Failure modes of hollow core–shell structural active materials during the lithiation–delithiation process
MetadataShow full item record
Although they may improve the electrochemical performance of lithium-ion batteries, core–shell structural anode materials with high-capacity suffer from large volume expansion and dissolution during lithium-ion intercalation/extraction. To well understand these problems, failure modes are analyzed in core–shell structural active materials of a lithium-ion battery during the lithiation–delithiation process. Taking into account the lithium-ion concentration distribution along the direction of radius, the diffusion-induced stress field is calculated according to a perfectly elastic–plastic model. Based on the strain energy release rate, the critical sizes of core and shell for avoiding surface fracture and interface debonding are determined as a function of the state of charge. Furthermore, the three-dimensional phase diagram is constructed to demonstrate the relationship between the shell thickness, the outer radius of core, and the ratio of outer and inner radii.
Showing items related by title, author, creator and subject.
Fabrication of core-shell, yolk-shell and hollow Fe3O4@ carbon microboxes for high-performance lithium-ion batteriesTian, H.; Liu, H.; Yang, T.; Veder, J.; Wang, G.; Hu, M.; Wang, Shaobin; Jaroniec, M.; Liu, J. (2017)Metal oxide–carbon composites with core–shell, yolk–shell and hollow structures have attracted enormous interest because of their applications in lithium-ion batteries. However, the relationship between structure and ...
Wang, C.; Ma, Z.; Wang, Y.; Lu, Chunsheng (2016)The large volume change during lithium-ion insertion/extraction leads to huge stress and even failure of active materials. To well understand such a problem, the two-phase lithiation process of film and hollow core-shell ...
Wang, Y.; Ma, Z.; Lu, Chunsheng (2016)© 2016 Taylor & Francis. In this paper, we report a facile method to prepare a twins-structural Sn@C core–shell composite that is used as anode materials for lithium-ion batteries. Its surface morphology and microstructures ...