Results 21 to 30 of about 1,399,368 (149)
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Lithium‐rich manganese‐based cathodes (LRM) deliver high discharge capacities beyond 250 mAh g−1, but their practical deployment is restricted by irreversible oxygen redox, structural reconstruction, sluggish kinetics and unstable cathode‐electrolyte interfaces (CEI). Here, we develop a colloid‐assisted anchoring‐diffusion engineering strategy
Jia‐Nan Hao +13 more
wiley +1 more source
Gaoya dianqi, 2013 极性反转是直流输电设备的一种特殊工作状态。笔者以三层电介质复合绝缘结构为研究对象,采用场路耦合方法,建立了介质极性反转的数学模型,分析了极性反转时各层电介质中的电场分布、电流特性,以及热生成率随时间变化的关系,最后还分析了不同介质交界面上电荷极性反转的特点。研究结果可为直流输电设备绝缘结构设计提供参考。
张启民, 张良县, 陈模生
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Photocatalytic hydrogen peroxide (H2O2) production from water and oxygen driven by solar energy represents a highly promising green and sustainable strategy. Herein, lignin‐derived carbon quantum dots (LCDs) were strategically introduced at the heterojunction between a Bi‐based metal organic framework (Bi‐MOF) and ZnIn2S4 (ZIS).
Wanpeng Sun +8 more
wiley +1 more source
Gongye shui chuli, 2015 采用硼掺杂金刚石(BDD)膜电极对氨氮废水进行处理,重点探讨了氨氮的氧化机理。结果表明:碱性条件下,氨氮在BDD电极上可直接氧化,其氧化率达6%。在氯离子存在条件下,氨氮氧化以间接氧化为主,氨氮去除率可达到87%,其中直接氧化率为8%,间接氧化率为79%,且在氧化过程中活性游离氯更易与氨氮发生反应,转化为N2或硝酸盐,而不是转化为氯酸盐或有害的高氯酸盐。
王春荣 +4 more
doaj +2 more sources
Gaoya dianqi, 2018 换流变压器是高压直流输电系统中的重要设备之一,运行过程中不仅要承受交流电压、直流电压和交直流电压叠加,还要承受极性反转电压的作用。为了考量换流变压器油纸等绝缘媒质的绝缘特性,首先,建立了瞬态电场的理论计算模型;其次,利用Ansys软件建立了换流变压器的三维瞬态电场计算模型;然后,考察了换流变压器油纸等绝缘结构在极性反转电压下的瞬态电场变化特性;最后,仿真分析了极性反转试验电压类型的不同对瞬态电场的影响。结果表明:油纸等绝缘结构在第一次极性反转过程中承受的瞬态电场值最大 ...
彭丽丹, 李琳, 张宁
doaj
Bidirectional Interfacial Chemical Regulation Enables Durable Aqueous Zn‐I2 Batteries
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Aqueous Zn‐I2 batteries hold great promise for large‐scale energy storage, yet their practical deployment is hindered by coupled interfacial instabilities at both electrodes, where Zn‐anode parasitic reactions and cathodic polyiodide shuttle mutually aggravate each other.
Zimian Jia +8 more
wiley +1 more source
极性反转试验中,±800kV换流变压器套管尾部的电场分布研究
Dianci bileiqi, 2009 ±800 kV换流变压器出线套管,是一个结构复杂的绝缘系统。在试验与运行中,套管要承受不同形式电压的作用。特别在直流极性反转的情况下,套管尾部结构复杂,电场十分集中,易发生油中闪络或击穿放电,严重威胁特高压换流变压器的安全运行。应用有限元法,仿真计算了±800 kV换流变压器出线套管尾部的电场分布,计算结果表明:在极性反转试验中,套管尾部电场分布不均匀,且不同时刻、套管尾部电场分布及各关键位置的场强变化呈现线性特性。进一步分析得知:在套管设计中,不仅要考虑正负极性反转试验电压下的稳态电场分布 ...
刘鹏 +4 more
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Non‐noble metal oxygen electrocatalysts are essential for low‐cost rechargeable metal‐air batteries and fuel cells, determining their energy conversion efficiency. However, such electrocatalysts are limited by inadequate bifunctional activity and stability toward the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).
Lixin Sun +14 more
wiley +1 more source
Dianci bileiqi, 2013 特高压换流变阀侧套管承受混合电压,电场分布十分复杂。采用ANSYS软件仿真分析了特高压换流变阀侧套管在极性反转下的电场分布情况。计算得到了主要介质达到直流稳态的时间常数和最大场强值以及沿伞群的电场分布。计算结果表明:直流稳态后反转的电场要高于极性反转试验中的电场。在介质的分界处,伞群电场有最大值。分析结果为换流变压器阀侧套管的极性反转试验以及设计制作提供了科学的依据。
杜清全 +5 more
doaj
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Magnesium hydride (MgH2) is a promising solid‐state hydrogen storage material due to its high gravimetric capacity and excellent reversibility. However, its practical application is hindered by high thermodynamic stability and sluggish reaction kinetics.
Xingyang Chen +6 more
wiley +1 more source