We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Approaching the Theoretical Sodium Storage Capacity and Ultrahigh Rate of Layer‐Expanded MoS<sub>2</sub> by Interfacial Engineering on N‐Doped Graphene.
- Authors
Liang, Shichuan; Zhang, Su; Liu, Zheng; Feng, Jing; Jiang, Zimu; Shi, Mengjiao; Chen, Lan; Wei, Tong; Fan, Zhuangjun
- Abstract
Molybdenum disulfide (MoS2) holds great potential for sodium storage due to its high theoretical capacity of 670 mAh g−1. However, its theoretical capacity is hardly realized because of low conductivity, sluggish electrochemical kinetics, and unsatisfied structural stability. Herein, a polyaniline‐mediated interfacial engineering strategy for the growth of interlayer‐expanded MoS2 nanoflowers on N‐doped graphene "land" (E‐MoS2/NG) using Mo7O246− anions adsorbed on positively charged polyaniline as the "seeds" is reported. The strong interfacial interaction between MoS2 and graphene through MoN bonds as well as ultrathin interlayer‐expanded MoS2 can significantly improve the electrochemical kinetics and structural stability. As a result, E‐MoS2/NG with a high MoS2 content of 90 wt% shows a high capacity (620 mAh g−1 at 0.1 A g−1), an ultrahigh rate capability (201 mAh g−1 at 50 A g−1), and outstanding cycle performance (390 mAh g−1 after 1000 cycles at 1 A g−1). Importantly, MoS2 in the composite approaches its theoretical capacity of 670 mAh g−1. Furthermore, the assembled E‐MoS2/NG//activated carbon sodium ion capacitor delivers high energy densities of 150 and 82 Wh kg−1 at 35 and 14 421 W kg−1, respectively, and a capacity retention of 78.1% after 1500 cycles at 10 A g−1, demonstrating great potential for practical application.
- Subjects
CHEMICAL stability; GRAPHENE; SODIUM compounds; ENGINEERING; SODIUM ions; ACTIVATED carbon; MOLYBDENUM disulfide; MOLYBDENUM sulfides
- Publication
Advanced Energy Materials, 2021, Vol 11, Issue 12, p1
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.202002600