Journal
ENERGY STORAGE MATERIALS
Volume 16, Issue -, Pages 163-168Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2018.04.029
Keywords
MXene; Cation; Intercalation; Coulombic interaction; Capacity
Funding
- National Key R & D Program of China [2016YFA0200400]
- Jilin Province/Jilin University co-Construction Project-Funds for New Materials [SXGJSF2017-3, Branch-2/440050316A36]
- National Natural Science Foundation of China [91545119, 21761132025, 21773269]
- Youth Innovation Promotion Association CAS [2015152]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09030103]
- Program for JLU Science and Technology Innovative Research Team (JLUSTIRT)
- Double-First Class Discipline for Materials Science Engineering
Ask authors/readers for more resources
MXenes exhibit potentials as electrode materials for metal ion batteries because of high electronic conductivity. However, ionic conductivity of MXenes has set the bottleneck to meet high energy and powder density demand in energy storage. Even though significant progresses have been made for more delicate design of electrodes, it remains very challenging for how to enhance the ion transport capability with the aid of external electric field upon charging process. Herein, high-valence cation (i.e., Al3+ in Period 3) pre-intercalation was utilized to construct an expanded ion transfer channel, which allows for further broadening upon the charging process, in order to enhance the ionic conductivity. This approach was confirmed to effectively improve Li storage capacity and cyclic stability of 2D Ti3C2Tx MXene anode. Compared to low-valence cation Na+, high-valence Al3+ into MXenes layer affords a strong Coulombic interaction upon lithiation/charging process to sustain ion transport channels. Moreover, the common deformation of electrodes upon cycling was limited due to a lower Li diffusion barriers. These findings raise the prospects of an enhanced ion transport capability and reinvent our knowledge of high-valence cations incorporation into 2D and layered materials.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available