Li<sub>3</sub>N-Modified Garnet Electrolyte for All-Solid-State Lithium Metal Batteries Operated at 40 °C.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 30352159.
- Also identified by DOI 10.1021/acs.nanolett.8b03902.
- 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
Lithium carbonate on the surface of garnet blocks Li<sup>+</sup> conduction and causes a huge interfacial resistance between the garnet and electrode. To solve this problem, this study presents an effective strategy to reduce significantly the interfacial resistance by replacing Li<sub>2</sub>CO<sub>3</sub> with Li ion conducting Li<sub>3</sub>N. Compared to the surface Li<sub>2</sub>CO<sub>3</sub> on garnet, Li<sub>3</sub>N is not only a good Li<sup>+</sup> conductor but also offers a good wettability with both the garnet surface and a lithium metal anode. In addition, the introduction of a Li<sub>3</sub>N layer not only enables a stable contact between the Li anode and garnet electrolyte but also prevents the direct reduction of garnet by Li metal over a long cycle life. As a result, a symmetric lithium cell with this Li<sub>3</sub>N-modified garnet exhibits an ultralow overpotential and stable plating/stripping cyclability without lithium dendrite growth at room temperature. Moreover, an all-solid-state Li/LiFePO<sub>4</sub> battery with a Li<sub>3</sub>N-modified garnet also displays high cycling efficiency and stability over 300 cycles even at a temperature of 40 °C.