Magneli Phase Titanium Oxide as a Novel Anode Material for Potassium-Ion Batteries.

ABSTRACT: Recently, K-ion batteries (KIBs) have attracted attention for potential applications in next-generation energy storage devices principally on the account of their abundancy and lower cost. Herein, for the first time, we report an anatase TiO₂-derived Magnéli phase Ti₆O₁₁ as a novel anode material for KIBs. We incorporate pristine carbon nanotube (CNT) on the TiO₂ host materials due to the low electronic conductivity of the host materials. TiO₂ transformed to Magnéli phase Ti₆O₁₁ after the first insertion/deinsertion of K ions. From the second cycle, Magnéli phase Ti₆O₁₁/CNT composite showed reversible charge/discharge profiles with ∼150 mA h g^-1 at 0.05 A g^-1. Ex situ X-

SUBMITTER: Lee GW 

PROVIDER: S-EPMC6648113 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature