提高S校正电容器耐电流能力的探讨

制约Ｓ校正电容器耐电流能力的主要因素是ｔｇδ。ｔｇδ愈小，耐电流能力愈强。通过改进Ｓ校正电容器的设计与工艺，并在生产中控制ｔｇδ的上限值，将ｔｇδ较大的产品剔除，从而保证了电容器的耐电流能力。     

提高超小型铝电解电容器生产一次合格率

恰当选择原材料、确保铆接工序质量、重视工作电解液的配比、严控各工序成品率是提高超小型铝电解电容器投入产出一次合格率的关键。以１０Ｖ－４７μＦ（４ｍｍ×７ｍｍ）产品为例，投入产出一次合格率达９４％以上。     

片式铝电解电容器的设计与工艺探讨

铝电解电容器的片式化关系着ＳＭＴ技术的进程。片式铝电解电容器设计着眼点在耐焊接热、结构紧凑、性能稳定及长寿命方面。工艺质量控制在铆接、包卷、浸渍、装配、装底座等方面。标准、国产化材料、工艺技术是国内生产片式铝电解电容器尚待解决的问题。     

Nanocrystallized tetragonal metastable ZrO2 thin films deposited by metal-organic chemical vapor deposition for 3D capacitors

ZrO₂ is a potential candidate for the realization of 3D capacitors on silicon for future Systems-on-Chip. This paper reports on the deposition of ZrO₂ thin films by metal-organic chemical vapor deposition on planar and 3D structures. Physico-chemical as well as electrical properties of the films are investigated. It is shown that the change of phase and microstructure of the film due to annealing at 900 °C under O₂ impacts directly on the electrical performance of the capacitors. Capacitance densities are 2 nF/mm² for planar capacitors and reach 8 nF/mm² for capacitors with pores etched in silicon with a 4:1 aspect ratio.     

Interface-hydrothermal synthesis of Sn3S4/graphene sheet composites and their application in electrochemical capacitors

An efficient interface-hydrothermal approach is developed to synthesize Sn₃S₄/graphene sheet composites (SSGSCs), where the graphene sheets (GSs) are separated by fine Sn₃S₄ nanoparticles (NPs) well-dispersed onto their surfaces. The SSGSCs are investigated as electroactive materials for electrochemical capacitors (ECs) application. Due to the positive synergistic effect of GSs and Sn₃S₄ NPs, the unique SSGSCs electrode owns the ability to deliver large specific capacitance and good electrochemical stability at high rates. Moreover, the method we proposed here provides a universal and simple approach to synthesize other metal sulfides/GSs composites for ECs and even for Li-ion battery applications.     

缓蚀剂在高压阳极箔电解扩孔中的作用机理

将高压阳极发孔铝箔在70℃、质量分数为3%的硝酸液中阳极电解扩孔,研究了添加大分子缓蚀剂聚苯乙烯磺酸(PSSA)后高压阳极箔的腐蚀机理。结果显示:添加PSSA后,腐蚀箔减薄量明显降低,质量损失率减小,并孔率降低,520 V化成的比容提高了约23%。隧道孔由孔口大、孔内小的"锥子"状转变为孔口小、孔内大的"垒球棒"状。铝箔表面的电位显著上升,而隧道孔内的电位基本保持不变,从而证明了,大分子缓蚀剂PSSA提高了铝箔表面和隧道孔口附近的电化学反应的阻力,电流主要分布到孔内,加速了孔内的扩孔过程。     

铝电解电容器开路和假性短路现象分析与改进

导针型铝电解电容器的开路现象主要是因为裂箔、钉接不良、钉接花瓣小、正箔表面箔灰厚及原箔腐蚀太深而造成。假性短路的现象主要是跑片、抽芯、钉花毛刺、导针毛刺、铝箔边缘毛刺、芯子高低脚等原因而造成。只要加强工艺的控制、选用适当的材料可以杜绝铝电解电容器的开路和假性短路现象的发生。     

Flexible Hybrid Paper Made of Monolayer Co3O4 Microsphere Arrays on rGO/CNTs and Their Application in Electrochemical Capacitors

A facile one‐step hydrothermal method is developed for large‐scale production of well‐designed flexible and free‐standing Co₃O₄/reduced graphene oxide (rGO)/carbon nanotubes (CNTs) hybrid paper as an electrode for electrochemical capacitors. Densely packed unique Co₃O₄ monolayer microsphere arrays uniformly cover the surface of the rGO/CNTs film. The alkaline hydrothermal treatment leads to not only the deposition of Co₃O₄ microspheres array, but also the reduction of the GO sheets at the same time. The unique hybrid paper is evaluated as an electrode for electrochemical capacitors without any ancillary materials. It is found that the obtained hybrid flexible paper, composed of Co₃O₄ microsphere array anchored to the underling conductive rGO/CNTs substrate with robust adhesion, is able to deliver high specific capacitance with excellent electrochemical stability even at high current densities, suggesting its promising application as an efficient electrode material for electrochemical capacitors.