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secondary carbon atom

( 3 ) the free - standing porous silicon films with continuous porous structure were prepared on single crystal silicon wafer by the method of anodic oxidation and electrochemical etching - electropolishing , and firstly used as the anode materials for lithium ion secondary batteries . the capacities of lithium ions storage and the process of charge and discharge of this nano - silicon anode materials as well as the influence of the structure of ps on behavior of storing lithium ions were inspected at length . on the other hand , through the process of charge and discharge in cells , the lithium of light metal element could be electrochemically doped into ps at different doping levels 胡勁松河北師死大學碩士學位論文( 3 )利用陽極氧化法在單晶硅基底上制備了多孔硅自支撐膜,并首次將這種具有連續多孔結構的硅材料用作了理離子電池的陽極材料,考察了這種納米級硅陽極的儲鉀性能和充放電過程,分析了材料結構對其儲理行為的影響;另一方面,利用這種電池充放電過程在多孔硅中電化學引入了不同點綴程度的輕金屬鉀元素,考察了鉀點綴對多孔硅自身結構,及至性質所帶來的影響,提供了一種通過電化學方法插入埋離子從而連續調整多孔硅發光性質的有效方法。

The significant capacity loss of the spinel limn2o4 during cycling hereby prevents its wider use as cathode materials for lithium secondary batteries . there are two main factors resulting in fading capacity and poor cyclability , one is the jahn - teller distortion of mn3 + , and the other is mn dissolution to electrolyte . the main objects of this paper are to resolved these key problems effecting on the performance of batteries 針對limn _ 2o _ 4正極材料在電化學循環過程中發生jahn - teller畸變和mn在電解液中溶解這兩個導致容量衰減和循環性能劣化的關鍵問題,分別采用陰陽離子復合摻雜和尖晶石晶粒表面包裹兩種措施,對尖晶石結構limn _ 2o _ 4正極材料進行了改性研究。

The charging of lead - acid battery , the most widely accepted secondary battery , constrained to technological limitation , mainly adopted traditional charging methods such as constant voltage , constant voltage with current limitation , constant current and etc . those methods may not follow the internal physical and chemical laws within the battery , leading to serious overcharge and gas - generation , and resulting in low - efficiency , time - consumming and prone - to - damage of the charging operation 二次電池中被最廣泛接受的鉛酸蓄電池由于技術條件的限制,其充電主要采用恒壓、恒壓限流、恒流等常規模式,這些充電方法未能遵從電池內部的物理化學規律,大多存在著嚴重的過充電和析氣等現象,并導致充電過程的低效,耗時和易損。

Lithium metal is one of the electrode materials those have the highest specific mass energy , and the lithium secondary battery with lithium metal anode always attracts people ’ s attentions . whileas , before the commodity of lithium secondary battery , it is the dissatisfactory cycleability and safety of lithium metal anode that must be resolved firstly 金屬鋰是目前已知的質量比能量最高的電極材料之一,以金屬鋰作為負極材料的鋰二次電池長期受到人們的關注,但在其商品化之前,必須解決金屬鋰負極在循環性能和安全性能上的不足。

Lithium secondary batteries are the future of chemical power sources on account of their properties such as high specific energy , portable , high working voltage , etc . since lithium possesses supreme high specific energy ( 3860ah / g ) and low potential ( - 3 . 036v , vs . h + / h2 ) , the increasing of battery ' s specific energy depends on the performance of positive active materials in large 鋰二次電池以其比能量高,輕便,工作電壓高等特點,成為化學電源未來的發展方向。由于鋰負極的容量極大,所以鋰電池比能量的提高很大程度上取決于正極材料的特性。目前廣泛使用的正極材料鋰金屬氧化物( licoo2 , linio2 , limn2o4等)理論容量均在110 - 200ah / kg ,就電池的容量而言,可發展空間已很小。

The potential energy surface scan tells us that the lithium into or out of the graphene layers is the charge - discharge process of li - ion secondary batteries which concurs with the continuous charge transfer between lithium and the graphite layers which synchronizes with the shift of the graphite layer stacking sequences between the abab type and the relatively stable aaaa type 計算結果顯示,鋰離子嵌入碳層的過程中同時伴隨著鋰和石墨間發生電荷連續轉移,同時石墨碳層堆積方式由aaaa型變為abab型,二者協同進行,最終嵌鋰石墨相對于鋰在石墨表面體系較穩定。

