Topological Li-SbF<sub>3</sub>@Cu Alloying Anode for High-Energy-Density Li Metal Batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40269584.
- Also identified by DOI 10.1002/adma.202501811.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The ultrathin Lithium (Li) alloying anode (≤ 50 µm) plays a key role in advancing rechargeable Li metal batteries into practical use, especially because of the insurmountable difficulties in developing pure Li anode. Herein, a thickness-controllable (≈5.5-30 µm) and topological Li-SbF<sub>3</sub>@Cu anode with the embedded dual Li-based (Li<sub>3</sub>Sb and Li-Cu) alloys and outmost LiF-rich layer is prepared for high-energy-density Li metal batteries under high Li utilization. Upon cycling, the surface LiF-rich layer together with inner lithiophilic Li<sub>3</sub>Sb sites and ferroconcrete-like Li-Cu skeletons, synergistically regulates the Li deposition/dissolution behaviors and Li/electrolyte interface evolution. The assembled Li-SbF<sub>3</sub>@Cu symmetric cell can cycle stably over 1200 h at 1 mA cm<sup>-2</sup>/1 mAh cm<sup>-2</sup>, and realize an ultrahigh discharge/charge depth of 53.6% at 2 mA cm<sup>-2</sup>/3 mAh cm<sup>-2</sup>. Moreover, a full cell with a high-Li-capacity LiCoO<sub>2</sub> cathode (3.8 mAh cm<sup>-2</sup>) delivers an energy density of 394.5 Wh kg<sup>-1</sup> with impressive cycling reversibility at a low negative/positive electrode capacity (N/P) ratio of 1.5. All the findings provide a rewarding avenue toward the industrial application of high-Li-utilization alloying anodes for practical high-energy-density Li metal batteries.