Pure bulk ion-conducting membrane for high-energy-density batteries
| Autor: | Jung O. Park, Toshinori Sugimoto, Hyunjin Kim, Heung C. Lee, Dong-Joon Lee, Shintaro Kitajima, Youngeal Kim, Hyuk Jae Kwon, Seong Yeon Park, Mokwon Kim, Dongmin Im, Hyunpyo Lee, Tae Y. Kim, Wonsung Choi, Kyoung Hwan Choi, Jung-Hwa Kim |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Oxide Energy Engineering and Power Technology Ionic bonding 02 engineering and technology Activation energy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Membrane Chemical engineering chemistry Fast ion conductor Specific energy Ionic conductivity Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Lithium–air battery |
| Zdroj: | Journal of Power Sources. 482:229025 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2020.229025 |
| Popis: | Solid electrolytes (SE) are key components for the safe and continuous operation of high-energy lithium metal batteries. Metal oxide SEs, which are stable under ambient conditions, are used as separators in the form of thick and heavy plates; however, this reduces the specific energy of practical battery cells. Despite considerable efforts, the development of thin SE separators with high ionic conductivities has remained a significant challenge. This paper reports the scalable production of a thin membrane comprising single-crystal SE particles that are bicontinuously embedded in a polymer matrix to form ion-conducting channels. The membrane exhibits a high ionic conductivity of 6.0 × 10−4 S cm−1 with remarkably low activation energy (20-times greater than that of current membranes with polycrystalline SE particles), eliminating large grain boundary resistances. The high conductivity enables stable lithium metal stripping and plating, producing a homogeneous ion flow to the lithium metal. Furthermore, a lithium metal–air battery cell using the membrane demonstrates a high specific energy of 700 Wh kg−1. |
| Databáze: | OpenAIRE |
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