We present synthesis, acid-leaching, characterization and electrochemistry of α-MnO2 nanowires with tunnel crystal structure. This material is used as a matrix for lithium ions intercalation to provide insights into the effects of postsynthesis
treatment on charge storage properties. Hydrothermal treatment of precursors produced 20 - 200 nm thick and
tens of microns long nanowires. Acid leaching was carried out in the concentrated nitric acid at room temperature and
resulted in the change of material composition and surface area. Original α-MnO2 nanowires showed initial discharge specific capacity of 96 mAh/g, while acid-leached material exhibited higher capacity values. This work forms the basis
for future study aimed at understanding of correlation between crystal structure, composition and morphology of the
“host” matrix and nature of the “guest” ions for beyond lithium electrochemical energy storage. In addition, we
demonstrate single nanowire electrochemical cells for the study of electrochemically-correlated mechanical properties of
the nanowires.
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