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铅青化成制正极活性物质的不同结构

由不同相组成的铅青通过化成制得的正极活性物质有不同的结构，通过扫描电镜分析表明：正极活性物质是由不同形状的凝聚块的枝状构架所组成，带有许多大孔的凝聚块彼此连接成沟渠，这是由大孔结构或大大小小的正极活性物质凝聚块形成的骨架的组成体。在高倍电镜下看到凝聚块是由大量的针状或棱柱状晶体组成的，这意味着上述晶粒是正极活性物质的最小结构单元，这些最小结构单元―不同形态学的单个晶粒，在每个凝聚体内各晶体之间有许多微孔，这些微孔的数量与体积大小，都取决于晶体的形态学。在凝聚体内晶体与微孔的总体，在这个层面上而言对正极活性物质，就是微观结构与晶体。
可以预言，在正极工作时有两种不同功能的结构层面：在电解液与Pbo：晶体之间，这个系统中有硫酸的流动，有水的流动以及离子的迁移（运动），微孔会产生-个很大的活性表面，这个表面上发生电化学反应，在这个表面上必然在很大程度上决定了极板的容量。作为凝聚体是-个机械的骨架传输电流，作为-个传输系统会与小晶体Pbo：保持-体。

The lead that mutually constitutes to°from the dissimilarity is green to pass to become to make of cathode the live material contain different structure and pass a scanning electricity mirror to analyze enunciation:The cathode live material is constituted by the -like in shape frame that is coagulated a piece by the different shape and take to have coagulating of many big boreses piece each other links into ditch, this is the constituting of framework that is coagulated a piece of formation by the big bore structure or the various cathode live material body.At Gao Bei Dian mirror the bottom see coagulate a piece from a great deal of needle-like in shape or Leng the pillar-like in shape crystal constitute of, this means that the above-mentioned crystal grain is a cathode the minimum structure unit of activity material, these minimum structure unit ― the different appearance learns of single crystal grain, coagulate an of each crystal inside the body to have many tiny bores in each one, the amount and physical volume size of these tiny bores, all be decided by the appearance of crystal to learn.At coagulate crystal inside the body with tiny bore of total, on this level but speech to cathode the live material is tiny view structure and crystal.
Can predict, have two kinds of structure levels of different functions when the cathode works:In the electrolyte and Pbo:Of crystal, there is the fluxion of sulfuric acid in this system, there are aqueous fluxion and the migration(exercise) of ion, the tiny bore will produce- very big live surface, this superficial occurrence gives or gets an electric shock chemical reaction, at this superficially and by all means and to a large extent come to a decision pole knothole capacity.Conduct and actions coagulates a body BE- machine of the framework deliver electric current, conduct and actions-deliver system meeting and small crystal Pbo:Keep-body.

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