TY  - JOUR
A1  - Robinson, JB
A1  - Heenan, TMM
A1  - Jervis, JR
A1  - Tan, C
A1  - Kendrick, E
A1  - Brett, DJL
A1  - Shearing, PR
JF  - Journal of Power Sources
KW  - Thermal runaway; Na-ion battery; X-ray computed tomography; microstructural analysis; battery failure; accelerating rate calorimetry
SP  - 360
VL  - 400
N1  - © 2018 This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
UR  - http://dx.doi.org/10.1016/j.jpowsour.2018.07.098
EP  - 368
ID  - discovery10058678
N2  - In recent years, the ability to examine the processes that cause the catastrophic failure of batteries as a result of thermal runaway has improved substantially. In this work, the effect of thermal runaway on the microstructure of the electrodes of a Na-ion battery is examined using X-ray computed tomography for the first time. The thermal failure induced via accelerating rate calorimetry enabled the examination of failed electrodes, which were subsequently compared with fresh samples. Pre- and post-mortem microstructural analysis shows changes in both electrodes as a result of the thermal runaway process at the micrometre length-scale. It is seen that the cathode shows the largest changes in structure, with the anode remaining morphologically similar post-failure at the sub-micron length-scale. The formation of a highly X-ray attenuating layer, which is proposed to be a metallic product of the thermal runaway reaction, is observed, indicating that the thermal runaway mechanisms which occur in Na-ion batteries may be similar to those reported for Li-ion systems.
AV  - public
SN  - 0378-7753
Y1  - 2018/10/01/
TI  - Multiscale tomographic analysis of the thermal failure of Na-Ion batteries
ER  -