost. The resulting composite formed a highly interconnected carbon network, leading to significant improvements in both electrical conductivity and structural uniformity. These enhancements indicate the material’s potential as a conductive additive for lithium-ion battery electrodes. This thesis proposes a materials-based approach to addressing critical challenges in water and energy through the development of structurally optimized, high-performance materials.
more목차
Chapter 1. Unique Photothermal Material: Copper Phosphate (Cu3P2O8) with Broadband Visible-to-Near-Infrared Absorption Properties for Efficient Solar Steam Generation 1
1.1 Introduction 1
1.2 Experimental section 4
1.2.1 Materials 4
1.2.2 Synthesis of Cu3P2O8 (CuPO) and Ca3P2O8(CaPO) powders 4
1.2.3 Preparation of CuPO and CaPO coating slurries 5
1.2.4 Preparation of CuPO and CaPO photothermal membranes 5
1.2.5 Material characterization 5
1.2.6 Interfacial solar steam generation (ISSG) performance evaluation 6
1.3 Result and discussion 7
1.3.1 Crystal structure and morphology of the Cu3P2O8 (CuPO) powder 7
1.3.2 Surface defects analysis 12
1.3.3 Near-infrared (NIR) absorption and photon-to-heat conversion 14
1.3.4 Interfacial solar steam generation (ISSG) performance 20
1.4 Conclusion 33
Chapter 2. Conductive Additive for Li-ion Batteries 34
2.1 Introduction 34
2.2 Experimental 36
2.2.1 Materials 36
2.2.2 Preparation of carbon-based materials pellet 36
2.2.3 Preparation of 0.4M NiOx solution 37
2.2.4 Flame treatment of Ni-coated rCB pellet 37
2.3 Result and discussion 38
2.3.1 Synthesis the carbon composite via flame treatment 38
2.3.2 Structural and morphological characterization of the carbon composite 40
2.3.3 Electrical properties of the carbon composite 42
2.3 Conclusion 44
Reference 45
