Exploration of a Na3V2(PO4)3/C –Pb full cell Na-ion prototype. (May 2022)

• Record Type: Journal Article
• Authors: Pandit, Bidhan; Sougrati, Moulay Tahar; Fraisse, Bernard; Monconduit, Laure
• Is Part Of: Nano energy. Volume 95(2022)
• Publication Date: 2022-05
• Subjects: Sodium-ion battery -- Cathode material -- Polyanionic phosphates -- Na3V2(PO4)3-C -- Full cell -- Lead anode; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2022.107010
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Recent research focusses typically on sodium-ion half cells, and the progress of high performance and cost-effective full cells remains a critical obstacle to commercialize sodium-ion batteries. Here, we rationally design a full sodium-ion battery based on carbon coated Na3 V2 (PO4 )3 (NVP-C) cathode and Pb anode materials. Carbon coated NVP is prepared via easy and one-step solid-state method. With 8 wt% carbon content, the obtained NVP-C core-shell structure provides an excellent reversible capacity of 104 mAh/g at C/10 rate, approaching towards its theoretical capacity. The NVP-C electrode even at a high 5 C rate delivers a primary reversible capacity of 87 mAh/g with 99.9% capacity retention almost after 3500 cycles. As an anode, Pb delivers an initial reversible capacity of 477 mAh/g at a fixed current density of 13 mA/g with a good cyclability and capacity retention of 98.5% over 50 cycles. The full cell constructed from the as-prepared materials exhibits a preliminary reversible capacity of 233 mAh/g at C/10 rate. In addition, the good rate capability including discharge energy density in the range of 170–180 Wh/kg makes the full cell a potential candidate in practical sodium-ion battery application. The excellent electrochemical behavior with simple, low-cost properties of fabricated full cell mark it as attractive option for high-energy energy storage applications. Graphical Abstract: ga1 Highlights: The Na3 V2 (PO4)3 -C core-shell structure provides an excellent reversible capacity of 104 mAh/g at C/10 rate. The electrode delivers a reversible capacity of 87 mAh/g with 99.9% capacity retention after 3500 cycles even at 5C rate. Preliminary tests in Pb//Na3 V2 (PO4 )3 -C full cells showed promising results in terms of capacity and stability. The assembled full cell shows a reversible capacity of 300 mAh/g at C/10, with an excellent energy density of 170 Wh/kg.