Na 3 NH 2 B 12 H 12 as high performance solid electrolyte for all-solid-state Na-ion batteries
(2018) Journal of Power Sources — Vol. 396, n° 1, p. 574-579 (2018)
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- 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 593 K and excellent electrochemical stable window up to 10 V (vs. Na+/Na). It demonstrates a high Na+ conductivity of 1.0 × 10−4 S cm-1 at a temperature of 372 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 353 K and a rate of 0.1 C. This work opens the gate to develop advanced solid electrolytes via combination of metal amides with closo borates.
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Citations
He, L., Lin, H., Li, H.-F., Filinchuk, Y., Zhang, J., Liu, Y., Yang, M., Hou, Y., Deng, Y., Li, H.-W., Shao, H., Wang, L., & Lu, Z. (2018). Na 3 NH 2 B 12 H 12 as high performance solid electrolyte for all-solid-state Na-ion batteries. Journal of Power Sources, 396(1), 574-579. https://doi.org/10.1016/j.jpowsour.2018.06.054 (Original work published 2018)