Stable Electrochemical Li Plating/Stripping Behavior by Anchoring MXene Layers on Three-Dimensional Conductive Skeletons
- 26 August 2020
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 12 (34), 37967-37976
- https://doi.org/10.1021/acsami.0c05244
Abstract
The ultrahigh specific capacity of lithium (Li) metal makes it possible to serve as the ultimate candidate for an anode in high-energy density secondary batteries, whereas the safety hazards caused by Li dendrite growth severely hamper the commercialization process of a lithium metal anode. Here, we propose a 3D conductive skeleton by anchoring MXene on Cu foam (MXene@CF) to significantly improve the electrochemical Li plating/stripping behavior. Li metal tends to nucleate uniformly and grow horizontally along the MXene nanosheets under the strong Coulomb interaction between adsorbed Li and MXene. Moreover, the abundant fluorine termination groups in MXene contribute to forming a stable fluorinated solid electrolyte interphase (SEI) and thus effectively regulating the Li deposition behaviors and prolonging the stability of the Li metal anode. Therefore, the MXene@CF skeleton maintains a high Coulombic efficiency (CE) of 98.5% after 200 cycles at 1 mA cm(-2). The MXene@CF-based symmetric cells can run for more than 1000 h without intense voltage fluctuation and demonstrates remarkable deep charge/discharge abilities. The MXene@CF-Li/LiFePO4 full cell exhibits outstanding long-term cycling stability (95% capacity retention after 300 cycles). Our research suggests that MXene could effectively regulate the Li plating behavior that might provide a feasible solution for a dendrite-free Li anode.Funding Information
- Natural Science Foundation of Hebei Province (B2018203330, B2018203360)
- National Natural Science Foundation of China (51674221, 517404261)
This publication has 48 references indexed in Scilit:
- In situ construction of nitrogen-doped graphene with surface-grown carbon nanotubes as a multifactorial synergistic catalyst for oxygen reductionCarbon, 2019
- Toward Safe Lithium Metal Anode in Rechargeable Batteries: A ReviewChemical Reviews, 2017
- Advances in understanding mechanisms underpinning lithium–air batteriesNature Energy, 2016
- High-power all-solid-state batteries using sulfide superionic conductorsNature Energy, 2016
- Critical Challenges in Rechargeable Aprotic Li–O2 BatteriesAdvanced Energy Materials, 2016
- Why do batteries fail?Science, 2016
- Smaller Sulfur Molecules Promise Better Lithium–Sulfur BatteriesJournal of the American Chemical Society, 2012
- Challenges Facing Lithium Batteries and Electrical Double‐Layer CapacitorsAngewandte Chemie, 2012
- Challenges for Rechargeable Li BatteriesChemistry of Materials, 2009
- A highly ordered nanostructured carbon–sulphur cathode for lithium–sulphur batteriesNature Materials, 2009