cathode reaction 中文意思是什麼
cathode reaction
解釋
陰極反應-
Oxygen diffusion transport and electrochemical reaction in the oxygen cathode of direct methanol fuel cell ( dmfc ) have been expressed with the tffa model. model calculation has been carried out to investigate the effects of structural parameters of the dmfc cathode on the electrode performance, which is respectively represented by the curve of cathode overpotential versus current density. much attention has been paid to parameters including the porosity of the reaction layer, the thickness of the thin - film on the flooded - agglomerate, the radius of the flooded - agglomerate, the volume fraction of the flooded - agglomerates in the reaction layer
本文首先運用tffa模型描述直接甲醇燃料電池（ dmfc ）陰極氧氣的傳遞和電化學反應過程，研究了過電位-電流密度曲線受陰極結構參數變化的影響程度，其中著重考慮了以下幾個參數：催化層的孔隙率，浸漬聚集體薄膜的厚度，浸漬聚集體的半徑，浸漬聚集體在催化層中的體積分數。 -
The voltage of lithium - intercalation reaction, impedance and structural stability of intercalation - type cathode material were analysed and calculated. theoritical results show that the reaction voltage depends on the content of lithium and the bond energy, and that the key ways to lower the electrode impedance are to increase the electronic conductivity of the electrode and the diffusion coefficient of lithium ion in the host and to decrease the size of powder. in addition, the thermal stability of lithium - insertion structure can be improved by using crystallographic co - lattice theory and doping treatment
本文從嵌入式陰極材料的嵌鋰反應的電壓、阻抗及結構穩定性的分析和理論計算著手，得到了電壓取決于基體中各種離子間的鍵能及鋰含量、降低電極阻抗的關鍵是提高電子型導電性和li ~ +在基體中的擴散系數及減小粉末粒度的理論依據及其利用晶體的共格原理和摻雜改性的方式來提高材料嵌鋰結構的熱穩定性的設計思路。 -
The sol - gel method and solid - state thermal reaction technique were used to prepare the composite oxides with variable lithium content. the doping treatments of some compounds were conducted. dta and tg were used to analyse synthesis mechanism, xrd to analyse phase composition, sem to observe morphology, li - b / licl - kcl / oxide simulated thermal cells to analyse the lithium - intercalation mechanism and properties of cathode material
實驗中採用溶膠?凝膠工藝和固相熱反應技術制取相應的不同鋰含量的復合氧化物，並嘗試對某些化合物進行適當的摻雜處理，應用dta和tg分析合成機制、 xrd分析所得物的物相組成、 sem觀察其形貌，模擬li - b / licl - kcl /氧化物的單體熱電池來分析陰極材料的嵌鋰機制及其電極性質。 -
For the pemfc cathode, besides above the parameters, the effects of the thickness of the reaction layer, the ion conductivity of nafion electrolyte and the electronic conductivity in carbon phase of the reaction layer on the electrode performance have also been investigated
在對pemfc陰極的研究中，除了以上參數以外還考慮了反應層厚度， nafion ~ （ ? ）電解質的離子傳導率以及反應層中碳相傳導率對電極性能的影響。 -
To influence the composition and the permutation mode of reaction particle on the interface and the reaction speed of interface by complex action, thus preventing the metal ion from discharging and improving the cathode polarization
通過絡合作用，影響界面上反應粒子的組成、排列方式及界面反應速度，從而阻化金屬離子的放電，提高陰極極化。 -
A significant suppression of phase transitions and lattice changes during cycling is occurred for ti - doped materials, and a decrease of interface reaction activity between the cathode and electrolyte is also demonstrated for ti - doped cathodes. as a result, the capacity losses, which are originated from structural changes and interface reactions during cycling, decrease and thereby cycling life increases for ti - doped materials
摻欽后，電極材料的離子分佈形式發生變化，引起材料結構中的化學鍵產生變化，電極材料充放電過程中的結構相變得到有效抑制，結構變化相應減小，電極材料在高電位下的界面反應活性也減弱，從而減小了由結構變化和界面反應引起的容量損失，改善了電極材料的充放電循環性能。 -
When the air is fed to cathode of pemfc, the oxygen concentration decreases along the channel because of reaction, and the oxygen distribution is affected by land of the flow plate. so the oxygen distribution is uneven on cathode side and leads to dropping of cell performance
當pemfc陰極供給空氣時，因氧氣在催化層參與反應被消耗，其濃度沿流道逐漸降低，加之受流道間隔的影響，陰極側氧氣濃度不均勻，這導致電池性能惡化。 -
