Innovation Sphere

Projects Sharing Researchers



Project TitleCrumpled Graphene-Encapsulated Si Nanoparticles for Lithium Ion Battery Anodes
Track Code2013-048
Short Description

A rapid, high-throughput method to prepare crumpled capsules of graphene-wrapped Si nanoparticles for Li ion battery anode applications. #materials #graphene/graphite #energy #batteries #nanotechnology


Northwestern researchers developed a rapid, high-throughput one-step method to fabricate composite capsules made of Si nanoparticles wrapped by crumpled graphene shells. The large volume expansion of Si as a battery anode material upon the insertion of the cathode ions (Li) leads to particle surface cracking and the deposition of an insulation layer, which causes drastic battery performance deterioration. As opposed to native Si particles, the folds in the crumpled graphene shells can accommodate the volume fluctuation of the encapsulated Si. As a result, the composite capsules have greatly improved performance as Li ion battery anode in terms of capacity, cycling stability and coulombic efficiency. 

              Figure 1. Scanning electron microscopic images of composite capsules. 

 Figure 2. Performance comparison between encapsulated Si and native Si particles 

TagsENERGY: batteries, MATERIALS: graphene/graphite, nanotechnology: nanoparticles
Posted DateAug 7, 2014 12:58 PM


Jiaxing Huang* 
Hee Dong Jang 
Jiayan Luo 


Hi-performance Li ion batteries 


  • Greatly improves Li ion battery performance in terms of capacity, cycling stability and coulombic efficiency 
  • Rapid, facile and high-throughput 
  • Allows continuous mode of operation and is readily scalable
  • No requirement of extensive engineering of Si nanoparticles 
  • Concept can be extended to envelop expandable particles in other applications


IP Status

A U.S. patent application has been filed. 

Contact Information

Sarah Kamper, PhD
Invention Associate
(p) 847-491-5095


File Name Description
Figure 2.png None Download
Figure 1.png None Download