다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

In this critical review, metal oxides-based materials for electrochemical supercapacitor (ES) electrodes are reviewed in detail together with a brief review of carbon materials and conducting polymers. Their advantages, disadvantages, and performance in ES electrodes are discussed through extensive analysis of the literature, and new trends in material development are also reviewed. Two important future research directions are indicated and summarized, based on results published in the literature: the development of composite and nanostructured ES materials to overcome the major challenge posed by the low energy density of ES (476 references).

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A review of electrode materials for electrochemical supercapacitors

Nanocrystals are fundamental to modern science and technology. Mastery over the shape of a nanocrystal enables control of its properties and enhancement of its usefulness for a given application. Our aim is to present a comprehensive review of current research activities that center on the shape-controlled synthesis of metal nanocrystals. We begin with a brief introduction to nucleation and growth within the context of metal nanocrystal synthesis, followed by a discussion of the possible shapes that a metal nanocrystal might take under different conditions. We then focus on a variety of experimental parameters that have been explored to manipulate the nucleation and growth of metal nanocrystals in solution-phase syntheses in an effort to generate specific shapes. We then elaborate on these approaches by selecting examples in which there is already reasonable understanding for the observed shape control or at least the protocols have proven to be reproducible and controllable. Finally, we highlight a number of applications that have been enabled and/or enhanced by the shape-controlled synthesis of metal nanocrystals. We conclude this article with personal perspectives on the directions toward which future research in this field might take.

Shape‐Controlled Synthesis of Metal Nanocrystals: Simple Chemistry Meets Complex Physics?

Graphene’s success has shown that it is possible to create stable, single and few-atom-thick layers of van der Waals materials, and also that these materials can exhibit fascinating and technologically useful properties. Here we review the state-of-the-art of 2D materials beyond graphene. Initially, we will outline the different chemical classes of 2D materials and discuss the various strategies to prepare single-layer, few-layer, and multilayer assembly materials in solution, on substrates, and on the wafer scale. Additionally, we present an experimental guide for identifying and characterizing single-layer-thick materials, as well as outlining emerging techniques that yield both local and global information. We describe the differences that occur in the electronic structure between the bulk and the single layer and discuss various methods of tuning their electronic properties by manipulating the surface. Finally, we highlight the properties and advantages of single-, few-, and many-layer 2D materials in...

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Progress, Challenges, and Opportunities in Two-Dimensional Materials Beyond Graphene

Rechargeable lithium-sulfur batteries.

Two low-lying isomeric states in 169Ta have been identified via 159Tb(16O,6nγ)169Ta reaction. Their half-lives are measured to be 28 ± 5 ns for the 9/2− level and 17 ± 4 ns for the 5/2− level by using the delayed γ-γ coincidence method. These two isomeric states are considered to be the bandheads with 9/2−[514] and 1/2−[541] configurations respectively.

Low-lying isomeric states in 169Ta

Eliminating Oxygen Releasing of Li-Rich Layered Cathodes by Tuning the Distribution of Superlattice Domain

The invention discloses a metal air battery, which comprises a monomer battery, an upper cover plate and a lower cover plate, wherein the upper cover plate is arranged on the top of the monomer battery; the lower cover plate is arranged at the bottom of the monomer battery; the monomer battery comprises a drainage plate, a cathode layer, an electrolyte container and an anode plate in sequential fixed connection; the cathode layer and the anode plate are respectively attached onto the two sides of the electrolyte container, and can be in contact with electrolyte in the electrolyte container; the drainage plate is attached to one side, backing to the electrolyte container, of the cathode layer; a liquid inlet is formed in the upper side of the upper cover plate; a liquid outlet is formed in the lower side of the lower cover plate; the electrolyte can enter the electrolyte container through the liquid inlet and can be discharged out from the electrolyte container through the liquid outlet. The metal air battery can effectively solve the problem of structure looseness of the metal air battery.

Zhaoping Liu

Papers

Low-lying isomeric states in 169Ta

Eliminating Oxygen Releasing of Li-Rich Layered Cathodes by Tuning the Distribution of Superlattice Domain

Metal air battery

Graphene Nanoscrolls with Confined Silicon Nanoparticles as a Durable Anode for Lithium‐Ion Batteries

Synthesis and electrochemical feature of a multiple-phases Li-rich nickel manganese oxides cathode material