Schottky direct-current energy harvesters with large current output density

Nano Energy ◽  
2019 ◽  
Vol 62 ◽  
pp. 171-180 ◽  
Author(s):  
Hao Shao ◽  
Jian Fang ◽  
Hongxia Wang ◽  
Haitao Niu ◽  
Hua Zhou ◽  
...  
RSC Advances ◽  
2021 ◽  
Vol 11 (31) ◽  
pp. 19106-19112
Author(s):  
Xutao Yu ◽  
Haonan Zheng ◽  
Yanghua Lu ◽  
Runjiang Shen ◽  
Yanfei Yan ◽  
...  

In this study, a generator based on a metal/semiconductor dynamic Schottky junction has achieved ultrahigh and continuous direct current output by harvesting wind energy.


1991 ◽  
Vol 18 (4) ◽  
pp. 1091-1097 ◽  
Author(s):  
Shoei K.Stephen Huang ◽  
Anna R. Graham ◽  
Michael A. Lee ◽  
Michael E. Ring ◽  
Grace D. Gorman ◽  
...  

2017 ◽  
Vol 121 (suppl_1) ◽  
Author(s):  
Alan Sugrue ◽  
Chance Witt ◽  
Christopher V DeSimone ◽  
Deepak Padnanabhan ◽  
Ammar Killu ◽  
...  

Background: The use of direct current electroporation has the potential for significant utility because of its non-thermal approach to tissue destruction. However, the fear of inducibility of cardiac arrhythmias (particular ventricular fibrillation) when using electroporation remains of concern due to membrane poration and ion flux during periods of vulnerability occurring in ventricular repolarization. Objectives: Critically examine the incidence of arrhythmias in a series of acute canine studies to retrospectively determine cause and safe electoporative dosing margins. Methods: We performed electroporation ablation in 6 acute canine studies. These were experimental studies performed at sites critical in arrhytmogenesis. Sites included the pulmonary veins, left atrial appendage, superior vena cavae, right atrium and ventricle. Electroporation was delivered using an ECG gating algorithm so that QRS complexes are tagged and direct current energy is not delivered during the vulnerable portion of the T wave. Results: In 6 acute canine experiments, we delivered a total of 62 electroporation applications for ablation purposes. The average electroporation dosage delivered involved an average of 1427 Volts (range 750-3000 V), Pulse length of 100 ms, and number of pulses of 20.2 (range 10-100). AF was induced in 27.4% of electroporiatve applications. Atrial flutter/tachycardia occurred in 8.1%. VF occurred in only one application at a location of the left superior pulmonary vein. Conclusion: These data suggest that induction of VF is relatively uncommon with ECG gating and highlight its importance when using this modality. However, the induction of AF occurs with higher frequency. The actual mechanism as to why this occurs requires further systematic study.


Author(s):  
И.В. Пчельников ◽  
Т.Т.З. Нгуен ◽  
Л.Н. Фесенко

При электрохимической обработке хлоридсодержащих природных вод в бездиафрагменном электролизере образуются соли хлорноватистой кислоты, проявляющие окислительные свойства. Этот процесс широко используется для производства дезинфицирующих растворов на основе гипохлорита натрия. Сырьем для производства гипохлорита натрия могут быть не только искусственно приготовленные солевые растворы, но и природные минеральные воды, содержащие хлориды. Электролиз таких растворов приводит к образованию на катоде электролизера нерастворимых солей кальция и магния, что препятствует массообмену в межэлектродном пространстве, а также к возникновению аварийных ситуаций. В первой части статьи приведены результаты исследований прямого электролиза постоянным и реверсным током пресной воды г. Донгхой, Республика Вьетнам. В проведенных испытаниях определяли влияние реверсного тока в сравнении с постоянным током на снижение образования нерастворимых веществ на катодах электролизера. Эксперименты показали преимущество реверсного тока над постоянным. Так, при электролизе реверсным током продолжительностью периода до 6 часов масса отложений на электродах не увеличивалась, а на постоянном токе накапливалась с момента начала электролиза. Это связано с тем, что осадок, образующийся в катодный полупериод, растворяется в анодный полупериод кислотой – продуктом окисления воды. Выход хлора по току для водопроводной воды составил не более 23% с плотностью тока 100 А/м2. During the electrochemical processing of chloride-containing natural water in a membraneless electrolyzer, salts of hypochlorous acid are formed that are exhibiting oxidizing properties. This process is widely used for the production of sodium hypochlorite disinfectants. The raw material for the production of sodium hypochlorite can be not only artificially prepared saline solutions, but also natural mineral water containing chlorides. The electrolysis of such solutions results in the formation of insoluble calcium and magnesium salts at the cathode of the electrolyzer thus inhibiting mass transfer in the interelectrode space and the occurrence of emergency situations. The first part of the article presents the results of studies of direct electrolysis of fresh water with constant and reverse current in Dong Hoi city, Republic of Vietnam. In the conducted tests the effect of reverse current in comparison with direct current on the reduction of the formation of insoluble substances at the cathodes of the electrolyzer was determined. The experiments have shown the advantage of reverse current over direct current. So, during the electrolysis with reverse current for a period of up to 6 hours, the amount of deposits on the electrodes did not increase, however, with direct current the deposits accumulated from the very beginning of the electrolysis process. This is due to the fact that the precipitate formed during the cathodic half cycle is dissolved during the anodic half cycle by acid, a product of water oxidation. The current output of chlorine for tap water was no more than 23% with a current density of 100 A/m2.


1940 ◽  
Vol 11 (12) ◽  
pp. 412-415 ◽  
Author(s):  
S. N. Treviño ◽  
Franklin Offner
Keyword(s):  

2016 ◽  
Vol 25 (07) ◽  
pp. 1630003 ◽  
Author(s):  
Chuang Wang ◽  
Zunchao Li

Various start-up circuits (SUCs) for low input voltage self-powered direct current-type (DC-type) energy harvesters have been proposed in recent years, and their structures have been evolving and changing continuously. A general classification and systematic overview of SUCs are presented here. With the development of CMOS process technologies, recent advances in SUCs have paved the way for lower input voltage, simpler structures, lower cost, and better performance. So far, no works have given an overall description of SUCs for low input voltage self-powered energy harvesters. This work is intended to not only provide insights into the topologies of SUCs, but also make a conclusion which identifies their developing tendency.


Author(s):  
Pengfei Chen ◽  
Jie An ◽  
Renwei Cheng ◽  
Sheng Shu ◽  
Andy Berbille ◽  
...  

Despite great potential of triboelectric nanogenerators (TENGs) as a promising energy harvesting technology, their practical applications are still hindered by their pulsed outputs with high crest factor. Here, through a...


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