Issue 22, 2024

Nanocomposite of Nb-based binary phase for lowering the activation energy of Li+ intercalation as an anode for high-performance aqueous dual-ion batteries

Abstract

Aqueous dual-ion batteries have good safety, environmental compatibility, and low cost due to the use of an aqueous electrolyte. However, water electrolysis occurs during charging at high potential, resulting in a poor cyclic stability of aqueous dual-ion batteries. Hence, novel anode materials are urgently needed to be developed for aqueous dual-ion batteries with low water electrolysis. A niobium-based binary-phase composite material is reported with a capacity of 135 mA h g−1 at a current density of 0.2 mA cm−2 and with excellent reversibility in the potential range of −1.3–0 V vs. Ag/AgCl. The activation energy of Li+ intercalation was obviously decreased because of the formation of an interface, which enhanced the Li+ intercalation reaction between FeNbO4 and MoNb12O33. In addition, the lower amount of Fe2+ in the lattice of MoNb12O33 caused localized compressive strain, which promoted fast Li+ diffusion in MoNb12O33. A full dual-ion battery of 3.0 V was constructed using the binary-phase niobium-based composite for the anode, and demonstrated a high cycle stability and an average coulombic efficiency of 91% over 300 cycles. Furthermore, considering both the electrolyte and electrode materials, the theoretical energy density of this dual-ion battery was estimated to be 250 W h kg−1, which is close to that of the current Li-ion rechargeable battery.

Graphical abstract: Nanocomposite of Nb-based binary phase for lowering the activation energy of Li+ intercalation as an anode for high-performance aqueous dual-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
26 Feb 2024
Accepted
25 Apr 2024
First published
26 Apr 2024

J. Mater. Chem. A, 2024,12, 13338-13347

Nanocomposite of Nb-based binary phase for lowering the activation energy of Li+ intercalation as an anode for high-performance aqueous dual-ion batteries

D. Yang, J. Matsuda, J. T. Song, M. Watanabe and T. Ishihara, J. Mater. Chem. A, 2024, 12, 13338 DOI: 10.1039/D4TA01293C

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