Huiting Xu , Meng Li , Peng Guo , Wenyue Yang , Chunli Li , Honghai Wang , Wenchao Peng , Liu Jiapeng
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引用次数: 0
Abstract
Aqueous zinc-ion batteries (AZIBs) have become a hot topic in study owing to their abundance of zinc resources, environmental friendliness, high capacity, and low cost. Nevertheless, the majority of cathode materials utilized in AZIBs frequently exhibit suboptimal electrical conductivity and structural instability, which restrict their application in energy storage. Here, a carbon-coated manganese oxide anchored on carbon skeleton (MnO–C@C) hybrid was synthesized using a simple and scalable method. The electrical conductivity of MnO can be enhanced by the double carbon layer. The presence of carbon skeleton effectively inhibits the agglomeration phenomenon of MnO and exposes more active sites. Meanwhile, the interaction force between the coated carbon and MnO effectively increases the structural stability of MnO. Taking advantage of the synergistic effect, the MnO–C@C hybrid shows an exceptional specific capacity of 409 mAh g−1 at 50 mA g−1 and outstanding cycling stability of 1000 cycles at 2000 mA g−1 (low decay rate of 0.0058 % per cycle). Besides, the reaction mechanisms are investigated via various characterizations. This work presents an inspired solution for developing manganese-based cathode materials in AZIBs.
期刊介绍:
The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.