Journal
ACS APPLIED MATERIALS & INTERFACES
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c13359
Keywords
lean Li-metal anode; electroless Ni-P plating method; current collector; surface modification; homogeneous deposition; dendrite-free; SEI
Funding
- Guangdong Basic and Applied Basic Research Foundation
- Shenzhen Science and Technology Program
- Tsinghua Shenzhen International Graduate School
- [2019A1515110530]
- [2022A1515010486]
- [JCYJ20210324140804013]
- [QD2021005N]
- [JC2021007]
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By depositing a thin and uniform layer of Ni-P complex on a Cu current collector, the lithiophilicity of the collector is greatly improved, reducing the Li nucleation overpotential and suppressing Li dendrite growth. This surface modification method shows promise in developing a stable and cost-effective anode current collector for lean Li-metal batteries.
The compatibility of current collectors with reactive Li is key to inducing stable Li cycling and prolonged cycle life of lean Li-metal batteries. Herein, a thin and uniform layer of Ni-P complex was built on the surface of a Cu current collector (NiP@Cu) via an efficient, controllable, and cost-effective electroless plating method. The thickness, morphology, composition, and roughness of the Ni-P deposition were successfully regulated. Lithiophilicity of the current collector was greatly improved by Ni-P deposition, which effectively reduced the Li nucleation overpotential and suppressed the Li dendrite growth. In addition, NiP@Cu promoted an inorganic LiF/ Li3P-rich solid electrolyte interphase to facilitate interfacial charge transfer and eliminate excessive side reactions between Li and the electrolyte. As a result, the Coulombic efficiency of half-cells remained above 98.5% for more than 400 cycles at 0.5 mA/cm2 and 98.2% for more than 250 cycles at 1 mA/cm2. Full cells with NiP@Cu also showed superior performance compared to those with bare Cu. This work proposes a promising surface modification method to develop a stable, dendrite-free, and cost-effective anode current collector for high-energy-density lean Li-metal batteries.
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