Abstract
A polymer-assisted and solution-processed approach was employed to prepare and extract high-purity lithium metal microparticles (Li MPs) and lithium metal nanoflakes (Li NFs) at gram-scale. Two forms of metallic lithium anode were prepared based on the Li MPs and Li NFs – (1) CNT/lithium solid composite (CLSC) and (2) liquid-like polymer/lithium slurry (LPLS). The CLSC was integrated with commercial carbonate based electrolytes and showed dramatically improved overpotential and stability in both symmetric cell and LFP-based full cell compared to typical lithium foil. The LPLS was paired with ceramic electrolyte Li6.4La3Zr1.4Ta0.6O12(LLZTO) and ran at 1 mA/cm2and 1 mAh/cm2in a symmetric cell for 400 hours with overpotential as low as 150 mV. The facile method of preparing Li micro/nano-structures and the new forms of metallic lithium anodes are of great academic and industrial values.
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