Realizing stable electrochemical performance using MnNi2O4 micro/nano mesospheres prepared by self-template route

In this paper, we have successfully prepared MnNi2O4 micro/nano multiporous spheres via a subsequent simple impregnation and calcination. Lithium storage performance of the as-prepared MnNi2O4 has been firstly investigated, with a stable capacity of 669.2 mAh g(-1) after 70 cycles at 1.0 A g(-1). Cyclic voltammograms data indicate that discharge-charge process is synergistically controlled by both the dominate diffusion and the secondary capacitive behavior. Electrochemical impedance spectroscopy evidences low resistance and high Li+ diffusion coefficient (3.4 x 10(-15) cm(2) s(-1)). Furthermore, an excellent super-capacitor behavior is also achieved. All that can be benefited from the unique micro/nano multiporous structures which can effectively facilitate electrolyte penetration and diffusion of tiny particles, alleviate the volume swelling and the electrochemical agglomeration, suggesting a prospective application in energy storage devices. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

In this paper, MnNi2O4 micro/nano multiporous spheres were prepared using a simple impregnation and calcination method. The lithium storage performance and supercapacitor behavior of the synthesized material were investigated. The results showed stable lithium ion capacity, low resistance, and potential applications in energy storage devices.