Abstract
An inter-layer-calated thin Li metal (ILC-Li) electrode using nondelaminated 2D Ti 3C 2T x MXene stacks (15 μm) coated on a thin Li host (30 μm) was developed. The excellent electrical conductivity and expanded interlayer space of the MXene provide a fast e -/Li + transport while the layer limits the 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 μL 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.
Original language | English |
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Pages (from-to) | 2639-2646 |
Number of pages | 8 |
Journal | Nano Letters |
Volume | 20 |
Issue number | 4 |
Early online date | 17 Mar 2020 |
DOIs | |
Publication status | Published - 8 Apr 2020 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:Copyright © 2020 American Chemical Society.
Funding
All authors acknowledge the support from the Research Growth Initiative (RGI) and UW System Applied Research Grant Program (ARG).
Keywords
- Dendrite
- Li metal electrode
- Lithium ion batteries
- MXene