Stress-enhanced lithiation in MAX compounds for battery applications
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
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AbstractLi-ion batteries are well-established energy storage systems. Upon lithiation conventional group IVA compound anodes undergo large volume expansion and thus suffer from stress-induced performance degradation. Instead of the emerging MXene anodes fabricated by an expensive and difficult-to-control etching technique, we study the feasibility of utilizing the parent MAX compounds. We reveal that M2AC (M=Ti, V and A=Si, S) compounds repel lithiation at ambient conditions, while structural stress turns out to support lithiation, in contrast to group IVA compounds. For V2SC the Li diffusion barrier is found to be lower than reported for group IVA compound anodes, reflecting potential to achieve fast charge/discharge.
CitationZhu J, Chroneos A, Wang L, Rao F, Schwingenschlögl U (2017) Stress-enhanced lithiation in MAX compounds for battery applications. Applied Materials Today 9: 192–195. Available: http://dx.doi.org/10.1016/j.apmt.2017.07.002.
SponsorsThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST). This work was supported by the National Natural Science Foundation of China (61622408).
JournalApplied Materials Today