TY  - JOUR
AU  - Tsai, Chih-Long
AU  - Lan, Tu
AU  - Dellen, Christian
AU  - Ling, Yihan
AU  - Ma, Qianli
AU  - Fattakhova-Rohlfing, Dina
AU  - Guillon, Olivier
AU  - Tietz, Frank
TI  - Dendrite-tolerant all-solid-state sodium batteries and an important mechanism of metal self-diffusion
JO  - Journal of power sources
VL  - 476
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2020-03009
SP  - 228666 -
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000582482700022
DO  - DOI:10.1016/j.jpowsour.2020.228666
UR  - https://juser.fz-juelich.de/record/878691
ER  -