Regulated lithium ionic flux through well-aligned channels for lithium dendrite inhibition in solid-state batteries

Li, Yang; Cao, Daxian; Arnold, William; Ren, Yao; Liu, Chao; Jasinski, Jacek B.; Druffel, Thad; Cao, Ye; Zhu, Hongli; Wang, Hui

doi:10.1016/j.ensm.2020.06.029

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Regulated lithium ionic flux through well-aligned channels for lithium dendrite inhibition in solid-state batteries

Li, Yang·Cao, Daxian·Arnold, William·Ren, Yao·Liu, Chao·Jasinski, Jacek B.·Druffel, Thad·Cao, Ye·Zhu, Hongli·Wang, Hui

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Abstract

The utilization of solid electrolyte (SE) to suppress lithium (Li) dendrites is promising but still far from satisfactory due to the inhomogeneous Li plating/stripping. In this paper, we demonstrated a novel strategy to inhibit Li dendrites via regulating Li-ion flux in SE by using vertically aligned channels. The ion-insulating walls facilitated uniform distribution of Li-ion flux through the channels, leading to a homogeneous Li deposition, thus alleviating Li dendrite formation. As a result, symmetric cells with this SE exhibited excellent long-term stability (1000 h) against Li metal. In addition, Li4Ti5O12 (LTO)/Li cell with the developed SE achieved good battery performance over 100 cycles. The mechanism for dendrite suppression was further investigated by phase-field simulation. This work provides a novel strategy by manipulating uniform Li-ion flux to fabricate SE to inhibit Li dendrites and facilitates the development of high-performance rechargeable Li batteries.

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25 ENERGY STORAGE 36 MATERIALS SCIENCE 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY Li dendrite inhibition Li metal battery aligned channels chemistry materials science regulated Li-ion flux science & technology solid electrolyte stable cycling

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Li, Yang, Cao, Daxian, Arnold, William, Ren, Yao, Liu, Chao, Jasinski, Jacek B., Druffel, Thad, Cao, Ye, Zhu, Hongli, Wang, Hui. 2020-07-06. Regulated lithium ionic flux through well-aligned channels for lithium dendrite inhibition in solid-state batteries. https://doi.org/10.1016/j.ensm.2020.06.029

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