Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 8, Issue 12, Pages 3589-3596Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ee01941a
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Funding
- UNIST (Ulsan National Institute of Science and Technology) [1.150034.01]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2014R1A1A2A16053515]
- National Research Foundation of Korea (NRF) by the Ministry of Science, ICT & Future Planning (MSIP) [2013R1A2A1A01015911]
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Development of Na-ion battery electrolyte with high-performance electrochemical properties and high safety is still challenging to achieve. In this study, we report on a NASICON (Na3Zr2Si2PO12)-based composite hybrid solid electrolyte (HSE) designed for use in a high safety solid-state sodium battery for the first time. The composite HSE design yields the required solid-state electrolyte properties for this application, including high ionic conductivity, a wide electrochemical window, and high thermal stability. The solid-state batteries of half-cell type exhibit an initial discharge capacity of 330 and 131 mA h g(-1) for a hard carbon anode and a NaFePO4 cathode at a 0.2C-rate of room temperature, respectively. Moreover, a pouch-type flexible solid-state full-cell comprising hard carbon/HSE/NaFePO4 exhibits a highly reversible electrochemical reaction, high specific capacity, and a good, stable cycle life with high flexibility.
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