Mesoporous ZnCo2O4/rGO nanocomposites enhancing sodium storage

• Published in: Nanotechnology 2019-06, Vol.30 (23), p.234005-234005
• Main Authors: Xu, Jie, Yan, Bo, Maleki Kheimeh Sari, Hirbod, Hao, Youchen, Xiong, Dongbin, Dou, Shuming, Liu, Wen, Kou, Huari, Li, Dejun, Li, Xifei
• Format: Article
• Language: English
• Subjects: reduced graphene oxide; sodium-ion battery; synergic effect; ZnCo
• ISSN: 0957-4484; 1361-6528
• DOI: 10.1088/1361-6528/ab0504

In this study, mesoporous ZnCo2O4/rGO nanocomposites were favorably synthesized via a simple solvothermal technique. As a prospective anode material for sodium-ion batteries, the resulting ZnCo2O4/rGO-II nanocomposite exhibited superior electrochemical sodium storage performance with predominant specific capacity, favorable cyclability and ascendant rate capability. For example, an outstanding discharge capacity of 210.5 mAh g−1 was delivered at a current density of 200 mA g−1. Notably, the nanocomposite could yield a discharge capacity of 101.7 mAh g−1 at a current density of 1000 mA g−1 after 500 loops, which certifies its superior capacity retention and predominant cycling stability. The boosted performance of the anode materials is due to the mutual synergistic effect resulting from a combination of the mesoporous ZnCo2O4 nanospheres and conducting reduced graphene oxide nanosheets.