Type

Journal Article

Authors

Jonathan N Coleman
Yanguang Li
Umar Khan
Andrew Harvey
Damien Hanlon
Xiaoyun He
Yuping Liu

Subjects

Physics

Topics
carbon nanotube two dimensional mechanical properties electrical properties electrical conductivity high rate electrical vehicles lithium ion battery

Electrical, Mechanical, and Capacity Percolation Leads to High-Performance MoS2/Nanotube Composite Lithium Ion Battery Electrodes. (2016)

Abstract Advances in lithium ion batteries would facilitate technological developments in areas from electrical vehicles to mobile communications. While two-dimensional systems like MoS2 are promising electrode materials due to their potentially high capacity, their poor rate capability and low cycle stability are severe handicaps. Here, we study the electrical, mechanical, and lithium storage properties of solution-processed MoS2/carbon nanotube anodes. Nanotube addition gives up to 10(10)-fold and 40-fold increases in electrical conductivity and mechanical toughness, respectively. The increased conductivity results in up to a 100× capacity enhancement to ∼1200 mAh/g (∼3000 mAh/cm(3)) at 0.1 A/g, while the improved toughness significantly boosts cycle stability. Composites with 20 wt % nanotubes combine high reversible capacity with excellent cycling stability (e.g., ∼950 mAh/g after 500 cycles at 2 A/g) and high rate capability (∼600 mAh/g at 20 A/g). The conductivity, toughness, and capacity scale with nanotube content according to percolation theory, while the stability increases sharply at the mechanical percolation threshold. We believe that the improvements in conductivity and toughness obtained after addition of nanotubes can be transferred to other electrode materials, such as silicon nanoparticles.
Collections Ireland -> Trinity College Dublin -> PubMed

Full list of authors on original publication

Jonathan N Coleman, Yanguang Li, Umar Khan, Andrew Harvey, Damien Hanlon, Xiaoyun He, Yuping Liu

Experts in our system

1
Jonathan Coleman
Trinity College Dublin
Total Publications: 217
 
2
Umar Khan
Trinity College Dublin
Total Publications: 37
 
3
Andrew Harvey
Trinity College Dublin
Total Publications: 17
 
4
Damien Hanlon
Trinity College Dublin
Total Publications: 13