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Pagot G, Di Noto V, Vezzù K, Barbiellini B, Toso V, Caruso A, Zheng M, Li X, Ferragut R. Quantum view of Li-ion high mobility at carbon-coated cathode interfaces. iScience 2022; 26:105794. [PMID: 36594017 PMCID: PMC9803833 DOI: 10.1016/j.isci.2022.105794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 11/05/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022] Open
Abstract
Lithium-ion batteries (LIBs) are among the most promising power sources for electric vehicles, portable electronics and smart grids. In LIBs, the cathode is a major bottleneck, with a particular reference to its low electrical conductivity and Li-ion diffusivity. The coating with carbon layers is generally employed to enhance the electrical conductivity and to protect the active material from degradation during operation. Here, we demonstrate that this layer has a primary role in the lithium diffusivity into the cathode nanoparticles. Positron is a useful quantum probe at the electroactive materials/carbon interface to sense the mobility of Li-ion. Broadband electrical spectroscopy demonstrates that only a small number of Li-ions are moving, and that their diffusion strongly depends on the type of carbon additive. Positron annihilation and broadband electrical spectroscopies are crucial complementary tools to investigate the electronic effect of the carbon phase on the cathode performance and Li-ion dynamics in electroactive materials.
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Affiliation(s)
- Gioele Pagot
- Section of Chemistry for the Technology (ChemTech), Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy,Corresponding author
| | - Vito Di Noto
- Section of Chemistry for the Technology (ChemTech), Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy,Corresponding author
| | - Keti Vezzù
- Section of Chemistry for the Technology (ChemTech), Department of Industrial Engineering, University of Padova, Via Marzolo 9, 35131 Padova, Italy
| | - Bernardo Barbiellini
- Physics Department, School of Engineering Science, LUT-University, 53851 Lappeenranta, Finland,Department of Physics, Northeastern University, Boston, MA 02115, USA
| | - Valerio Toso
- L-NESS and Department of Physics, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy,INFN Milan Unit, Via Celoria 16, 20133 Milano, Italy
| | - Alberto Caruso
- L-NESS and Department of Physics, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
| | - Meiying Zheng
- Physics Department, School of Engineering Science, LUT-University, 53851 Lappeenranta, Finland,L-NESS and Department of Physics, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
| | - Xin Li
- Physics Department, School of Engineering Science, LUT-University, 53851 Lappeenranta, Finland,L-NESS and Department of Physics, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy
| | - Rafael Ferragut
- L-NESS and Department of Physics, Politecnico di Milano, Via Anzani 42, 22100 Como, Italy,INFN Milan Unit, Via Celoria 16, 20133 Milano, Italy,Corresponding author
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