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19 October 2022 Assembling phytic acid into Ti3C2Tx MXene for enhanced lithium storage kinetics
Minxi Li, Jinwen Qin, Minhua Cao
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Proceedings Volume 12294, 7th International Symposium on Advances in Electrical, Electronics, and Computer Engineering; 122942B (2022) https://doi.org/10.1117/12.2640736
Event: 7th International Symposium on Advances in Electrical, Electronics and Computer Engineering (ISAEECE 2022), 2022, Xishuangbanna, China
Abstract
MXenes with unique two-dimensional (2D) open structure, high metallic conductivity, and tunable interlayer spacing are attractive for lithium-ion batteries (LIBs). However, the nanosheets restacking of MXenes hinders ion accessibility, resulting in the limited capacity, poor rate performance and sluggish ion-transport kinetics. Herein, phytic acid (PA), containing a myoinositol ring coupled with six phosphate groups, was first assembled into Ti3C2Tx MXene (M-PA) to achieve a supramolecular self-assembly via hydrogen bonds. The as-prepared 3D porous architecture of M-PA with larger interlayer spacing is favorable for the ion transfer, thus facilitating the improvement of lithium storage performance. As a result, the M-PA electrode exhibits a specific capacity of 391.7 mA h g-1 at 0.1 A g-1 (vs. 165.6 mA h g-1 for the Ti3C2Tx counterpart) and outstanding ion-transport kinetics. This work highlights the delicate construction of high-performance MXene-based electrodes with 2D materials as the building blocks.
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Minxi Li, Jinwen Qin, and Minhua Cao "Assembling phytic acid into Ti3C2Tx MXene for enhanced lithium storage kinetics", Proc. SPIE 12294, 7th International Symposium on Advances in Electrical, Electronics, and Computer Engineering, 122942B (19 October 2022); https://doi.org/10.1117/12.2640736
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KEYWORDS
Lithium
Electrodes
FT-IR spectroscopy
Diffusion
Ions
Molecular self-assembly
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