材料科学
电解质
阳极
法拉第效率
阴极
电化学
氧化物
离子电导率
快离子导体
化学工程
复合数
电极
化学
复合材料
冶金
物理化学
工程类
作者
Erik A. Wu,Somesh Banerjee,Hanmei Tang,Peter M. Richardson,Jean-Marie Doux,Ji Qi,Zhuoying Zhu,Antonin Grenier,Yixuan Li,Enyue Zhao,Grayson Deysher,Elias Sebti,Han Nguyen,Ryan M. Stephens,G. Verbist,Karena W. Chapman,Raphaële J. Clément,Abhik Banerjee,Ying Shirley Meng,Shyue Ping Ong
标识
DOI:10.1038/s41467-021-21488-7
摘要
Rechargeable solid-state sodium-ion batteries (SSSBs) hold great promise for safer and more energy-dense energy storage. However, the poor electrochemical stability between current sulfide-based solid electrolytes and high-voltage oxide cathodes has limited their long-term cycling performance and practicality. Here, we report the discovery of the ion conductor Na3-xY1-xZrxCl6 (NYZC) that is both electrochemically stable (up to 3.8 V vs. Na/Na+) and chemically compatible with oxide cathodes. Its high ionic conductivity of 6.6 × 10-5 S cm-1 at ambient temperature, several orders of magnitude higher than oxide coatings, is attributed to abundant Na vacancies and cooperative MCl6 rotation, resulting in an extremely low interfacial impedance. A SSSB comprising a NaCrO2 + NYZC composite cathode, Na3PS4 electrolyte, and Na-Sn anode exhibits an exceptional first-cycle Coulombic efficiency of 97.1% at room temperature and can cycle over 1000 cycles with 89.3% capacity retention at 40 °C. These findings highlight the immense potential of halides for SSSB applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI