Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7725220 | Journal of Power Sources | 2018 | 6 Pages |
Abstract
Solid electrolyte with stable and fast Na+ ionic conductivity is of central importance in the development of all-solid-state sodium batteries. Here we present a novel Na+ conductor based on complex hydrides with composition of Na3NH2B12H12. It exhibits remarkable thermal stability up to 593â¯K and excellent electrochemical stable window up to 10â¯V (vs. Na+/Na). It demonstrates a high Na+ conductivity of 1.0â¯Ãâ¯10â4â¯Sâ¯cm-1â¯at a temperature of 372â¯K, which is much higher than those of its precursors NaNH2 and Na2B12H12. All-solid-state Na-ion batteries were constructed by employing the obtained Na3NH2B12H12 as electrolyte, TiS2 as cathode and sodium foil as anode, which can reversibly discharge/charge for over 200 cycles with more than 50% capacity retention at temperature of 353â¯K and a rate of 0.1â¯C. This work opens the gate to develop advanced solid electrolytes via combination of metal amides with closo borates.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Liqing He, Huaijun Lin, Hai-Feng Li, Yaroslav Filinchuk, Junjun Zhang, Ying Liu, Mingyang Yang, Yan Hou, Yonghong Deng, Hai-Wen Li, Huaiyu Shao, Liping Wang, Zhouguang Lu,