A novel layered birnessite-type sodium molybdate as dual-ion electrodes for high capacity battery. (10th December 2020)

• Record Type: Journal Article
• Authors: Li, Xuhai; Wang, Zhiqiang; Duan, Xiao; Xu, Liang; Yang, Ming; Yuan, Shuang; Meng, Chuanmin; Wu, Qiang; Wang, Qiang
• Is Part Of: Electrochimica acta. Volume 363(2020)
• Publication Date: 2020-12-10
• Subjects: Sodium molybdate -- Birnessite-type -- Layered structure -- Dual-ion batteries (DIBs) -- High capacity; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2020.137229
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: A birnessite-type Na1/3 MoO2 H2 O with a large interlayer distance has been synthesized by solid-state reaction and water treatment for the first time. The obtained Na1/3 MoO2 H2 O is phase-pure and well-crystallized as determined by X-ray structure refinement and presents a typical plate-like microstructure. Surprisingly, the Na1/3 MoO2 H2 O can be used as both anode and cathode electrodes for Li-ion batteries (LIBs), which shows long cycle life ((anode, 500 cycles~650 mAh g −1 ), and high capacity of 300 mAh g −1 (cathode). This high performance is ascribed to the PF6 − intercalation mechanism of Na1/3 MoO2 H2 O based on the density functional theory (DFT) calculations. This work offers an efficient way for the design of electrode materials and sheds light on the application of the Na1/3 MoO2 H2 O for high capacity dual-ion batteries (DIBs).