A customized strategy to design intercalation-type Li-free cathodes for all-solid-state batteries.

ABSTRACT: Pairing Li-free transition-metal-based cathodes (MX) with Li-metal anodes is an emerging trend to overcome the energy-density limitation of current rechargeable Li-ion technology. However, the development of practical Li-free MX cathodes is plagued by the existing notion of low voltage due to the long-term overlooked voltage-tuning/phase-stability competition. Here, we propose a p-type alloying strategy involving three voltage/phase-evolution stages, of which each of the varying trends are quantitated by two improved ligand-field descriptors to balance the above contradiction. Following this, an intercalation-type 2H-V_1.75Cr_0.25S₄ cathode tuned from layered MX₂ family is successfully designed, which possesses an energy density of 554.3 Wh kg

SUBMITTER: Wang D 

PROVIDER: S-EPMC9976772 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature