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Design of Vertically Aligned Two-Dimensional Heterostructures of Rigid Ti 3 C 2 T X MXene and Pliable Vanadium Pentoxide for Efficient Lithium Ion Storage.
- Source :
-
ACS nano [ACS Nano] 2022 Apr 26; Vol. 16 (4), pp. 5556-5565. Date of Electronic Publication: 2022 Apr 15. - Publication Year :
- 2022
-
Abstract
- Designing a thick electrode with appropriate mass loading is a prerequisite toward practical applications for lithium ion batteries (LIBs) yet suffers severe limitations of slow electron/ion transport, unavoidable volume expansion, and the involvement of inactive additives, which lead to compromised output capacity, poor rate perforamnce, and cycling instability. Herein, self-supported thick electrode composed of vertically aligned two-dimensional (2D) heterostructures (V-MXene/V <subscript>2</subscript> O <subscript>5</subscript> ) of rigid Ti <subscript>3</subscript> C <subscript>2</subscript> T <subscript>X</subscript> MXene and pliable vanadium pentoxide are assembled via an ice crystallization-induced strategy. The vertical channels prompt fast electron/ion transport within the entire electrode; in the meantime, the 3D MXene scaffold provides mechanical robustness during lithiation/delithiation. The optimized electrodes with 1 and 5 mg cm <superscript>-2</superscript> of V-MXene/V <subscript>2</subscript> O <subscript>5</subscript> respectively deliver 472 and 300 mAh g <superscript>-1</superscript> at a current density of 0.2 A g <superscript>-1</superscript> , rate performance with 380 and 222 mAh g <superscript>-1</superscript> retained at 5 A g <superscript>-1</superscript> , and reliability over 800 charge/discharge cycles.
Details
- Language :
- English
- ISSN :
- 1936-086X
- Volume :
- 16
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- ACS nano
- Publication Type :
- Academic Journal
- Accession number :
- 35426659
- Full Text :
- https://doi.org/10.1021/acsnano.1c10212