Oxygen diffusion transport and electrochemical reaction in the oxygen cathode of alkaline fuel cell ( afc ) and pemfc have been expressed with the tffa model, including oxygen transferring in gas channel of gas diffusion layer and reaction layer, oxygen dissolution and diffusion in thin - film of reaction layer, oxygen reaction and diffusion in flooded - agglomerate of reaction layer and the conduction of electron and ion. numeric algorithm of the model equations is also obtained
本文將tffa模型應用於堿性燃料電池（ afc ）和質子交換膜燃料電池（ pemfc ）陰極，推導出陰極各種傳遞和反應過程的描述方程，包括氧氣在氣體擴散層和反應層氣體通道中的擴散，氧氣在反應層薄膜中的溶解和擴散，氧在反應層浸漬聚集體中的反應和擴散以及電子和離子的傳導，並給出方程的數值解法。 -
Then we prepared na2fepo4f cathode material coated with carbon by solid - state reaction. as cathode material, the first discharge capacity is 111mah / g and the capacity reduces to 102. 1mah / g after 20 cycles. ultrafine na2fepo4f powders synthesized by a sol - gel process also shows a good electrochemical performance
隨后採用在材料表面覆碳的方法對氟磷酸亞鐵鈉進行改性，結果表明當摻碳量為5 %時，電池的首次放電比容量為111mah / g ，第20次的放電比容量為102 . 1mah / g 。 -
The na2fepo4f cathode materials for sodium ion battery were prepared by solid state reaction and the influence of synthesizing temperature and morphology on the electrochemical performance of na2fepo4f powders in sodium ion batteries were systematically studied. the results indicate that na2fepo4f synthesized at 750 exhibited good electrochemical performance, whose first specific discharge capacity is 60mah / g, after 20 times cycling, the average specific discharge capacity is 51. 1mah / g
首先採用固相法制備了氟磷酸亞鐵鈉粉體，研究了不同煅燒溫度對合成材料顯微結構和電化學性能的影響，結果表明750下合成材料體現出較好的電化學性能，首次放電容量為60mah / g ，循環20次后，容量下降為51 . 1mah / g 。 -
The fitness of four negative electrode materials such as al, fe, zn, cd, and of six membranes materials : microfiber glass mat separator, polyethylene, polypropylene, polyvinyl chloride, vinylon, soapnated cellulose acetate, and of four current collects : carbon fiber ; nickel foam ; nickel foam sthongthened by iron wire net, punched silver grid in the super - iron alkaline batteries was comparatively studied. the influence of two storaged method ( with and without electrolyte ) and two impurities ( zno, fe ( oh ) 3 ) to the experiment cell ' s self - discharge nature was also comparatively studied. at last, the nature of discharge. structure and electrochemistry of experimental cell with k2feo4 as cathode active material prepared by three different methods : high temperature reaction, hypochlorite oxidizing and electrolysis, was comparative ly studied. we can conclude : i ) the open - circuit potential and the flat of work potential and the percent of capacity of k2feo4 till 1. 0v during the discharge at constant load of experimental cells decreased by the order of al / k2feo4, zn / k2feo4, cd / k2feo4, fe / k2feo4. as for the nature of charge - discharge cycle, cd / k2feo4 fe / k2feo4 zn / k2feo4. in water solute electrolyte, although al / k2feo4 can n ' t be used as storage battery, it have great potential as primary cell or storage cell from the aspect of its discharge capacity. discharge power
採用組裝實驗電池、 x -射線衍射（ xrd ）和循環伏安（ cv ）的方法，從實驗電池的放電特性、充放電循環特性、自放電特性，不同高鐵酸鹽的結構特性和電化學特性幾個方面，對4種金屬負極材料（ al 、 fe 、 zn 、 cd ） 、 6種隔膜材料（復合玻璃纖維、幅射接枝聚乙烯、改性聚丙烯、聚氯乙烯、維尼綸無紡布、皂化再生纖維素） 、 4種集流體材料（泡沫鎳、以鐵網為加強層的泡沫鎳、切拉銀網、炭纖維編織網）在堿性高鐵電池中的適用性進行了比較研究；對2種雜質組分（ zno 、 fe （ oh ） _ 3 ）和2類不同貯存方式（干、濕）對實驗電池自放電特性的影響進行了比較研究；對3種方法（高溫固相反應、次氯酸鹽氧化、直流電解）所制k _ 2feo _ 4的實驗電池的放電特性、結構特性和電化學性能進行了比較研究。 -
In this article, the micromorphological structure of pva - copper gradient composite film ( mpgcf ) obtained from the electrochemical reduction of a swelling cathode films ( scfs ) was studied by the scaning electronic microscope and the relationship between the micromorphological structure of the composite film and the electrochemical conditions such as the weight ratio of pva to cuc12, the material of the electrode, the concentration of the medium solution, the dring time of scf, the power voltage, the time of the electochemical reaction etc, investigated
本文採用「溶液還原法」制備了一種新型的聚合物基金屬梯度復合材料（ mpgcf ） ? pva /銅梯度復合膜。通過掃描電子顯微鏡觀察了梯度復合膜的形態結構並研究了其形態結構與電化學條件之間的關系。然後在此基礎上，探討了梯度復合膜的形態結構與力學性能之間的關系。 -
