A high performance ceramic-polymer separator for lithium batteries
| Autor: | Padmakar Kichambare, Jitendra Kumar, Amarendra K. Rai, Stanley J. Rodrigues, R. S. Bhattacharya, Guru Subramanyam |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Analytical chemistry Energy Engineering and Power Technology Separator (oil production) 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Electron beam physical vapor deposition 0104 chemical sciences chemistry.chemical_compound Membrane Chemical engineering chemistry visual_art visual_art.visual_art_medium Ionic conductivity Ceramic Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Polarization (electrochemistry) Ethylene carbonate |
| Zdroj: | Journal of Power Sources. 301:194-198 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2015.09.117 |
| Popis: | A three-layered (ceramic-polymer-ceramic) hybrid separator was prepared by coating ceramic electrolyte [lithium aluminum germanium phosphate (LAGP)] over both sides of polyethylene (PE) polymer membrane using electron beam physical vapor deposition (EB-PVD) technique. Ionic conductivities of membranes were evaluated after soaking PE and LAGP/PE/LAGP membranes in a 1 Molar (1M) lithium hexafluroarsenate (LiAsF6) electrolyte in ethylene carbonate (EC), dimethyl carbonate (DMC) and ethylmethyl carbonate (EMC) in volume ratio (1:1:1). Scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were employed to evaluate morphology and structure of the separators before and after cycling performance tests to better understand structure-property correlation. As compared to regular PE separator, LAGP/PE/LAGP hybrid separator showed: (i) higher liquid electrolyte uptake, (ii) higher ionic conductivity, (iii) lower interfacial resistance with lithium and (iv) lower cell voltage polarization during lithium cycling at high current density of 1.3 mA cm−2 at room temperature. The enhanced performance is attributed to higher liquid uptake, LAGP-assisted faster ion conduction and dendrite prevention. Optimization of density and thickness of LAGP layer on PE or other membranes through manipulation of PVD deposition parameters will enable practical applications of this novel hybrid separator in rechargeable lithium batteries with high energy, high power, longer cycle life, and higher safety level. |
| Databáze: | OpenAIRE |
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