Oxidized mixed phase Ti3C2Tx MXene nanosheets as a high-performance Li-ion battery anode material

被引:3
作者
Kamat, Rohan S. [1 ]
Mulik, Chetana U. [1 ]
Wang, Xijue [2 ]
Padwal, Chinmayee [2 ]
Kulkarni, Abhishek A. [2 ]
Jadhav, Lata D. [1 ]
Dubal, Deepak P. [2 ]
机构
[1] Rajaram Coll, Dept Phys, Electrochem Mat Res Lab, Kolhapur 416004, Maharashtra, India
[2] Queensland Univ Technol QUT, Ctr Mat Sci, Sch Chem & Phys, 2 George St, Brisbane, Qld 4000, Australia
关键词
Ti3C2Tx; MXene; Nanosheets; Lithium-ion battery; Anode; 2D TITANIUM CARBIDE; LITHIUM STORAGE; VOLUMETRIC CAPACITY; NANOPARTICLES; ELECTRODES; GRAPHENE; COMPOSITES; CAPABILITY; DIFFUSION; FILMS;
D O I
10.1007/s11581-024-05916-4
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
To address the challenge of low electronic and ionic conductivities in lithium-ion batteries (LIBs), we synthesized oxidized mixed-phase Ti3C2Tx MXene nanosheets using a wet chemical etching route. This prepared negative electrode demonstrated a reversible specific discharge capacity of 538.49 mAh/g at 0.1C (67 mA/g), which is significantly higher than the pristine MXene and retained 75.46% of its initial capacity during the rate performance test. During its testing for cycling stability, it demonstrated a stable discharge capacity of 383.33 mAh/g after 264 cycles at 0.1C (67 mA/g) and showed an increasing profile with a rosed capacity of 551.98 mAh/g after 404 cycles at 0.4C (268 mA/g). The exceptional electrochemical performance is attributed to the Ti3C2Tx MXene architecture, with oxidation of its nanosheets resulting in an increase in exposed Li+ sites leading to structural stability. The galvanostatic intermittent titration technique (GITT) was performed for the numerical analysis of Li+ mobility. To analyze the effective charge storage mechanism, electrochemical impedance spectroscopy (EIS) was also performed. This MXene electrode is found to be a promising negative electrode with a simple synthesis route demonstrating enhanced electrochemical performance and stability.
引用
收藏
页码:165 / 176
页数:12
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