Partic. vol. 17 pp. 54-58 (December 2014)
doi: 10.1016/j.partic.2014.01.004

Fabrication and electrochemical performance of nanofibrous micro-frameworks of α-MnO₂

Dalai Jin^a,*, Ruirui Liu^b, Xiaochu Ding^c, Longcheng Wang^a, Lina Wang^d, Linhai Yue^b

jindl@zstu.edu.cn

Abstract

A facile solid-phase conversion route is proposed to fabricate a micro-framework of α-MnO₂ with a nanofibrous structure and high porosity. The fabrication is achieved by a three-step process using a preformed manganese tartrate with a rectangular framework as the precursor followed by thermal annealing and hydrothermal oxidation to form the final nanofibrous structure. Evolution of the phase and the morphology are characterized by FESEM, XRD, TG–DTA, and TEM measurements. The electrochemically active material α-MnO₂ exhibits both attractive stability of the Coulombic efficiency after long-term cyclic charging/discharging and acceptable specific capacitance.

Graphical abstract

Keywords

Manganese oxide; Hierarchical structure; Nanofiber