Unique Lamellar Sodium/Potassium Iron Oxide Nanosheets: Facile Microwave-Assisted Synthesis and Magnetic and Electrochemical Properties

作者：Wu Liheng; Yao Hongbin; Hu Bo; Yu Shu Hong^*

来源：Chemistry of Materials, 2011, 23(17): 3946-3952.

DOI：10.1021/cm2013736

• microwave-assisted process
• lamellar nanosheets
• ferromagnetic
• electrochemistry
• lithium-ion battery

Unique lamellar sodium/potassium iron oxide nanosheets consisting of two-dimensional iron oxide building blocks have been synthesized by microwave assisted heating the suspension of iron(II) sulfate, sodium thiosulfate, and sodium/potassium hydroxide within 5 min. These lamellar iron oxide building blocks are separated by intercalated sodium/potassium ions, which possess typical ferromagnetic properties due to the magnetic anisotropy of the lamellar iron oxide. Owing to their layered feature, these nanosheets with a high Brunauer-Emmett-Teller (BET) surface area could allow fast Li-ion diffusion, and thus the preliminary investigations on their electrochemical properties have been carried out, which indicate potential applications of these lamellar nanosheets as anode materials for high-performance lithium-ion batteries. Moreover, this facile microwave-assisted synthesis strategy will open a new route to prepare other lamellar metal oxide nanomaterials with unique architectures and multifunctionalities.

• 出版日期2011-9-13
• 单位中国科学技术大学