Linheng Ge, Hong Zhang, Zirui Wang, Qingli Gao, Manman Ren, Xiaoxia Cai, Qinze Liu, Weiliang Liu, Jinshui Yao
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引用次数: 0
Abstract
Due to its abundant zinc resources, high safety and low cost, aqueous zinc-ion batteries (AZIBs) are considered one of the most interesting lithium-ion battery replacement technologies. Herein, a novel Zn-doped cathode material is achieved via pre-intercalation of Zn2+ into the prepared manganese tetroxide (Mn3O4)/graphene oxide (GO). The pre-intercalation of Zn2+ effectively increases the lattice spacing of Mn3O4 and reduces the barrier of insertion/extraction of Zn2+, thus improving the kinetic properties of the material. Meanwhile, the conductive carbon skeleton GO successfully combines with polyethyleneimine and Mn3O4, which can expand electron and ion conductivity and avoid chemical bulk change. This unique structure enables the Zn-doped cathode a reversible specific capacity with excellent performance (170 mAh g−1 at 200 mA g−1). Furthermore, the diffusion coefficient of the Zn-doped cathode is 10−9–10−10cm−2 s−1. Therefore, this study introduces a viable approach for the practical implementation of advanced electrode materials in AZIBs applications.
期刊介绍:
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.