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Growing single-crystalline seeds on lithiophobic substrates to enable fast-charging lithium-metal batteries
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Growing single-crystalline seeds on lithiophobic substrates to enable fast-charging lithium-metal batteries
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Growing single-crystalline seeds on lithiophobic substrates to enable fast-charging lithium-metal batteries
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Journal Article
Growing single-crystalline seeds on lithiophobic substrates to enable fast-charging lithium-metal batteries
2023
Overview
Controlling the nucleation and growth of lithium metal is essential for realizing fast-charging batteries. Here we report the growth of single-crystalline seeds that results in the deposition of dense lithium, even at high current densities. Contrary to the widely accepted practice of using a lithiophilic surface to achieve dendrite-free deposition, we employ a lithiophobic surface made of a nanocomposite of LiF and Fe to deposit hexagonal crystals, which induce subsequent dense lithium deposition. The nanocomposites have uniform Fe sites for nucleation while LiF enables rapid lithium transport. A cell using a 3 mAh cm
−2
LiNi
0.8
Co
0.1
Mn
0.1
O
2
(LiNMC811) cathode, onefold excess of lithium and 3 g Ah
−1
electrolyte cycles at a 1 C rate for more than 130 cycles with 80% capacity retention, a 550% improvement over the baseline cells. Our findings advance the understanding of lithium nucleation and pave the way for realizing high-energy, fast-charging Li-metal batteries.
Controlling the nucleation and growth is essential for enabling long-life Li-metal batteries. Here the authors report the growth of faceted single-crystalline Li seeds on a lithiophobic Fe/LiF composite substrate that enables dense Li deposition under fast-charging conditions.
