Superlattice-structured films by magnetron sputtering as new era electrodes for advanced lithium-ion batteries
| Autor: | Khalil Amine, Zihua Zhu, B. Deniz Karahan, Levent Eryilmaz, Ali Abouimrane, Xiaobing Zuo, Said Al-Hallaj, Ozgul Keles, Zonghai Chen, Rachid Amine |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Mo and Cu Superlattice chemistry.chemical_element Superlattice Electrode 02 engineering and technology Si Based Thin Film Magnetron Sputtering 010402 general chemistry 01 natural sciences law.invention law General Materials Science Electrical and Electronic Engineering Thin film Electrical conductor Renewable Energy Sustainability and the Environment business.industry Sputter deposition 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Anode chemistry Lithium-Ion Battery Electrode Optoelectronics Lithium 0210 nano-technology business |
| Zdroj: | Nano Energy. 76:105094 |
| ISSN: | 2211-2855 |
| DOI: | 10.1016/j.nanoen.2020.105094 |
| Popis: | Sustaining a sound structure in Si-based anodes is extremely challenging because of the high volumetric expansion that occurs upon cycling. To maintain capacity retention during the cycling, there is a need for new designs that rely on engineering-specific hierarchical geometries and/or optimized composite compositions such that at least one of the multiple elements serves as buffer and/or electron conductive pathway in the electrodes. Here, we report an innovative design in which alternate layers of atomic structures involving multiple elements form a new anode material for lithium-ion batteries.In this work, a superlattice-structured film containing Si, Mo, and Cu is fabricated by a simple and scalable magnetron sputtering process for the first time. With the help of the formation of a continuous and repetitive superlattice along the film thickness, a homogeneous stress-strain distribution is attained. In our superlattice thin film, the Si atoms are distributed along the film thickness within the alternate Mo-Cu layers, which act as inactive-conductive layers and as a backbone web to handle the volume expansion of active Si while restricting electrochemical agglomeration. This nano-functional superlattice approach enables harnessing the high energy density of Si while maintaining its structural stability. As a result, the electrode exhibits high energy density and capacity retention even at high cycling rates. The possible use of the film in a full cell is also evaluated using LiMn1.5Ni0.5O4 cathodes. The full cell maintained a stable capacity of about 900 mAh g(anode)(-1) (similar to 93 mA g(cathode)(-1)) over 150 cycles at the similar to 600 mA g(-1) rate.The remarkable performance of this nanostructured, multifunctional superlattice film is found to be promising for applications that require high energy, long calendar life, and excellent abuse tolerance, such as electric vehicle batteries. |
| Databáze: | OpenAIRE |
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