Kinetics-Controlled Degradation Reactions at Crystalline LiPON/Li(x)CoO(2) and Crystalline LiPON/Li-metal Interfaces
| Autor: | Gary W. Rubloff, Kevin Leung, Elliot J. Fuller, A. Alec Talin, Normand A. Modine, Alexander J. Pearse |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Battery (electricity)
Materials science General Chemical Engineering chemistry.chemical_element FOS: Physical sciences 02 engineering and technology Electrolyte 010402 general chemistry 01 natural sciences law.invention Metal law Environmental Chemistry General Materials Science Inert Condensed Matter - Materials Science Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Cathode 0104 chemical sciences Amorphous solid Anode General Energy chemistry Chemical engineering visual_art visual_art.visual_art_medium Lithium 0210 nano-technology |
| Popis: | Detailed understanding of solid-solid interface structure-function relations is critical for the improvement and wide deployment of all solid-state batteries. The interfaces between lithium phosphorous oxynitride ("LiPON") solid electrolyte material and lithium metal anode, between LiPON and Li(x)CoO(2) cathode surfaces, have been reported to generate solid electrolyte interphase ("SEI")-like products and/or disordered regions. Using electronic structure calculations and crystalline LiPON models with atomic-layer-deposition-like stoichiometry, we predict LiPON models with purely P-N-P backbones are kinetically inert towards lithium at room temperature. In contrast, transfer of oxygen atoms from low-energy Li(x)CoO(2) (104) surfaces to LiPON is much faster under ambient conditions. The mechanisms of the primary reaction steps, LiPON motifs that readily react with lithium metal, experimental results on amorphous LiPON to partially corroborate these predictions, and possible mitigation strategies to reduce degradations are discussed. LiPON interfaces are found to be useful case studies for highlighting the importance of kinetics-controlled processes during battery assembly at moderate processing temperatures. 35 pages, 9 figures |
| Databáze: | OpenAIRE |
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