Results 11 to 20 of about 20,505 (219)
Rare Metals, EarlyView.ABSTRACT The poor Zn chemistry of Zn metal anode and sluggish reaction kinetics of cathodes at high mass loadings are two crucial issues for hindering the application of aqueous Zn‐ion batteries (AZIBs). Herein, the hierarchical porous N‐doped carbon fibers (HPNCFs) were proposed to simultaneously optimize the reversibility of Zn plating/stripping of ...
Song Yang +6 more
wiley +1 more source
Rare Metals, EarlyView.ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi +8 more
wiley +1 more source
The influence of the electrical boundary condition on domain structures and electrocaloric effect of PbTiO3 nanostructures [PDF]
, 2016 本文在基于金兹堡—朗道—德文希尔唯象理论的相场法理论下，应用有限差分方法及四阶龙格—库塔法数值求解，研究不同电学边界条件对铁电纳米点畴结构演化和热电温度效应的影响。本文所用的中间电学边界条件，可以用来表示表面电极与纳米点之间的黏合情况及电极对表面电荷的补偿情况，进而说明退极化电场和退极化电能对系统自由能的影响，不同以往的对退极化能进行权重处理，具有实际的物理意义。 当电学参数λ0为0时，中间电学边界可以退化为开路电学边界条件；当λ0趋向无穷大时，对应于短路电学边界条件，即表面电荷可充分补偿。λ0的值越大，
陈志英
core +1 more source
Rare Metals, EarlyView.ABSTRACT With the rapid development of the energy storage industry, aqueous zinc‐ion batteries (AZIBs) have attracted considerable attention in the field of energy storage because of their inherent advantages, thereby emerging as a promising research direction with significant potential.
Lingjiao Fu +8 more
wiley +1 more source
Gaoya dianqi, 2023 随着能源转型的深入，风光等可再生能源大规模替代传统能源发电并网，电力系统结构发生很大的变化，导致电网惯性变低、稳定性变弱。另外，风力发电功率的波动性将导致电力系统调度困难。因此，在风电并网系统中增加构网型储能系统，并给出构网型储能系统的控制策略，进而围绕风电并网的稳定性以及电压跌落故障，对构网型储能系统增加前后风电并网波形进行对比分析，验证了构网型储能系统可以大大提高风电并网的稳定性，并且对电压跌落故障有很好的抑制作用。
杨本星, 王伟, 杨明轩, 柳涛
doaj
Evolution of Domain Structures of Epitaxial Ferroelectric Film under Different Electrical Boundary Conditions [PDF]
, 2015 本文采用基于金茨堡—朗道—德文希尔唯象理论的相场法，研究二维铁电薄膜畴结构的演化，并采用有限差分方法数值求解相场方程。首次提出了中间电学边界条件及其两类参数，并研究三种电学边界条件（中间电学边界条件、开路电学边界条件及短路电学边界条件）下铁电薄膜的畴结构及铁电性能。 结果显示，开路电学边界条件和短路电学边界条件下，薄膜畴结构有明显的尺寸效应。开路电学边界条件下，薄膜厚度较小时出现水平单畴结构；在临界厚度14nm处发生了水平单畴结构向多漩涡畴结构的转变；随厚度进一步增加，为了降低去极化电场能 ...
吴登阳
core
Rare Metals, EarlyView.ABSTRACT Ni3S2 has emerged as a promising catalyst for the electrochemical oxidation of biomass‐derived 5‐hydroxymethylfurfural (HMF) to 2,5‐furandicarboxylic acid (FDCA), driven by its distinctive physicochemical properties. However, its practical catalytic efficiency is severely hindered by abundant electrochemically inactive surface sites and poor ...
Cheng‐Feng Yi +5 more
wiley +1 more source
Study on Measurement for Dielectric Property of Microwave Dielectric Resonator [PDF]
, 2016 微波介质陶瓷材料是近几十年发展起来的一种新型的功能电子陶瓷，主要用于微波频段电路中完成一种或多种功能的陶瓷材料，是制造微波介质谐振器和滤波器的关键材料，它具有高介电常数，低介电损耗，温度系数小等优良性能适用于制造多种微波元器件，能满足微波电路小型化，集成化，高可靠性，低成本的要求。在电子对抗，导航，通信，雷达，家用卫星直播电视接收器和移动电话中得到了广泛应用。 微波介质陶瓷材料是电介质材料的一种，具有电介质材料的基本性质。其介电性能可用介电常数ε_r^'，品质因数Q（或损耗角正切 ...
李学漪
core
Rare Metals, EarlyView.ABSTRACT Chlorination roasting has emerged as a promising pyrometallurgical strategy for the selective recovery of lithium from spent lithium‐ion batteries (LIBs). In this study, a natural roasting agent, seawater‐derived chlorides, was employed to selectively extract lithium from spent LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode. MgCl2·6H2O, a main component
Bei‐Lei Zhang +7 more
wiley +1 more source
Electronic structures and thermoelectric properties of several wide-band-gap semiconductors [PDF]
, 2016 由于化石能源的飞速消耗以及人类在应用化石能源过程中造成的环境污染，开发清洁可持续的新能源成为研究热点，热电作为新能源开发中的一员，在研究中遇到的主要问题是材料的热电转换效率难以提高。本文的主要工作是以第一性原理为基础，以SiC，GaN，ZnO等几种宽禁带半导体为对象，研究宽禁带半导体材料结构变化与其热电效率高低的关系。通过Quantumespresso和WIEN2k计算材料的电子结构，再用Boltztrap软件计算材料的热电性质，我们可以比较不同结构的同种化合物热电性质的变化情况，并找出定性的规律 ...
黄政
core