Uniform MnCo2 O4 Porous Dumbbells for Lithium-Ion Batteries and Oxygen Evolution Reactions

ACS Applied Materials & Interfaces
Xiangzhong KongAnqiang Pan

Abstract

Three-dimensional (3D) binary oxides with hierarchical porous nanostructures are attracting increasing attentions as electrode materials in energy storage and conversion systems because of their structural superiority which not only create desired electronic and ion transport channels but also possess better structural mechanical stability. Herein, unusual 3D hierarchical MnCo2O4 porous dumbbells have been synthesized by a facile solvothermal method combined with a following heat treatment in air. The as-obtained MnCo2O4 dumbbells are composed of tightly stacked nanorods and show a large specific surface area of 41.30 m2 g-1 with a pore size distribution of 2-10 nm. As an anode material for lithium-ion batteries (LIBs), the MnCo2O4 dumbbell electrode exhibits high reversible capacity and good rate capability, where a stable reversible capacity of 955 mA h g-1 can be maintained after 180 cycles at 200 mA g-1. Even at a high current density of 2000 mA g-1, the electrode can still deliver a specific capacity of 423.3 mA h g-1, demonstrating superior electrochemical properties for LIBs. In addition, the obtained 3D hierarchical MnCo2O4 porous dumbbells also display good oxygen evolution reaction activity with an overpotential of 42...Continue Reading

References

May 6, 2014·ACS Applied Materials & Interfaces·Guoyong HuangHongyu Sun
Nov 17, 2016·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Dai-Huo LiuQingyu Yan

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Citations

Sep 27, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Peng HuangQing Jiang
Feb 6, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Kalyan Ghosh, Suneel Kumar Srivastava

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