Nafion-coated LiNi0.80Co0.15Al0.05O2(NCA) cathode preparation and its influence on the Li-ion battery cycle performance

Yiğitalp, Ayça and Taşdemir, Adnan and Alkan Gürsel, Selmiye and Yürüm, Alp (2020) Nafion-coated LiNi0.80Co0.15Al0.05O2(NCA) cathode preparation and its influence on the Li-ion battery cycle performance. Energy Storage . ISSN 2578-4862 Published Online First http://dx.doi.org/10.1002/est2.154

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Abstract

One of the main problems of LiNi0.80Co0.15Al0.05O2(NCA) materials is the sidereactions occurring during battery cycling. These side reactions result in capac-ity fading, which in turn decreases the life span of the battery. Conventionally,for nickel-rich cathodes, an inorganic layer is used as a protective layer. Apply-ing these layers may require additional complicated steps. To overcome thisproblem, we focused on coating the NCA electrode with a polymeric ion con-ductive layer that can easily be applied. For this purpose, using an ion-conductive polymer is a novel approach. We used Nafion as the protectivelayer on NCA electrodes. While the Nafion layer can protect the surfaceagainst the side reactions, it does not prevent the Li+ion flow. Following thispurpose, we synthesized NCA by a modified co-precipitation method followedby sintering at 750C. After the preparation of the NCA cathodes, we coatedthe surfaces with a more straightforward drip coating. The Nafion-coated elec-trodes delivered a superior electrochemical performance with 100% of dis-charge capacity retention even after 100 cycles at 0.1C. The electrochemicalimpedance spectroscopy revealed that the Nafion coating could effectively pre-vent passive layer formation, which causes capacity fading.
Item Type: Article
Subjects: T Technology > T Technology (General)
T Technology > TP Chemical technology
Q Science > QD Chemistry
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Chemistry
Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng.
Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences
Depositing User: Selmiye Alkan Gürsel
Date Deposited: 09 Jul 2020 14:09
Last Modified: 09 Jul 2020 14:09
URI: https://research.sabanciuniv.edu/id/eprint/40017

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