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| Study on Preparation and Properties of Paper-based Separator for Li/MnO2 Primary Battery |
| Received:January 03, 2023 |
| DOI：10.11980/j.issn.0254-508X.2023.04.007 |
| Key Words:fibrillated tencel fibers separator pore structure battery performance |
| Fund Project:中央高校基本科研业务费专项资金资助。 |
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| Abstract:In this study， tencel fibers were used as raw materials to obtain fibrillated tencel fibers by pulping. By wet forming process， the separators made by fibrillated tencel fibers were applied to Li/MnO2 primary battery. The micromorphology， pore structure， and electrochemical properties of tencel separator with different fibrinization degrees and melt-blown non-woven fabric separator were investigated and compared. The results showed that the increase of fibrinization degree made the diaphragm surface fine fibers covering the backbone fibers. With the increase of fibrinization degree， the porosity of the separator decreased from 76.3% to 67.3%， the Gurley value of the separator increased from 3.30 s to 10.1 s， the average pore size of the separator decreased from 0.79 μm to 0.35 μm， and the ohmic impedance of the battery increased from 1.55 Ω to 1.94 Ω.Besides， the battery discharge voltgae platform and specific capacity were reduced significantly. Compared with melt-blown non-woven separator， tencel separator had smaller thickness， smaller average pore size and uniform pore size distribution， lower ionic impedance and stable discharge performance. |
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