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• W3132323050 endingPage "1017" @default.
• W3132323050 startingPage "1003" @default.
• W3132323050 abstract "Abstract Surface coating is an effective concept to protect layered cathode active materials (CAMs) in lithium ion batteries from detrimental side reactions. Dry powder coating is a fast and cost‐effective coating process, and here we transfer this coating approach from Al 2 O 3 to nanostructured fumed TiO 2 and ZrO 2 coatings on the same NMC (Li[Ni,Mn,Co]O 2 ) material. Using similar processing, this allows a direct comparison of the characteristics of the achieved coating layers and their influence on the cycling performance of high‐nickel NMC. The nanostructured small oxide aggregates result in a quite homogeneous coating layer with a certain porosity around each CAM particle. Significantly enhanced long‐term cycling stability is observed, with a trend of increasing stability in the series ZrO 2 <TiO 2 <Al 2 O 3 . Fumed Al 2 O 3 and TiO 2 coating layers prevent cathode particle cracking and disintegration successfully, while fumed ZrO 2 only shows a moderate protection effect. Each coating material enhances the rate performance compared to uncoated NMC in the row TiO 2 <ZrO 2 <Al 2 O 3 . XPS measurements of cycled electrodes indicate a partial incorporation of lithium ions in the crystalline TiO 2 and ZrO 2 coating layers, contributing to the enhanced lithium‐ion transport across the CAM surface layer, as observed before for fumed γ ‐Al 2 O 3 coatings. Summarizing the results, the best overall cycling performance was achieved by coating high‐nickel NMC with fumed Al 2 O 3 , providing the highest rate capability and the best long‐term cycling stability." @default.
• W3132323050 created "2021-03-01" @default.
• W3132323050 creator A5017178758 @default.
• W3132323050 creator A5025051289 @default.
• W3132323050 creator A5084882618 @default.
• W3132323050 date "2021-02-23" @default.
• W3132323050 modified "2023-10-14" @default.
• W3132323050 title "Improved Cycling Performance of High‐Nickel NMC by Dry Powder Coating with Nanostructured Fumed Al₂O₃, TiO₂, and ZrO₂: A Comparison" @default.
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