The present studies have proved that the most important factor which influences the performances of lithium metal anode in battery is the solid electrolyte interphase interface - film ( sei film ) on lithium anode . and how to make lithium metal anode have a sei film with favorable composition and stable configuration , or make the sei film have better stability , is the key to improve the electrochemistry performances of lithium metal anode in lithium secondary battery 已有的研究證明:影響金屬鋰負極在電池中性能的主要因素是其表面的固體電解質中間相界面膜( sei膜)的性能;如何使鋰金屬電極表面具有組成良好、結構穩定的sei膜,或者使鋰電極表面sei膜能夠更好的“穩定化” ,是提高鋰二次電池中鋰金屬負極電化學性能的關鍵。

Li - ion secondary batteries have a great prospect in application and exploitation as an interesting kind of electrical source . improving and enhancing the electrochemical performance of batteries mainly depends on the change - discharge property of cathode electrode materials 鋰離子二次電池是應用和開發前景最好的一種化學電源,改善和提高鋰離子電池的電化學性能關鍵是選取充放電性能良好的正極材料。

Li - ion secondary batteries have a great prospect in application and exploitation as an interesting kind of electrical source . improving and enhancing the electrochemical performance of batteries mainly depends on the change - discharge property of negative electrode materials 鋰離子二次電池是應用和開發前景最好的一種電源,改善和提高鋰離子電池的電化學性能關鍵是選取充放電性能良好的負極材料。

High - precision thickness measurement is an essential requirement for producing many leading - edge materials such as the lcds and secondary batteries used in the latest generation of mobile phones and pcs . as a consequence , the demand for thickness meters is increasing 現在的手機電腦所采用的顯示屏,充電池等先進材料是有高精密厚度要求的,所以對其厚度的測量需求也有所增加。

Lithium - ion secondary battery duo to high specific energy and good cycle performance has attracted considerable attention , but its disadvantages of high cost and low safety can not been ignored by using organic electrolyte 鋰離子電池以比能量高、循環性能好的優點得到了廣泛關注,但因采用有機電解液,電池成本高,存在安全性差等不足。

The capacitors as compared to secondary battery have prominent advantages , especially electrical double - layer ( super ) capacitors with high power and large currents are presently needed 摘要電容器與二次電池相比,有著顯著的優點,尤其是高功率并能提供大電流的電雙層(超級)電容器正是時代所需。

The recent technological achievement of lithium ion secondary batteries is traced . in the preface , stated the positive and negative material synthesis method and development possibility 本文從制備超細和純度高的co3o4原料出發,進行了低溫固相法合成研究,力圖解決這些問題。

Secondary batteries for the propulsion of electric road vehicles - part 2 : dynamic discharge performance test and dynamic endurance test iec 61982 - 2 : 2002 ; german version en 61982 - 2 : 2002 corrigendum 1 : 2002 電動道路車輛驅動用二次電池.第2部分:動態放電性能試

In this paper , the low - temperature synthesis method - sol - gel mehtod was used to improve the capacity fading of the cathode with cycling for lithium - ion secondary battery 本文針對鋰錳氧化物循環過程中容量衰減的問題,采用了低溫合成方法即溶膠凝膠法。

Primary batteries are used once and then discarded ; secondary batteries operate from a mostly reversible chemical reaction and can be recharged several times 一次電池使用過一次就被丟棄;二次電池以一種(通常是)可逆的化學反應工作,可以多次充電。

Secondary batteries for the propulsion of electric road vehicles - part 3 : performance and life testing traffic compatible , urban use vehicles iec 61982 - 3 : 2001 ; german version en 61982 - 3 : 2001 電動公路車輛動力裝置用二次蓄電池.第3部分:性能和壽

Ni / mh battery is regarded as the third generation of practical secondary battery with high price rate compared with the batteries of the other series Ni mh電池是第三代實用的可充電電池。與其它系列的電池相比, ni mh電池具有很高的性價比。

The sort of polymer solid electrolyte materials for lithium - ion secondary battery , their conduction mechanism , performance and evolution were especially introduced 重點介紹了鋰離子二次電池中聚合物電解質分類、導電原理、性能以及發展方向。