Annealing induced a well-ordered single crystal δ-MnO2 and its electrochemical performance in zinc-ion battery.

Abstract:

:Herein, the formation and electrochemical performance of a novel binder-free turbostratic stacked/ well-ordered stacked δ-MnO2-carbon fiber composite cathodes in deep eutectic solvent (DES) based zinc-ion battery (ZIB) is reported. Results of morphological, elemental, and structural analyses revealed directly grown and interconnected δ-MnO2 crumpled nanosheets on a carbon fiber substrate. Moreover, an improvement via a simple annealing strategy in the stacking, surface area and conductivity of the δ-MnO2 sheets was observed. Annealing induces the rearrangement of δ-MnO2 sheets resulting in the transformation from turbostratic stacking to a well-ordered stacking of [Formula: see text]-MnO2 sheets, as indicated by the selected area electron diffraction (SAED) hexagonal single crystal pattern. Besides, the formation of the well-ordered stacking of [Formula: see text]-MnO2 sheets exhibited improved electrochemical performance and cyclability, as cathode material for ZIB. The novel strategy described in this study is an essential step for the development of binder-free δ-MnO2-C fiber composite with a well-ordered stacking of δ-MnO2 sheets. This study also demonstrated comparable electrochemical performance between the turbostratic [Formula: see text]-MnO2 sheets and the well-ordered stacked δ-MnO2 sheets.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Corpuz RD,De Juan LMZ,Praserthdam S,Pornprasertsuk R,Yonezawa T,Nguyen MT,Kheawhom S

doi

10.1038/s41598-019-51692-x

subject

Has Abstract

pub_date

2019-10-22 00:00:00

pages

15107

issue

1

issn

2045-2322

pii

10.1038/s41598-019-51692-x

journal_volume

9

pub_type

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