研究正极活性物质（PMA）的结构，相伴有两类问题：结构的形成
及其组织；电他在使用过程中，正极活性物质结构的变化与衰败。
首先对正极活性物质的结构与组织要有清晰的了解，自从20世纪60年代确定铅酸蓄电池正极活性物质中PbsO2有a-PbO2晶体，它是PbsO2的变体，它只能在碱性或中性介质中形成。还有作者提出a/p比在正极活性物质中决定正极的性能。
后来对a- PbsO2及各B- PbsO2这两种变体的形状由Simon确定。a-PbOZ是针状晶，a-PbO：是大小相等的小多面体。接着首次提出了正极活性物质的结构模型：针状Q-PbO：晶体形成-个网状体，这个网状体是-个导电体，且给极板赋予机械强度，多面体卜PbO：晶体参与充／放过程，并决定极板容量。
这个模型很快被抛弃，因为活性物质中针状的a-PbO：晶体已得到确认，并且认为Pbo：晶体的形态学取决于铅膏中晶体的形态学。为了说明正极活性物质容量是取决于叮pPbo：比，采用不同的正极活性物质对容量进行对比，不同铅膏形成的正极活性物质由不同的相组成，而这些活性物质容量是相等的，而当正极活性物质有不同微观结构组成的3BS铅膏与4BS铅膏形成的正极活性物质时，尽管相组成相同，而容量则有区别。
The structure that studies cathode live material(PMA), concomitant have two types of problems:The formation of structure
And its organization;Give or get an electric shock him in the process of using in, changing of cathode live material structure and decline.
Have to have clear understand to structure and organization of cathode activity material first, ever since that time 60's in 20th century certain lead sour storage battery cathode the PbsO2 contain a-PbO2 crystalses in the middle of the live material, it is a changing of PbsO2 body, it can at alkalescence or neuter gender lie to form in the quality.Still have the author puts forward a|the p compare in the cathode to decide a cathode in the live material of function.
Afterwards to the a- PbsO2 and each B- PbsO2 these are two kinds of change body of the shapes is made sure by Simon.The a-PbOZ is needle-like in shape crystal, a-PbO:It is the much smaller noodles body of all of the equalities.Immediately after put forward the structure model of cathode activity material for the very first time:Needle-like in shape Q-PbO:Crystal formation- net body, this net body BE-conduct electricity a body, and give pole the plank give machine strength, much noodles body Bu PbO:The crystal participates in Chong/pass a distance, and decide pole plank capacity.
This model is soon abandonned, because of the needle-like in shape a-PbO in the live material:The crystal has already got confirmation, and thinks Pbo:The appearance of crystal learns to be decided by the appearance of crystal in the lead cream to learn.For explaining the live material capacity of cathode is to be decided by Ding pPbo:Ratio, adopt the different cathode's live material carries on contrast to the capacity, the cathode live material of different lead cream formation from dissimilarity of mutually constitute, but these live material capacity is equal, but when cathode the live material has the cathode that the 3 BS lead cream and the 4 BS lead cream that the different tiny view structure constitutes form live material, though mutually constitute a homology, but the capacity then has differentiation.
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