Stable Lithium Anodes Enabled by the Hardening and High Li<sup>+</sup> Flux Interlayer.
basic_science · Level V
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- Record sourced from PubMed, PMID 40424508.
- Also identified by DOI 10.1021/acs.nanolett.5c01606.
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Abstract
The commercial use of lithium metal batteries is greatly limited by dendrite formation and slow Li<sup>+</sup> transport at the anode-electrolyte interface. Herein, the constructed high-modulus polymer interlayer suppressed the Li dendrite formation, leading to dense deposition and enhanced Li<sup>+</sup> transport. Meanwhile, this formed robust organic solid-electrolyte interphase inhibited the side reactions occurring at the anode-electrolyte interface while promoting a high Li<sup>+</sup> flux. By constructing the polymer interlayer, the Li@P3DDT||Li@P3DDT symmetric cells demonstrated an impressive stability lifespan of over 3400 h at 1 mA/cm<sup>2</sup> and 1 mAh/cm<sup>2</sup>. The LFP||Li@P3DDT full cells exhibit a remarkable capacity retention of 85.0% over 300 cycles at 4 C. Furthermore, the 50 μm Li@P3DDT||LiCoO<sub>2</sub> pouch cell with 380 Wh kg<sup>-1</sup> maintained over 99.9% retention of capacity over 60 cycles at 0.5 C. The research paves the way for the advancement of stable lithium anodes.