Seismological research in Yunnan Province, China, and its tectonic implication between the Xianshuihe-Xiaojiang fault system and the Red River fault zone

The tectonic crosscutting relationship between the two most tectonic important Xianshuihe-Xiaojiang fault system (XFS) and the Red River fault zone (RRF) is a key basic problem but it is controversial now. These obscure further leads to a hot argument about the geodynamic model of the southeast margin of the Tibetan Plateau. In order to answer whether the XFS has cut across the RRF and extended southwardly, multiple seismological methods, including seismic relocation, b-value analysis, seismic energy, density study, focal mechanism inversion, and regional stress field research, are applied in the Yunnan Province area, China, where the XFS and the RRF intersects with each other. The results comprehensively demonstrate that the southern segment of the XFS has not been affected by the RRF, and it has continued for a length after crossing the RRF, but the Dian Bien Phu fault zone should not be an extension fault of the XFS. Along the SW direction, starting from the middle segment of the XFS, and cutting across the Qujiang fault, Shiping-Jianshui fault zone, RRF, Ailaoshan fault zone, Wuliangshan fault zone, and the southern section of the Daluo fault, the belt should be treated as the eastern boundary of the clockwise rotational in geodynamics model of the Tibetan Plateau in this study area. Based on these conclusion above and previous recognitions, a new geodynamic evolution model is proposed

Innovative Approaches to Electrochemical Energy Storage: Advancements in Microelectrodes and Vanadium Oxide Cathodes

Electrochemical energy storage plays a vital role in facilitating the integration of renewable energy sources, improving the efficiency of portable electronic gadgets and electric vehicles. This thesis explores innovative advancements in electrochemical energy storage, focusing on two main areas: microelectrodes and vanadium oxide cathodes. The first chapter elaborates on the distinctive features and manufacturing techniques of microelectrode needles and arrays, highlighting their exceptional accuracy in tackling unresolved scientific questions in energy storage. By enabling ultrafast electrodeposition kinetics and localized electrochemical measurements, they provide critical insights into the behavior of various energy storage materials, demonstrating their potential to challenge the initial understanding of fundamental energy storage mechanism. Future opportunities in electrodeposition morphology, in situ characterization and high-throughput experimenting have been identified, to further advance microelectrode technology. The second chapter delves into the structural and electrochemical advantages of vanadium oxide cathodes for aqueous zinc ion batteries (AZIBs). These cathodes are pivotal due to their potential for high energy density and extended cycle life, addressing critical obstacles in existing energy storage systems. AZIBs, equipped with their ecologically sound aqueous electrolytes, present safer options compared to lithium-ion batteries (LIBs), rendering them appropriate for extensive energy storage purposes. The chapter discusses innovative strategies to overcome current constrains, including the development of laser-scribed VOx-rGO heterostructures that exhibits exceptional pseudocapacitive Zn²⁺ storage and remarkable electrochemical performance. This research not only improves the calendar life of AZIBs, but also paves the way for future progress in cathodic engineering, electrolyte chemistry, and large-scale implementation. By enhancing the efficiency and durability of energy storage systems, these research topics have significant implications for supporting the global transition to cleaner energy solutions