The effect of diamond-like carbon coating on LiNi0.8Co0.15Al0.05O2 particles for all solid-state lithium-ion batteries based on Li2S–P2S5 glass-ceramics
| Autor: | Taku Watanabe, Yuichi Aihara, Youngsin Park, Seitaro Ito, Heidy Visbal, Seok-Gwang Doo |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Diamond-like carbon Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences law.invention Coating X-ray photoelectron spectroscopy law Electrical and Electronic Engineering Physical and Theoretical Chemistry Renewable Energy Sustainability and the Environment 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Secondary ion mass spectrometry Surface coating chemistry Chemical engineering engineering Lithium 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of Power Sources. 314:85-92 |
| ISSN: | 0378-7753 |
| Popis: | There have been several reports on improvements of the performance of all solid-state battery using lithium metal oxide coatings on the cathode active material. However, the mechanism of the performance improvement remains unclear. To better understand the effect of the surface coating, we studied the impact of diamond-like carbon (DLC) coating on LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA) by chemical vapor deposition (CVD). The DLC coated NCA showed good cycle ability and rate performance. This result is further supported by reduction of the interfacial resistance of the cathode and electrolyte observed in impedance spectroscopy. The DLC layer was analyzed by transmission electron microscopy electron energy loss spectroscopy (TEM-EELS). After 100 cycles the sample was analyzed by X-ray photo spectroscopy (XPS), and Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS). These analyses showed that the thickness of the coating layer was around 4 nm on average, acting to hinder the side reactions between the cathode particle and the solid electrolyte. The results of this study will provide useful insights for understanding the nature of the buffer layer for the cathode materials. |
| Databáze: | OpenAIRE |
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