Journal
ENERGY STORAGE MATERIALS
Volume 31, Issue -, Pages 344-351Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2020.06.029
Keywords
Regulated U-Ion flux; Aligned channels; Li dendrite inhibition; Solid electrolyte; Stable cycling; U metal battery
Funding
- Conn Center for Renewable Energy Research
- EVPRI Internal Grant of the University of Louisville
- U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Vehicle Technologies Office [DE-EE0008866]
- NASA Kentucky under NASA award [NNX15AR69H]
- National Science Foundation [1924534, 1933051]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1924534] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1933051] Funding Source: National Science Foundation
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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. Here, 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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