Lithium Ion Batteries

 

Since commercialization of lithium-ion batteries in the early 1990s, negative electrode chemistry has remained largely unchanged.  Improvements in cell energy densities have been achieved through cell engineering, but to further improve energy density new electrode materials are required. 

Alloy negative electrodes offer a high volumetric capacity towards Li and often comprise cheap and abundant materials.  One of the main concerns in alloy negative electrode research is the large volume expansion on lithiation, leading to loss of contact with current collector, pulverizaion of the electrode, and ultimately, poor cycle life.  Efforts in our group focus on creating high capacity alloy materials with improved cycle life.    

Projects in our lab include:

  • High capacity alloy negative electrode development
  • Active/inactive and active/active nano-composite electrode development
  • Combinatorial studies of alloy negative electrode materials
  • Microporous negative electrode materials