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Articles by Wang Kan
Precious metal free tunable manganese oxides for sustainable anion exchange membrane fuel cells
Abstract Eliminating platinum group metals from cathode catalysts in low-temperature polymer electrolyte fuel cells is highly important for addressing the sustainability challenge fuel cell systems face. Here, we propose modifying the electronic structure of Li-intercalated layered Mn-oxide as a cathode catalyst to overcome the activity/stability tradeoff in anion exchange membrane fuel cells.
Synthesis of alumina ceramic meta-fibers with tensile super-plasticity
Abstract Ceramics are prized for exceptional strength, but their inherent brittleness has long been a fundamental bottleneck. Here, we report tensile plastic Al2O3 meta-fibers that achieve a combination of high tensile strength (1.94 GPa) and large plastic strain (10.01%), with micro-strain reaching 194%. This is enabled via a phase-regulation strategy that constructs high-purity unsaturated [AlO5] coordination with disordered oxygen lattices in Al2O3 fibers.
Intraplanar percolation and interplanar bridge enables layered matrix for high-performance negative electrode - Nature Communications
Abstract The rapid advancement of modern technologies has increasingly heightened the demand for rechargeable batteries that exhibit higher energy density, faster charging capabilities, and longer cycle life. However, current battery materials are unable to meet these requirements due to their inherent structural limitations. Therefore, it is essential to design a multifunctional battery material structure, including ample Li+ storage, rapid Li+ diffusion, and enhanced structural stability.
Nanoengineered aqueous-hydrotrope hybrid liquid electrolyte solutions for efficient zinc batteries across a wide temperature range - Nature Nanotechnology
Abstract Aqueous zinc metal batteries are ideal candidates for grid storage applications. However, their practical application is hindered by a narrow operating temperature range and a limited electrolyte electrochemical stability window, both of which can be attributed to the water activity. Here, to minimize water activity in the electrolyte solution, we introduce a nanoengineered approach in which the water molecules are confined within a hydrophilic–hydrophobic water solvation sheath.
Integrated rocksalt–polyanion cathodes with excess lithium and stabilized cycling - Nature Energy
Abstract Co- and Ni-free disordered rocksalt cathodes utilize oxygen redox to increase the energy density of lithium-ion batteries, but it is challenging to achieve good cycle life at high voltages >4.5 V (versus Li/Li+). Here we report a family of Li-excess Mn-rich cathodes that integrates rocksalt- and polyanion-type structures. Following design rules for cation filling and ordering, we demonstrate the bulk incorporation of polyanion groups into the rocksalt lattice.
Examination of the Expression Profile of Resistance Genes in Yuanjiang Common Wild Rice (Oryza rufipogon)
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Author Correction: Stabilization of layered lithium-rich manganese oxide for anion exchange membrane fuel cells and water electrolysers - Nature Catalysis
Correction to: Nature Catalysis https://doi.org/10.1038/s41929-024-01136-1, published online 12 April 2024. In the version of the article initially published, Jin-Ming Chen’s second affiliation (Present address: Department of Electrophysics, National Yang Ming Chiao Tung University (NYCU), Hsinchu, Taiwan) was missing and has now been added to the HTML and PDF versions of the article. About this article Zhong, X., Sui, L., Yang, M. et al.
Stabilization of layered lithium-rich manganese oxide for anion exchange membrane fuel cells and water electrolysers - Nature Catalysis
Abstract The design of materials that efficiently catalyse the electrochemical reaction of molecular oxygen to hydroxide ions is key to the development of electrochemical devices. Here we demonstrate an approach to control the orbital hybridization of 3d and 4d/5d metals to tune the adsorption strength and stabilize the catalytic sites in the platinum-free catalysts Li2Mn1−xRuxO3.
Promoting high-voltage stability through local lattice distortion of halide solid electrolytes - Nature Communications
Abstract Stable solid electrolytes are essential to high-safety and high-energy-density lithium batteries, especially for applications with high-voltage cathodes. In such conditions, solid electrolytes may experience severe oxidation, decomposition, and deactivation during charging at high voltages, leading to inadequate cycling performance and even cell failure.
Enhancing Ionic Transport and Structural Stability of Lithium‐Rich Layered Oxide Cathodes via Local Structure Regulation
Abstract Lithium-rich manganese-based layered oxides (LRM) have garnered considerable attention as cathode materials due to their superior performance. However, the inherent structural degradation and obstruction of ion transport during cycling lead to capacity and voltage decay, impeding their practical applications.
Lithiated Prussian blue analogues as positive electrode active materials for stable non-aqueous lithium-ion batteries - Nature Communications
Abstract Prussian blue analogues (PBAs) are appealing active materials for post-lithium electrochemical energy storage. However, PBAs are not generally suitable for non-aqueous Li-ion storage due to their instability upon prolonged cycling. Herein, we assess the feasibility of PBAs with various lithium content for non-aqueous Li-ion storage.
Layered-rocksalt intergrown cathode for high-capacity zero-strain battery operation
Abstract The dependence on lithium-ion batteries leads to a pressing demand for advanced cathode materials. We demonstrate a new concept of layered-rocksalt intergrown structure that harnesses the combined figures of merit from each phase, including high capacity of layered and rocksalt phases, good kinetics of layered oxide and structural advantage of rocksalt.
Beijing warming up for Winter Games
Editor's Note: With one year to go before the Beijing 2022 Winter Olympic Games, preparations for the Games have intensified. And with the COVID-19 pandemic still raging in many parts of the world and the global economy still struggling to recover, news of the Games is like a light at the end of the tunnel for many. What impact will the Beijing Winter Games have on people worldwide? Three experts share their views on the issue with China Daily's Wang Kan.
Beijing warming up for Winter Games
By Wang Kan | China Daily | Updated: 2021-02-04 07:35 SHI YU/CHINA DAILY Editor's Note: With one year to go before the Beijing 2022 Winter Olympic Games, preparations for the Games have intensified. And with the COVID-19 pandemic still raging in many parts of the world and the global economy still struggling to recover, news of the Games is like a light at the end of the tunnel for many. What impact will the Beijing Winter Games have on people worldwide?
Govt help vital to promoting digital reading
Editor's Note: The recently issued white paper on digital reading shows about 423 million Chinese read on average 12.4 digital books each last year. How does digital reading promote reading in general and influence people's reading habit? Two experts share their views on the issue with China Daily's Wang Kan. Excerpts follow: E-books becoming increasingly popular Reading usually refers to the experience of a person reading a book and the knowledge he or she derives from it.
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