Results 111 to 120 of about 25,659 (229)

Sodiumation of Biomass‐Derived Quinones Enables High‐Rate and Long‐Life Cathodes for Sodium‐Ion Batteries

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Biomass‐derived quinones are promising green and sustainable cathode materials for sodium‐ion batteries (SIBs), yet their practical application is hindered by poor cycling stability due to dissolution in conventional electrolytes. Herein, we demonstrate that sodiumation is an effective strategy to enhance both rate capability and cycling ...
Xinyue Zhu   +4 more
wiley   +1 more source

Synthesis of Phosphrous and Nitrogen Containing Flame Retardant and Its Application in Halogen-free Flame Retardant PBT [PDF]

open access: yes, 2016
聚对苯二甲酸丁二醇酯(PBT)具有良好的力学性能和电性能且吸水率低,在较高温度下依然能保持其机械性能稳定,使其在汽车零部件、光纤电缆和电子电器中等领域得到广泛应用。但由于纯PBT存在阻燃性较差的缺点,燃烧过程中还存在熔融滴落,因此需要对其进行阻燃改性以满足更加严苛的应用要求。传统含卤素阻燃剂虽然效果好,可是被引燃后会产成有毒物质,使用范围受到限制。建立新型无卤、具有产业化潜力的PBT阻燃体系已成为科研工作者关注的研究热点之一。 本文以常见工业原料亚磷酸二乙酯、9,10-二氢-9-氧杂-10-磷杂菲-10-
林康彬
core  

A Stretchable Sandwich Composite Film With Ultra‐Broadband Electromagnetic Interference Shielding and High‐Performance Photothermal Conversion Capability

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT With the rapid growth demand for advanced integrated electronic systems, lightweight flexible electromagnetic interference (EMI) shielding films integrated with functional properties, such as excellent mechanical properties and self‐healing capability, are a research focus in high‐tech functional materials. Herein, a sandwich‐structured aramid
Dan Guo   +9 more
wiley   +1 more source

一种新型110 kV输电线路雷击闪络限制器的研制

open access: yesGaoya dianqi, 2017
针对输电线路传统防雷装置的局限性,研制了一种新型输电线路雷击闪络限制装置,有效地整合了传统线路避雷器及并联间隙的优势。以新型110 k V输电线路雷击闪络限制器为例,设计了产品相关技术参数及安装结构,通过理论分析和仿真计算,从防雷性能、电气性能、机械性能等方面论述了研制的可行性。理论计算结果表明,该装置的电气性能良好,满足绝缘配合及爬电距离要求;机械性能可靠,抗弯、抗拉能力显著。仿真结果表明,该装置钳位效果明显,能够显著提高杆塔的反击、绕击耐雷水平,可靠保护杆塔。
万帅   +4 more
doaj  

Fabrication and photovoltaic application of ZnO/ZnCdSe core/shell nanowires [PDF]

open access: yes, 2015
纳米结构材料由于其独特的光学特性和电学特性,在光伏器件领域获得广泛关注。其中,纳米结构氧化物半导体,如ZnO纳米线、TiO2纳米晶等,由于其成本低、稳定性好、工艺成熟等优点,更是被广泛运用于太阳能电池研究。然而,这些材料带隙较宽,不能有效吸收太阳光,直接用它们制备的电池效率较低。为了提高效率,人们主要利用带隙较窄的ZnSe、CdSe、ZnCdSe等材料组装到ZnO、TiO2上,以增加光吸收。相比于二元的敏化材料,三元化合物半导体具有可调的能带结构和带隙,有望制备出更高效的太阳能能电池。我们知道 ...
罗强
core  

Adaptive Crystallization of NiFe‐MIL‐55 Nanorods: Atomically Precise Shape Control and Dual‐Function Electrocatalytic Performance

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT NiFe‐based MIL‐55 metal‐organic frameworks (MOFs) face challenges in achieving atomically precise composition and reliable methods for uniform growth. This study addresses these challenges by applying a slow evaporation crystallization technique to crude colloidal MIL‐55 products from hydrothermal synthesis, resulting in highly uniform ...
H. R. Haris   +10 more
wiley   +1 more source

电能质量与供电可靠性关系分析

open access: yesGaoya dianqi, 2013
基于电能质量议题认识的逐步深入,笔者从定义、指标及其指标特征等角度分析了电能质量与供电可靠性之间的相互关系,提出电能质量问题是供电可靠性问题的进一步延伸的思想,并主张电能质量指标的评价应结合其特征借鉴电力可靠性指标的更多内容。
陈晟
doaj  

Synthesis and Modification of High-voltage Lithium Nickel Manganese Oxide Cathode Material for Lithium-ion Batteries [PDF]

open access: yes, 2014
随着锂离子电池的应用从手机、数码相机和笔记本电脑等电子仪器领域扩展至电动汽车、通信技术和移动存储设备等领域,人们对锂离子电池的性能,特别是对功率密度和工作电压,提出了越来越高的要求。锂离子电池工作电压和功率密度等性能,主要由正极材料决定。因此,发展高电压正极材料是发展高能量密度锂离子电池重要的研究方向之一。 LiMn2O4(LMO)具有低成本、低毒性和良好的安全性能等优点,被认为是一种理想的正极材料。然而LMO能量密度低,研究表明当向LMO掺杂一定量的镍形成镍锰酸锂LiNi0.5Mn1.5O4(LNMO)
王静
core  

Synergy of Built‐In Electric Field and Surface Reconstruction of Co–NiS/Ni3S2 Nanowires for Enhanced Bifunctional Activity and Anti‐Chlorine Corrosion in Seawater Electrolysis

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The development of efficient and stable bifunctional electrocatalysts is a key challenge for the industrialization of hydrogen production by water electrolysis. In this work, Co‐doped NiS/Ni3S2 heterostructured nanowire arrays (Co–NiS/Ni3S2 NA) were successfully constructed by precisely modulating the phase‐selective behavior of nickel ...
Xing‐Hang Liu   +2 more
wiley   +1 more source

温度对MOA电阻片主要电气性能的影响

open access: yesDianci bileiqi, 2002
对 MOA电阻片在不同温度下几项主要电气特性试验结果进行了分析 ,阐述了温度对电阻片主要电气特性的影响 ,给出了详细的性能参数随温度的变化曲线 ,使人们对国产电阻片的温度特性有一个较全面的了解和掌握 ,以采取有效的措施大幅度地改善电阻片的固有温度特性 ,提高电阻片的综合电气性能 ,减少高压、超高压 MOA的损坏事故率 ,发展高性能特高压 MOA,提高 ...
郭洁, 朱跃
doaj  

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