Degradation of microcystins by electro - fenton reaction using an activated carbon fiber cathode
活性碳纖維陰極電芬頓反應降解微囊藻毒素研究 -
In the chapter 2, the spinel lim2o4 cathode material has been studied. the precursors have been prepared from lithium hydroxide, manganese acetate and citric acid by the method of low - heating solid - state reaction with a molar ratio of li + / mn2 + = 1 : 2
全文共分為六章，主要內容如下： 1 、以醋酸錳、氫氧化鋰和檸檬酸為原料，採用低熱固相反應法合成了尖晶石limn _ 2o _ 4正極材料。 -
In this paper, the preparing technological parameters, formation mechanism and structures of ( lithium ) vanadium oxides ( nanocrystalline vo2, amorphous v2o5, layered li1 + xv3o8 and inverse spinel linivo4 ) are systematically studied and discussed, and some properties of the products are measured as cathode materials for lithium ion batteries. the main results are as follows : ( 1 ) nanocrystalline vo2 has been successfully synthesized by a solution chemical reaction method in normal temperature and pressure. the procedure involves v2o5 reacts with koh to form k3vo3 in water and then k3vo3 is reduced with kbh4 around ph = 4 forming vo2 precipitation in aqueous
本文從實驗與理論分析相結合的角度對（鋰）釩氧化物（納米vo _ 2 、非晶態v _ 2o _ 5 、層狀li _ （ 1 + x ） v _ 3o _ 8及反尖晶石型linivo _ 4 ）制備過程中工藝參數、結構和形成機理等方面進行了系統深入的研究，對（鋰）釩氧化物電性能進行了初步測試，取得的主要結果如下： （ 1 ）成功的在常溫常壓下通過溶液化學反應直接制得具有納米結構的vo _ 2粉。 -
( i ) in situ spectroscopy of the intermediate oxygen specics in cathode rcaction of mcfc the ciarification of cathode reaction mechanism is a very important theoretical direction to improve mcfc performance and to develop new catl1ode materials
因而，本論文對于長期存有爭議而未能解決的難點一酸性條件下的陰極反應機理及中間氧物種，為陰極反應機理的深入研究提供了直接而確鑿的實驗證據。 -
A study on the synthesis, structure and performance of linio2 - based compounds as cathode materials for lithium ion batteries was carried out systemically and in detail in this dissertation. as the first step of this study, a sol - gel method using citric acid as a chelating agent was developed. the reaction conditions in sol - gel process, pre - calcination process and calcination process, especially sintering temperature and sintering time in calcinations process, were analyzed and optimized carefully
本文採用多種結構分析、表面分析、熱分析和電化學研究方法和實驗手段，從合成方法、結構特徵、電化學性能、熱穩定性和貯存性能等多方面對鋰鎳氧系列電極材料進行了系統深入的研究，制備出性能良好的鋰鎳氧系列電極材料，解釋了鈦的摻雜對電極材料的作用機理，揭示了鋰鎳氧系列電極材料的貯存失效機理，並借鑒和發展了rietveld結構精修方法和tpd - ms技術在鋰離子電池電極材料研究中的應用。 -
Special attention is paid to the consequences of methanol crossover in cathode reaction and cathode over - potential. good agreement is found between simulations and experiments in regard to the v - i character of dmfcs. based on the theory of parallel electrode reaction, it becomes possible to obtain quantitatively the value of over - potential caused by methanol crossover, which is either implicit or not included in the overall cathode over - potential in previous models
該模型涵蓋了dmfc中的主要物理化學過程，包括：甲醇水溶液在膜電極內的擴散、對流和電遷移；質子在陽極催化劑層和陰極催化劑層內的傳遞；氧氣、水蒸汽在陰極的擴散；陽極催化劑層內的甲醇氧化反應動力學；以及陰極催化劑層內的氧還原和甲醇氧化反應動力學。 -
The above - mentioned problems are correlated and dependent c1osely each other, whose settiement wiii generate definitely vital promotion to mcfc industry accordingly, the thesis focuses on ( 1 ) in situ spectroscopic studies of cathode reaction mechanism in mcfc, ( 2 ) development of the novel research methods and experimental apparatuses for in situ monitoring the cathodic process of nio cathode ; ( 3 ) further eiucidation to the mechanisms about dissoiution and deformation of nio cathode, and exploration of the new approach to lowdown the dissolution and deformation of nio cathode in mcfc
本論文工作側重圍繞這四個問題，從研究方法、實驗儀器直至廈門大學理學博士論文研究主體進行了全新的嘗試和探索，以期達到全面深入的和實質性的進展。本論文的主要研究結果可歸納如下；一陰極反應過程活化中間氧物種的原位檢測很顯然，陰極反應機理的澄清對于提高電池性能以及選擇陰極材料等方面都有著重要的理論指導作用。 -
( l ) the mechanism of cathode reaction under mcfc operation, especially the variety of crucial intermediate - - active oxygen species, is always controversia1 and has not come to an agreement
（ 1 ）對于mcfc實際運行條件下陰極反應機理的澄清，尤其是其中的關鍵角色?活性中間氧物種的鑒定，至今尚存有爭議，未達成統一。
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