TY - JOUR
T1 - A stable cathode-solid electrolyte composite for high-voltage, long-cycle-life solid-state sodium-ion batteries
AU - Wu, Erik A.
AU - Banerjee, Swastika
AU - Tang, Hanmei
AU - Richardson, Peter M.
AU - Doux, Jean Marie
AU - Qi, Ji
AU - Zhu, Zhuoying
AU - Grenier, Antonin
AU - Li, Yixuan
AU - Zhao, Enyue
AU - Deysher, Grayson
AU - Sebti, Elias
AU - Nguyen, Han
AU - Stephens, Ryan
AU - Verbist, Guy
AU - Chapman, Karena W.
AU - Clément, Raphaële J.
AU - Banerjee, Abhik
AU - Meng, Ying Shirley
AU - Ong, Shyue Ping
N1 - Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12/1
Y1 - 2021/12/1
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/85101554513
U2 - 10.1038/s41467-021-21488-7
DO - 10.1038/s41467-021-21488-7
M3 - Article
C2 - 33623048
AN - SCOPUS:85101554513
SN - 2041-1723
VL - 12
JO - Nature Communications
JF - Nature Communications
IS - 1
M1 - 1256
ER -