Enhanced ion intercalation in Ni _<i>x</i> K_1-2<i>x</i> TiNbO₅ enabled by redox active Ni exchange for potassium-ion batteries.

ABSTRACT: The ultimate goal of potassium-ion batteries (KIBs) is to become a serious competitor to lithium-ion batteries (LIBs). Achieving this requires the development of high energy density negative electrode materials, with transition metal oxides emerging as the most promising candidates. However, despite their high theoretical capacities, most transition metal oxides still struggle to achieve high performance, often necessitating substantial nanostructuring. Ion-exchange presents a facile and effective process for enhancing material properties, yet the demonstration of the exchanged ions undergoing redox activity has not been previously reported for KIBs. Herein, this work reports Ni_0.25K_0.5TiNbO₅, synthesized through the ion-exchange between K⁺ and N

SUBMITTER: Nason CAF 

PROVIDER: S-EPMC12445367 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature