Journal
ELECTROCHIMICA ACTA
Volume 388, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2021.138622
Keywords
Ti3C2Tx; MXene; Li-O-2 batteries; cathode catalyst
Categories
Funding
- Qilu Young Scholar Program in Shandong University
- National Natural Science Foundation of China [51901114, 21706292, 51971044]
- National Key R&D Program of China [2017YFE0195200, 2018YFE0103500]
- Hunan Provincial Science and Technology Plan Project, China [2016TP1007]
Ask authors/readers for more resources
This study demonstrates the outstanding electrocatalytic performance of Ti3C2Tx MXene as a cathode catalyst for LOBs, with efficient catalytic capability, large specific capacity, and high-rate cycle stability. Ti3C2Tx MXene dominates the evolution of discharge/charge products at high rates with multi-formation kinetics.
MXenes have been theoretical predicted as one of the most promising materials for catalytic cathode materials in Li-O-2 batteries (LOBs). Herein, we demonstrated the outstanding electrocatalytic performance of Ti3C2Tx MXene as cathode catalyst for LOBs. The Ti3C2Tx MXene exhibited highly efficient catalytic capability for the formation/decomposition of discharge product, large specific capacity and high-rate cycle stability. The Ti3C2Tx MXene provided a heterogeneous surface condition and dominated the discharge/charge products evolution with multi-formation kinetics of Li2O2 and Li2-xO2 at high-rate conditions. Furthermore, the porous structure of discharge products composed by the vertical growing Li2O2 nanoflakes favored the mass transport between the electrode/electrolyte interfaces. As a consequence, the Ti3C2Tx MXene cathode delivered a large capacity of 15468 mAh g(-1) and an excellent high rate cyclability of 155/80 cycles at a high current of 500/1000 mA g(-1). This work provides intrinsic insights into designing high-performance MXene based electrocatalysts for LOBs. (C) 2021 Elsevier Ltd. All rights reserved.
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