Interfacial Fracture of Nanowire Electrodes of Lithium-Ion Batteries Academic Article

abstract

• 2017, The Minerals, Metals & Materials Society. Nanowires (NW) have emerged as a promising design for high power-density lithium-ion battery (LIB) electrodes. However, volume changes during cycling can lead to fracture of the NWs. In this paper, we investigate a particularly detrimental form of fracture: interfacial detachment of the NW from the current collector (CC). We perform finite element simulations to calculate the energy release rates of NWs during lithiation as a function of geometric parameters and mechanical properties. The simulations show that the energy release rate of a surface crack decreases as it propagates along the NW/CC interface toward the center of the NW. Moreover, this paper demonstrates that plastic deformation in the NWs drastically reduces stresses and thus crack-driving forces, thereby mitigating interfacial fracture. Overall, the results in this paper provide design guidelines for averting NW/CC interfacial fractures during operation of LIBs.

authors

• Pharr, Matt

published proceedings

• JOM

author list (cited authors)

• Hardin, G. R., Zhang, Y., Fincher, C. D., & Pharr, M.

citation count

• 13

complete list of authors

• Hardin, GR||Zhang, Y||Fincher, CD||Pharr, M

publication date

• September 2017

publisher

• Springer Nature  Publisher

keywords

• 40 Engineering
• 4016 Materials Engineering
• 7 Affordable And Clean Energy

Digital Object Identifier (DOI)

• 10.1007/s11837-017-2411-x

start page

• 1519

end page

• 1523

volume

• 69

issue

• 9

URL

• http://dx.doi.org/10.1007/s11837-017-2411-x

user-defined tag

• 7 Affordable and Clean Energy