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Nanomaterials 2018, 8(6), 377; https://doi.org/10.3390/nano8060377

Facile Synthesis of Porous ZnCo2O4 Nanosheets and the Superior Electrochemical Properties for Sodium Ion Batteries

1,* , 2
and
2,3
1
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
2
School of Earth and Space Science, Peking University, Beijing 100871, China
3
Materials Science & Engineering, Columbia University, New York, NY 10027, USA
*
Author to whom correspondence should be addressed.
Received: 8 May 2018 / Revised: 25 May 2018 / Accepted: 26 May 2018 / Published: 28 May 2018
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Abstract

ZnCo2O4 nanosheets with large surface area and mesoporous structure were synthesized using a facile hydrothermal method followed with a calcination process. When applied as the anode material in sodium ion batteries, the ZnCo2O4 nanosheets demonstrated a high initial charge capacity of 415.1 mAh/g at the current density of 100 mA/g. Even though the reversible capacity decreased in the first 20 cycles, it stayed relatively stable afterwards and retained 330 mAh/g after 100 cycles. This result was superior to those of many reported works of ZnO- and Co3O4-based anodes for sodium ion batteries, which might be due to the synergistic effect of both Zn and Co, and the refined porous nanosheet-like structure which facilitates electrochemical reactions by providing more reaction sites and ensures cycling stability by providing more space to accommodate the structural strains during cycles. View Full-Text
Keywords: ZnCo2O4; nanosheet; sodium ion batteries; hydrothermal; anode ZnCo2O4; nanosheet; sodium ion batteries; hydrothermal; anode
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Cao, X.; Yang, Y.; Li, A. Facile Synthesis of Porous ZnCo2O4 Nanosheets and the Superior Electrochemical Properties for Sodium Ion Batteries. Nanomaterials 2018, 8, 377.

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