Stabilizing Na-metal batteries with a manganese oxide cathode using a solid-state composite electrolyte
| Autor: | Jing Yu, Mohammed B. Effat, Junxiong Wu, Francesco Ciucci, Yu-Qi Lyu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Energy Engineering and Power Technology 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Ion Metal chemistry.chemical_compound law Deposition (phase transition) Electrical and Electronic Engineering Physical and Theoretical Chemistry Dissolution Renewable Energy Sustainability and the Environment 021001 nanoscience & nanotechnology Polyvinylidene fluoride Cathode 0104 chemical sciences Anode chemistry Chemical engineering visual_art Electrode visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Journal of Power Sources. 416:21-28 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2019.01.082 |
| Popis: | The dissolution of Mn ions from Mn-containing cathodes and the growth of Na dendrites are two critical issues that deteriorate the life time of Na batteries. In this work, we develop a novel solid-state composite-polymer-electrolyte based on a polyvinylidene fluoride matrix and Na3Zr2Si2PO12 fillers to simultaneously tackle these two problems. Elemental and morphology analysis show that the composite-polymer-electrolyte effectively impedes the dissolution and migration of Mn ions from the Na0.67MnO2 cathode as well as facilitates the uniform deposition of Na on the anode. A facile interface modification is applied to improve the contact between the composite-polymer-electrolyte and electrodes, which reduces the interfacial resistances and greatly delays the growth of Na dendrites. Consequently, the Na0.67MnO2/Na cell with the composite-polymer-electrolyte displays a significant improvement in cyclic stability and rate performance, without sacrificing the specific capacity, compared to that of a cell using an organic-liquid-electrolyte. Therefore, this work provides an effective way to improve the cycle life of Na batteries by stabilizing both electrodes with a composite-polymer-electrolyte and can be readily applied to other batteries, e.g. Li batteries. |
| Databáze: | OpenAIRE |
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