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Permanent Lithiophilic Layer for Anode-Free Lithium-Hydrogen Gas Battery
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DOI：10.1002/aenm.202501912.png)
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Abstract
En 中文
The necessity for high-performance energy storage systems propels extensive research into diverse battery technologies. Among them, the lithium-hydrogen gas (Li//H-2) battery, characterized by high energy density and low cost, is emerging as a promising candidate. Implementing a large areal capacity for the Li metal anode in an anode-free Li//H-2 battery design is essential for achieving higher energy density and further reducing manufacturing costs. Here the study reports a permanent Li-SiOx lithiophilic layer in-situ generated on a Cu substrate during the Li//H-2 battery initial charge that facilitates homogeneous Li nucleation and drives the formation of a dense and thick Li deposition layer. The study manages to maintain the lithiation state to avoid the repetition of lithiation/de-lithiation and significantly reduce the Li nucleation barrier. The anode-free Cu@Li-SiOx//H-2 battery with a high areal capacity of 5 mAh cm(-2) exhibits promising cycling stability with a Coulombic efficiency of up to 99.1% under a current density of 1 mA cm(-2). Moreover, the significantly reduced Li nucleation barrier results in an increased round-trip energy efficiency reaching up to 93.20%. This work proposes a novel strategy for constructing a lithiophilic layer to enhance the practical feasibility of large areal capacity anode-free Li//H-2 batteries.
Keywords:
anode-free
energy storage
Li//H-2 battery
lithiophilic layer
SiOx
Journal
IF:
26
Papers:
1.0W
Citations:
15.7W