Fabrication and electrochemical performance of nanofibrous micro-frameworks of α-MnO2--颗粒学报PARTICUOLOGY

Jin, D., Liu, R., Ding, X., Wang, L., Wang, L., & Yue, L. (2014). Fabrication and electrochemical performance of nanofibrous micro-frameworks of α-MnO2. Particuology, 17, 54–58. https://doi.org/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

a Center of Materials Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
b Department of Chemistry, Zhejiang University, Hangzhou 310027, China
c Department of Chemistry, Michigan Technological University, 1400 Townsend Drive, MI 49931, USA
d Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China

10.1016/j.partic.2014.01.004

Volume 17, December 2014, Pages 54-58

Received 5 September 2013, Revised 18 January 2014, Accepted 22 January 2014, Available online 27 March 2014.

E-mail: jindl@zstu.edu.cn

Highlights

• α-MnO₂ nanofibers with assembled framework were synthesized by a solid-phase conversion process.

• Mechanism was speculated that precursor provides the scaffold as a self-sacrificing template.

• About 90% Coulombic efficiency remained after 1000 cycles of charge/discharge process.

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

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