Regulation of Ion Flux and Electric Field Distribution via Cellulose- Nanofiber/Titanium Dioxide Interlayer for Stable Aqueous Zinc-Ion Batteries
- 주제(키워드) Interlayer , Cellulose nanofiber , ZiB , Max-well polarization
- 주제(DDC) 547
- 발행기관 아주대학교 일반대학원
- 지도교수 윤태광
- 발행년도 2026
- 학위수여년월 2026. 2
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000035849
- 본문언어 한국어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Uncontrolled zinc dendrite growth and interfacial side reactions in aqueous zinc-ion batteries (ZIBs) remain major obstacles to their long-term stability and practical application. In this study, a cellulose nanofiber (CNF) and TiO2 composite interlayer was fabricated through a simple vacuum-filtration process and introduced between the glass fiber (GF) separator and the Zn anode. The CNF layer exhibits a more uniform pore distribution and higher mechanical strength than the GF separator; hence, it promotes homogeneous ion flux and prevents dendrite penetration. TiO2 nanoparticles provide zincophilic sites that facilitate uniform Zn2+ deposition, and their improved hydrophilicity ensures uniform electrolyte permeation and homogenizes the ion flux across the electrode surface, thereby preventing uneven current distribution and dendrite formation. The synergistic effect of these components effectively inhibits dendrite growth and parasitic side reactions, thereby enhancing the stability and reversibility of the Zn anode. Consequently the symmetric cell exhibited prolonged cycling stability of 715 h at 10 mA cm−2 and 5 mAh cm−2. This simple and cost-effective strategy provides an effective approach for achieving highly stable interfacial chemistry and improving the long-term performance of ZIBs.
more목차
Chapter 1. Introduction 1
1.1 Research Background 1
1.2 Overview of Aqueous Zinc-Ion Batteries 1
1.3 Current Strategies for Zinc Anode Stabilization 2
1.4 Research Strategy and Material Design 3
1.5 Research Aims and Significance 4
Chapter 2. Experimental Section 5
2.1 Materials 5
2.2 CNF/TiO2 Interlayer synthesis 5
2.3 Characterizations 7
2.4 Electrochemical Measurements 7
Chapter 3. Results and Discussion 9
3.1. Structural and Surface Characterization of the CNF/TiO2 Interlayer 9
3.2. Optimization of Interlayer Composition 15
3.2.1 Optimization of CNF Content 15
3.2.2 Optimization of TiO2 Content 18
3.3 Confirmation of Side Reaction Suppression 22
3.4 Analysis of Ion Transport Properties and Deposition Mechanism 26
3.5 Analysis of Long-term Cycling Stability 33
Chapter 4. Conclusion 37
References 39
