Journal
ACS NANO
Volume 14, Issue 11, Pages 16073-16084Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c07999
Keywords
lithium-sulfur batteries; MOx-MXene heterostructure; universal; high tap density; 3D printing
Categories
Funding
- National Natural Science Foundation of China [51702225]
- National Key Research and Development Program of China [2016YFB0100200]
- Natural Science Foundation of Jiangsu Province [BK20170336]
- Suzhou Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Suzhou, China
Ask authors/readers for more resources
The Li-S battery has emerged as a promising next-generation system for advanced energy storage. Notwithstanding the recent progress, the problematic polysulfide shuttling, retarded sulfur redox, and low output of volumetric capacity remain daunting challenges toward its practicability. In response, this work demonstrates herein a universal approach to in situ craft MOx-MXene (M: Ti, V, and Nb) heterostructures as heavy and multifunctional hosts to harvest good battery performances with synchronous polysulfide immobilization and conversion. Theoretical calculations indicate that the in situ implanted oxides boost the reaction kinetics of polysulfide transformation without affecting the intrinsic conductivity of MXene. As a result, the representative VOx-V2C/S electrode enables a high volumetric capacity (offering 1645.98 mAh cm(-3) at 0.2 C) and cycling stability (retaining 631.17 mAh cm(-3) after 1500 cycles at 2.0 C with a capacity decay of 0.03% per cycle). More encouragingly, 3D-printed sulfur electrodes harnessing VOx-V2C hosts readily harvest an areal capacity of 9.74 mAh cm(-2) at 0.05 C under an elevated sulfur loading of 10.78 mg cm(-2), holding promise for the development of practically viable Li-S batteries.
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