Hierarchical nanosheet-assembled copper sulfide microspheres as the cathode materials for rechargeable magnesium batteries. (20th August 2021)

• Record Type: Journal Article
• Authors: Huang, Jiaqin; Zhu, Youqi; Du, Changliang; Han, Zhanli; Yao, Xiuyun; Yang, Xinyu; Cao, Yuehua; Zhang, Yuexing; Ma, Xilan; Cao, Chuanbao
• Is Part Of: Electrochimica acta. Volume 388(2021)
• Publication Date: 2021-08-20
• Subjects: Magnesium storage -- CuS microspheres -- Hydrothermal -- Rechargeable magnesium batteries -- Cathode; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2021.138619
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: A simple template-free hydrothermal method is developed to prepare nanosheet-assembled CuS microspheres with uniform morphology. The long-term cycling stability under high current density can be achieved on the as-synthesized CuS microsphere cathode. Stable 3D integral structure lead to excellent electrochemical property. Abstract: Rechargeable magnesium battery is an inexpensive, high-safety energy storage technology suitable for large-scale applications. However, its development is still hindered by lacking high-performance cathode materials. Herein, we present a simple one-step template-free hydrothermal method to synthesize hierarchical CuS microspheres self-assembled from nanosheets as the cathode materials for rechargeable magnesium battery. Owing to the special structure configuration, the as-synthesized CuS microspheres can exhibit a high specific capacity of 252 mAh g –1 at 100 mA g –1, and a reversible specific capacity of 171.2 mAh g –1 at 500 mA g –1 . Additionally, the CuS microspheres also show good rate capability with 91.7 mAh g –1 specific capacity at high current density of 1000 mA g –1 and a long-term cycling stability over 500 cycles. These electrochemical results indicate that the fabrication of the CuS microspheres with hierarchical structure can provide an efficient route to develop high-performance copper sulfide cathode materials for emerging rechargeable magnesium batteries.