期刊
NANO LETTERS
卷 20, 期 4, 页码 2639-2646出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c00201
关键词
Li metal electrode; MXene; Dendrite; Lithium ion batteries
类别
资金
- Research Growth Initiative (RGI)
- UW System Applied Research Grant Program (ARG)
An inter-layer-calated thin Li metal (ILC-Li) electrode using nondelaminated 2D Ti3C2Tx MXene stacks (15 mu m) coated on a thin Li host (30 mu m) was developed. The excellent electrical conductivity and expanded interlayer space of the MXene provide a fast Car transport while the layer limits the Li Li growth along the perpendicular direction, thus largely mitigating the dendrite growth. The highly reversible Li deposition/extraction greatly reduces the dead lithium and electrolyte consumption by forming a thin solid-electrolyte-interphase (SEI) layer. A small overpotential of less than 135 mV in symmetric cells was achieved after >1050 cycles at 10 mA cm(-2) and 10 mAh cm(-2) . In a full cell, the battery exhibited an improved capacity retention when compared with Li foil, particularly with lean electrolyte of 2.5 mu L mAh(-1), thus leading to a high energy density up to 366.6 Wh/kg. The current approach is manufacture scalable, which displays promising potentials in lithium ion batteries.
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