Electronic Structure Engineering for Enhanced Additive Performance in Robust Sulfur Cathodes
[eng] The doctoral thesis was authored by PhD candidate Chen Huang at the Catalonia Institute for Energy research (IREC) between 2022 and 2025, with funding provided by the China Scholarship Council. The thesis primarily focuses on electron modulation engineering for optimizing active cathode host m...
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| Formato: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Recursos: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/222591 |
| Acesso em linha: | https://hdl.handle.net/2445/222591 http://hdl.handle.net/10803/694966 |
| Access Level: | acceso abierto |
| Palavra-chave: | Química física Anàlisi electroquímica Bateries elèctriques Electrocatàlisi Physical and theoretical chemistry Electrochemical analysis Electric batteries Electrocatalysis |
| Resumo: | [eng] The doctoral thesis was authored by PhD candidate Chen Huang at the Catalonia Institute for Energy research (IREC) between 2022 and 2025, with funding provided by the China Scholarship Council. The thesis primarily focuses on electron modulation engineering for optimizing active cathode host materials in high-performance metal-sulfur batteries (MSBs). Comprising eight main chapters, the paper begins with an overarching introduction to MSBs, highlighting the current challenges and the research efforts aimed at overcoming them. Chapter 2 outlines the objectives of the paper, while Chapter 3 details the experimental methods employed. Chapters 4 through 7 delve into the complexities of MSB, discussing in depth the various strategies devised to address common challenges. These strategies include: (i) Designing heterostructures and vacancies engineering (ii) Creating homologous heterogeneous structures (iii) Developing P-N heterogeneous engineering (iv) Preparing hollow structure (v) Introducing anion doping strategies. In Chapter 4, the thesis focuses on the synthesis of a ZnTe/CoTe2 composite material with vacancies and heterostructures. The incorporation of vacancies enhances the conductivity of the electrode material, while the designed heterostructure facilitates Li+ diffusion. In Chapter 5, the hollow homogeneous heterostructure NiS2/NiSe2@NC host material is employed in LSBs, promoting changes in the Ni3+ spin state. Chapter 6 focuses on the generation of Se vacancies and lattice distortion in Bi2Se3@C via introduction doping strategies. Finally, Chapter 7 explores a P-N heterojunction strategy through the synthesis of Co3O4-NC@C3N4 electrode materials, elucidating the electron transfer mechanism and the spin effect on Co3+. |
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