Nb<sub>1.60</sub>Ti<sub>0.32</sub>W<sub>0.08</sub>O<sub>5-δ</sub> as negative electrode active material for durable and fast-charging all-solid-state Li-ion batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39396046.
- Also identified by DOI 10.1038/s41467-024-52767-8 and PMC identifier 11470961.
- Licence recorded as CC BY-NC-ND.
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Abstract
Li-based all-solid-state batteries (ASSBs) are considered feasible candidates for the development of the next generation of high-energy rechargeable batteries. However, ASSBs are detrimentally affected by a limited rate capability and inadequate performance at high currents. To circumvent these issues, here we propose the use of Nb<sub>1.60</sub>Ti<sub>0.32</sub>W<sub>0.08</sub>O<sub>5-δ</sub> (NTWO) as negative electrode active material. NTWO is capable of overcoming the limitation of lithium metal as the negative electrode, offering fast-charging capabilities and cycle stability. Physicochemical and electrochemical characterizations of NTWO in combination with the Li<sub>6</sub>PS<sub>5</sub>Cl (LPSCl) solid-state electrolyte demonstrate that the formation of LiWS<sub>2</sub> at the electrode|electrolyte interphase is the main responsible for the improved battery performance. Indeed, when an NTWO-based negative electrode and LPSCl are coupled with a LiNbO<sub>3</sub>-coated LiNi<sub>0.8</sub>Mn<sub>0.1</sub>Co<sub>0.1</sub>O<sub>2</sub>-based positive electrode, the lab-scale cell is capable of maintaining 80% of discharge capacity retention after 5000 cycles at 45 mA cm<sup>-2</sup> at 60 °C and 60 MPa.