Issue 11, 2023

Mo10V2@MIL-101: pseudo-capacitive and redox-active efficient anode material for high-rate lithium cluster batteries

Abstract

Efficient anode materials that exhibit superior charge transfer, multi-electron transfer, and reduced volume changes are highly valued in lithium-ion storage. Polyoxometalates (POMs) have been used in various energy storage and conversion devices due to their wide electrochemical features and various redox properties. However, the facile solubility of POM in the electrolyte limits its cycling stability for further use in electrochemical applications. The above-mentioned difficulty can be improved through the encapsulation of POM in metal–organic framework (MOF) matrices. Herein, Mo10V2@MIL-101 was designed and synthesized via a one-pot solvothermal method. The Mo10V2@MIL-101 material exhibits a discharge capacity of 725 mA h g−1 at 100 mA g−1 after 100 cycles, which is higher than those of the parent MIL-101(Fe) (328 mA h g−1) and Mo10V2 (122 mA h g−1). Even at a higher current density of 1000 mA g−1, a high specific capacity of 625 mA h g−1 is attained after 300 cycles. Due to the multi-redox behavior of POM and accessible sites for Li-ion transportation in the MOF, the synergistic effects of these two boost the specific capacity and further reduce the volume expansion. An increasing trend in the discharge capacity arises as a result of pseudo-capacitive behavior. Hence, this work helps to advance the development of novel lithium storage electrode materials based on POM@MOFs.

Graphical abstract: Mo10V2@MIL-101: pseudo-capacitive and redox-active efficient anode material for high-rate lithium cluster batteries

Supplementary files

Article information

Article type
Paper
Submitted
12 Jul 2022
Accepted
13 Feb 2023
First published
14 Feb 2023

New J. Chem., 2023,47, 5498-5509

Mo10V2@MIL-101: pseudo-capacitive and redox-active efficient anode material for high-rate lithium cluster batteries

M. Priyadarshini, S. Shanmugan, C. W. Lee and K. Vediappan, New J. Chem., 2023, 47, 5498 DOI: 10.1039/D2NJ03426C

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