Results 41 to 50 of about 21,700 (194)

Securing Bangladesh's Nuclear Future: Is the Regulated Asset Base Model the Answer to Address Project Corruption?

open access: yesJournal of Critical Infrastructure Policy, Volume 7, Issue 1, Spring/Summer 2026.
ABSTRACT Bangladesh's goal of achieving high‐income status by 2041 requires dependable, low‐emission, and affordable energy. With near‐universal grid coverage and increasing demand, nuclear energy is a strategic asset for long‐term baseload supply. However, the existing financing model, typified by the country's most expensive $12.65 billion Rooppur ...
Hafiz Ahmed
wiley   +1 more source

油纸绝缘气隙模型局部放电特性试验研究

open access: yesGaoya dianqi, 2012
为了研究直流输电系统中换流变压器油纸绝缘的局部放电特性,设计构造了典型的油纸局部放电模型———气隙放电模型。针对同一模型分别施以交流电压、直流电压以及冲击衰减振荡电压,采用IEC 60270-2000推荐的脉冲电流法分别检测与分析该模型局部放电的不同特征参数。对比研究了在交流、直流及振荡冲击电压下油纸绝缘气隙放电模型的局部放电脉冲特征参量包括局部放电起始电压、熄灭电压、放电波形、放电水平、放电重复率等,对实现换流变压器的局部放电在线监测与绝缘状态综合评估有一定的指导意义。
徐春社   +3 more
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  

Gallium‐Doped α‐MnO2 Cathode for High‐Performance Aqueous Zinc‐Ion Batteries

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Rechargeable aqueous zinc‐ion batteries (ZIBs) have received significant attention because of their high safety and low cost. MnO2 as a cathode material hampers the application of ZIBs due to its structural instability and dissolution during the operation of the battery.
Wen‐yu Xu   +13 more
wiley   +1 more source

绝缘铜管母线接头处沿面局部放电特性研究

open access: yesGaoya dianqi, 2013
绝缘铜管母线是近年来电网中应用较为广泛的一种新型电力设备,其接头是该类设备易于出现故障的部位,笔者针对该种设备易于出现放电的接头处沿面放电进行了研究。在实验室构建了绝缘铜管母线接头处沿面放电模型,研究了放电点距离接地屏不同距离时的放电起始电压、放电谱图特征,结果表明,当放电点靠近接地屏时,放电起始电压低,放电幅值小,放电谱图正负半周呈现对称现象。研究结果为绝缘铜管母线接头处沿面放电的早期检测提供了试验基础。
张亮   +5 more
doaj  

Synthesis and Electrochemical Performance of Biochar/Sulfur Composites as Cathode Materials for Lithium-Sulfur Battery [PDF]

open access: yes, 2015
单质硫具有资源丰富、无毒、廉价等优势,能提供高达1675mAh/g的理论容量,以硫和金属锂构建的锂硫电池能量密度为2600Wh/kg。但由于硫及其放电产物导电性差,中间产物多硫化锂的溶解及体积膨胀等问题,导致电极的活性材料利用率低和循环性差,限制了其应用。通过碳材料的引入可以获得导电复合材料,抑制多硫化物的穿梭,从而实现硫正极材料的高效利用;从生物质衍生而来的生物碳更具有简单易得,价格低廉,便于规模化,环保,资源可再生等优点,因此本文为以生物碳材料为主线 ...
吴娇红
core  

Lithiophilic CoNiB Quantum Dots Embedded in N‐Doped Porous Carbon as Multifunctional Interlayer for Dendrite‐Free and Stable Lithium Metal Batteries

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Lithium metal batteries (LMBs) promise ultrahigh energy density, yet their advancement is impeded by dendritic lithium growth and unstable interfacial behavior. Herein, for the first time, we present novel lithiophilic CoNiB quantum dots embedded in nitrogen‐doped hollow carbon nanorods (CoNiB@NC) as a multifunctional interlayer on a ...
Yu Wu   +8 more
wiley   +1 more source

不同电极结构气液两相介质阻挡放电特性比较

open access: yesGaoya dianqi, 2017
文中以水作为工作溶液,空气作为工作气体,采用电压—电流波形测量、发光图像拍摄、发射光谱分析等手段诊断了网—板电极、管—板电极和刃—板电极结构气液两相介质阻挡放电(DBD)的放电特性,研究了外加电压幅值对这3种电极结构放电产生影响,进一步计算得到了放电功率、传输电荷、分子振动温度和分子转动温度等主要放电参量,研究了他们随外加电压变化的变化规律,并结合放电理论对不同电极结构下气液两相DBD的放电机制进行分析。结果表明,相同条件下网—板电极结构气液两相DBD放电最强,放电功率与传输电荷最大,放电电流可达140
孙晶晶   +4 more
doaj  

Optimization, Surface Coating and Pilot Research of Li-rich Mn-based Cathode Material for Li-ion Batteries [PDF]

open access: yes, 2015
由于层状富锂锰基正极材料xLi2MnO3•(1-x)LiMO2(M=Ni,Co,Mn等)的实际放电比容量高达250mAh/g,且同时具有热稳定性好、成本低以及对环境相对友好等优点,使得该材料成为高比能量锂离子电池正极材料研究的热点之一。然而,尽管富锂锰基材料的放电容量较高,由于其首次充电脱出的Li无法完全回嵌到材料晶格中,导致该材料首次不可逆容量损失较大。另外,富锂锰基材料由于充放电循环时材料结构的不可逆变化及电极/电解液界面膜改变等原因,材料容量和放电电压随循环进行衰退严重 ...
王伟立
core  

Hollow Porous Nitrogen‐Doped Carbon‐Confined FeP/Fe2P Nanoparticle‐Armored Catalyst for Efficient Oxygen Reduction Reaction in Aqueous/Flexible Zinc‐Air Batteries

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT The design of nanoparticles confined in hollow N‐doped carbon structures is crucial for improving the oxygen reduction reaction (ORR) kinetics, yet achieving this remains a significant challenge. In this work, hollow porous nitrogen‐doped carbon encapsulated FeP/Fe2P (H‐FeP/Fe2P) were successfully constructed via a templating method combined ...
Li‐Xia Wang   +8 more
wiley   +1 more source

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