Reducing Gases Triggered Cathode Surface Reconstruction for Stable Cathode-Electrolyte Interface in Practical All-Solid-State Lithium Batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37849022.
- Also identified by DOI 10.1002/adma.202305748.
- 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 interfacial compatibility between cathodes and sulfide solid-electrolytes (SEs) is a critical limiting factor of electrochemical performance in all-solid-state lithium-ion batteries (ASSLBs). This work presents a gas-solid interface reduction reaction (GSIRR), aiming to mitigate the reactivity of surface oxygen by inducing a surface reconstruction layer (SRL) . The application of a SRL, CoO/Li<sub>2</sub> CO<sub>3</sub> , onto LiCoO<sub>2</sub> (LCO) cathode results in impressive outcomes, including high capacity (149.7 mAh g<sup>-1</sup> ), remarkable cyclability (retention of 84.63% over 400 cycles at 0.2 C), outstanding rate capability (86.1 mAh g<sup>-1</sup> at 2 C), and exceptional stability in high-loading cathode (28.97 and 23.45 mg cm<sup>-2</sup> ) within ASSLBs. Furthermore, the SRL CoO/Li<sub>2</sub> CO<sub>3</sub> enhances the interfacial stability between LCO and Li<sub>10</sub> GeP<sub>2</sub> S<sub>12</sub> as well as Li<sub>3</sub> PS<sub>4</sub> SEs. Significantly, the experiments suggest that the GSIRR mechanism can be broadly applied, not only to LCO cathodes but also to LiNi<sub>0.8</sub> Co<sub>0.1</sub> Mn<sub>0.1</sub> O<sub>2</sub> cathodes and other reducing gases such as H<sub>2</sub> S and CO, indicating its practical universality. This study highlights the significant influence of the surface chemistry of the oxide cathode on interfacial compatibility, and introduces a surface reconstruction strategy based on the GSIRR process as a promising avenue for designing enhanced ASSLBs.