High-Resolution Surface Analysis on Aluminum Oxide-Coated Li1.2Mn0.55Ni0.15Co0.1O2 with Improved Capacity Retention
| Autor: | Sven Ole Steinmüller, Björn Schwarz, Florian Sigel, Nadine Dannehl, Helmut Ehrenberg, Mathias Pein, Ulrich Hasenkox, Sylvio Indris, Lars Esmezjan, Dorothée Vinga Szabó |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Scanning electron microscope 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Micrometre Atomic layer deposition Chemical engineering Coating Transmission electron microscopy engineering Particle General Materials Science Nanometre Inductively coupled plasma 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 10:43131-43143 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | Thin alumina coatings on Li-rich nickel cobalt manganese oxide (Li-rich NCM) particles used as cathode material in Li-ion batteries can improve the capacity retention during cycling. However, the underlying mechanisms are still not fully understood. It is crucial to determine the degree of coverage of the particle’s coating on various length scales from micrometer to nanometer and to link it to the electrochemical properties. Alumina coatings applied on Li-rich NCM by atomic layer deposition or by chemical solution deposition were examined. The degree of coverage and the morphology of the particle coatings were investigated by time-of-flight secondary-ion mass spectrometry (ToF-SIMS), scanning electron microscopy, elemental analysis using inductively coupled plasma optical emission spectrometry, and scanning/transmission electron microscopy. ToF-SIMS allows investigating the coverage of a coating on large length scales with high lateral resolution and a surface sensitivity of a few nanometers. Regardless ... |
| Databáze: | OpenAIRE |
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