Surface modification of LiNi0.8Co0.15Al0.05O2 particles via Li3PO4 coating to enable aqueous electrode processing.,ChemSusChem

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Surface modification of LiNi0.8Co0.15Al0.05O2 particles via Li3PO4 coating to enable aqueous electrode processing.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-09-24 , DOI: 10.1002/cssc.202001907
Michael Hofmann ₁ , Felix Nagler ₁ , Martina Kapuschinski ₁ , Uwe Guntow ₁ , Guinevere A Giffin ₁

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The successful implementation of an aqueous‐based electrode manufacturing process for nickel‐rich cathode active materials is challenging due to their high water sensitivity. In this work, the surface of LiNi_0.8Co_0.15Al_0.05O₂ (NCA) was modified with a lithium phosphate coating to investigate its ability to protect the active material during electrode production. The results illustrate that the coating amount is crucial and a compromise has to be made between protection during electrode processing and sufficient electronic conductivity through the particle surface. Cells with water‐based electrodes containing NCA with an optimized amount of lithium phosphate had a slightly lower specific discharge capacity than cells with conventional N‐methyl‐2‐pyrrolidone‐based electrodes. Nonetheless, the cells with optimized water‐based electrodes could compete in terms of cycle life.

中文翻译：

通过 Li3PO4 涂层对 LiNi0.8Co0.15Al0.05O2 颗粒进行表面改性，以实现水性电极加工。

由于富镍正极活性材料对水的敏感性较高，成功实施水基电极制造工艺具有挑战性。在这项工作中，LiNi _0.8 Co _0.15 Al _0.05 O ₂ (NCA) 的表面用磷酸锂涂层进行修饰，以研究其在电极生产过程中保护活性材料的能力。结果表明，涂层量至关重要，必须在电极加工过程中的保护和通过颗粒表面的足够电子传导性之间做出折衷。具有含有 NCA 和优化磷酸锂含量的水基电极的电池比具有传统N-甲基-2-吡咯烷酮电极的电池具有略低的比放电容量。尽管如此，具有优化水基电极的电池可以在循环寿命方面具有竞争力。

更新日期：2020-11-21

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