%0 Journal Article
%A Tsai, Chih-Long
%A Lan, Tu
%A Dellen, Christian
%A Ling, Yihan
%A Ma, Qianli
%A Fattakhova-Rohlfing, Dina
%A Guillon, Olivier
%A Tietz, Frank
%T Dendrite-tolerant all-solid-state sodium batteries and an important mechanism of metal self-diffusion
%J Journal of power sources
%V 476
%@ 0378-7753
%C New York, NY [u.a.]
%I Elsevier
%M FZJ-2020-03009
%P 228666 -
%D 2020
%X Inhibition of dendrite growth in all-solid-state lithium batteries (ASSLBs) has long been a challenge to the field.In the present study, the conditions for dendrite growth for a similar but less mature technology, all-solid-statesodium batteries (ASSNBs), are investigated. By simply sticking sodium metal to Na3.4Zr2(SiO4)2.4(PO4)0.6(NZSP) ceramic pellets and without applying external pressure during operation, the critical current density ofNa/NZSP/Na symmetric ASSNBs reaches 9 mA cm􀀀 2 at 25 ◦C. The cells can be stably operated at an areal capacityof 5 mAh cm􀀀 2 (per half cycle, with 1.0 mA cm􀀀 2) at 25 ◦C for 300 h in a galvanostatic cycling measurementwithout any dendrite formation. The results outperform the existing ASSLBs and ASSNBs, and also gobeyond satisfying the requirements for practical applications. The influence of the high metal self-diffusioncoefficient on the dendritic plating/stripping is regarded as the most likely reason for the high dendrite toleranceof ASSNBs. A mathematical model based on Fick’s second law was applied as a first approximation toillustrate this influence. Full ASSNBs were fabricated with infiltrated Na3V2(PO4)3 (NVP) as the cathode and canbe stably operated with a capacity of 0.60 mAh cm􀀀 2 at high rate of 0.5 mA cm􀀀 2 at room temperature.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000582482700022
%R 10.1016/j.jpowsour.2020.228666
%U https://juser.fz-juelich.de/record/878691