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Solid-to-liquid transition of polycarbonate solid electrolytes in Li-metal batteries
- Source :
- Journal of Power Sources. 436:226852
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- In this work, we analyzed the thermal stability of polycarbonate: lithium trifluoromethane sulphonylimide (LiTFSI) systems. Polyethylene carbonate (PEC) and polypropylene carbonate (PPC) undergo depolymerization to ethylene carbonate (EC) and propylene carbonate (PC), respectively, in the presence of Li salt under annealing treatment. The decomposition reaction can explain the surprising high ionic conductivity recently reported for solid polymer electrolyte (SPE) polycarbonate-based systems. Because this phenomenon can strongly impact the results of SPE research, it is essential to control the depolymerization of polymers to avoid inaccurate electrochemical performance. In addition, we observed that the standard drying procedure for the preparation of high-salt-concentration polymer (polymer-in-salt) SPEs traps a high amount of residual solvent, e.g., acetonitrile (ACN), due to the strong bond between the solvent and ionic species. This finding represents another factor influencing the remarkably high ionic conductivity.
- Subjects :
- Materials science
Renewable Energy, Sustainability and the Environment
Depolymerization
Energy Engineering and Power Technology
Ionic bonding
02 engineering and technology
Electrolyte
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
chemistry.chemical_compound
chemistry
Chemical engineering
visual_art
Propylene carbonate
Polypropylene carbonate
visual_art.visual_art_medium
Ionic conductivity
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Polycarbonate
0210 nano-technology
Ethylene carbonate
Subjects
Details
- ISSN :
- 03787753
- Volume :
- 436
- Database :
- OpenAIRE
- Journal :
- Journal of Power Sources
- Accession number :
- edsair.doi...........75aaee2bf4f78114aa42c6b4148d7969