Preparation of Polymer Membrane With Composite Attapulgite and Its Application in Lithium Batteries
Among the four main components of lithium batteries,the performance of the separator can directly affect the performance of the battery.At present,polyolefin separators with mature preparation techniques and relatively low prices are widely used in the market,but they have poor porosity,poor thermal stability,and poor electrolyte-absorbing,which limits the development of lithium batteries.Therefore,performance modification of the separator is an important means to improve the performance of lithium batteries.In this article,polypropylene membrane was used as the substrate,and electrostatic adsorption method was used to coat a layer of attapulgite on the surface of polypropylene membrane,the performance improvement effect of attapulgite on the membrane was explored.The results showed that when the mass concentration of attapulgite was 1 mg·mL-1 and the immersion time of the membrane was 12 h,attapulgite could successfully composite on the surface of the membrane.The porosity of the composite membrane was 78%,and its liquid absorption was better than that of the blank membrane significantly.At the same time,its electrochemical performance was also significantly improved.
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