Efficient Lithium Dendrite Control and Intimate Li/Garnet Interface Built Through Carbonized Metal-Organic Framework Layer

• DOI: 10.2139/ssrn.4635728
• Publication Date: 2023-11-16T23:20:27Z
• Authors: Guoxu Wang; Chengbiao Wei; Xiaoyan Liu; Wei Ding
• Keywords: Lithium metal; Interface (matter); Dendrite (mathematics)

Solid garnet electrolyte-based lithium metal batteries with electrochemical stability and high ionic conductivity are ideal electrolyte materials for the next generation of high-energy devices. However, limited interfacial contact between anode, huge volume change anode during successive lithium-ion plating/stripping processes limit their application. Here, we demonstrated an exceedingly simple effective strategy simultaneously restricting ensuring intimate at lithium/garnet interface through a carbonized metal-organic framework (CMOF) layer. The abundant Zn clusters in CMOF layer interact molten Li (Li-CMOF) to form tight Li6.75La3Zr1.75Ta0.25O12 (LLZTO) pellet serves as nucleation sites guide deposition, which ensures homogeneous distribution electric field fluxes, avoiding formation dendrites. As result, Li-CMOF/LLZTO/Li-CMOF symmetric cell can be steadily cycled more than 1000 h without short-circuiting 0.1 mA cm-2/0.1 mAh cm-2 Li-CMOF/LLZTO/NCM811 exhibit superior cycling 0.5C 100 cycles. This work provides new improve wettability endure via coated on surface electrolyte.