Abstract
Lithium metal batteries (LMBs) have attracted increasing attention owing to their high theoretical capacity and low reduction potential. However, safety concerns and their low coulombic efficiencies (CE) arising from the nonuniform and irreversible formation of Li dendrites on their anodes hinder their practical application. Here, we demonstrate that a highly defective titanium-carbonitride (Ti3CNTx)-MXene-based fiber membrane can function as a dendrite-free anode substrate for LMBs. The Ti3CNTx fiber membrane electrodes, prepared via the electrostatic self-assembly of Ti3CNTx flakes onto a glass-fiber membrane substrate, had a high surface area (∼276 m2 g−1), leading to a high CE of ∼99.1%, excellent cycling stability of more than 1000 cycles in a Li half-cell test, and high energy density (581.78 W h kg−1) and high power density (3008 W kg−1) in a Li-MXene-fiber/NCM622 full-battery test. This excellent cell performance is attributed to the strong lithiophilicity and high density of Ti vacancy defects in the Ti3CNTx MXenes, as well as the high surface area of the fiber membrane electrode. The lithiophilicity and defect structure of Ti3CNTx MXenes in LMB operation were elucidated by DFT calculations.
Original language | English |
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Pages (from-to) | 76-84 |
Number of pages | 9 |
Journal | Energy Storage Materials |
Volume | 52 |
DOIs | |
Publication status | Published - 2022 Nov |
Bibliographical note
Funding Information:S. C. and S. Y. contributed equally to this research. This study was supported by a grant from the Basic Science Research Program (2021M3H4A1A03047327 and 2022R1A2C3006227) through the National Research Foundation of Korea, funded by the Ministry of Science, ICT and Future Planning, and the Fundamental R&D Program for Core Technology of Materials and the Industrial Strategic Technology Development Program (20020855) funded by the Ministry of Trade, Industry and Energy, Republic of Korea. This work was partially supported by a start-up fund (S-2022-0096-000) from Sungkyunkwan University. This work was supported by the National Research Council of Science & Technology (NST) grant by the Korea Government (MSIT) (CRC22031-000). S. Y. and J. H. L.’s research were supported by the KIST Institutional Program (Project No. 2E31201). Computational resources provided by the KISTI Supercomputing Center (Project No. KSC-2020-CRE-0361) is gratefully acknowledged.
Funding Information:
S. C. and S. Y. contributed equally to this research. This study was supported by a grant from the Basic Science Research Program ( 2021M3H4A1A03047327 and 2022R1A2C3006227 ) through the National Research Foundation of Korea , funded by the Ministry of Science, ICT and Future Planning , and the Fundamental R&D Program for Core Technology of Materials and the Industrial Strategic Technology Development Program (20020855) funded by the Ministry of Trade, Industry and Energy , Republic of Korea. This work was partially supported by a start-up fund ( S-2022-0096-000 ) from Sungkyunkwan University. This work was supported by the National Research Council of Science & Technology (NST) grant by the Korea Government (MSIT) ( CRC22031-000 ). S. Y. and J. H. L.’s research were supported by the KIST Institutional Program (Project No. 2E31201 ). Computational resources provided by the KISTI Supercomputing Center (Project No. KSC-2020-CRE-0361 ) is gratefully acknowledged.
Publisher Copyright:
© 2022
Keywords
- Defect
- Lithium metal battery
- MXene
- Ti vacancy
- TiCNTx
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
- Energy Engineering and Power Technology