NICOP - Graphene Modified Li4Ti5O12 Anode Material for Energy Storage System
Abstract
Increasing energy production from renewable energy sources implies that additional energy storage system (ESS) to accommodate those surplus power should be necessary, and more efficient and stable lithium ion batteries can be a decent candidate to meet the needs of those ESS installations. In this proposal, the researchers suggest a novel design of lithium titanate (Li4Ti5O12, LTO) with enhanced structural stability and electronic conductivity as a battery anode material adequate for ESS. Based on the National Defense Authorization Act (NDAA 2010) manifested by United States Department of Defense and the mission of Renewable Energy Program Office (REPO) founded by Department of Navy (DON), significant increase of infrastructure for renewable energy production is expected in the near future. Increasing energy production from renewable energy sources implies that additional energy storage system (ESS) to accommodate those surplus power should be necessary, and more efficient and stable lithium ion batteries can be a decent candidate to meet the needs of those ESS installations. In this proposal, we researchers suggest a novel design of lithium titanate (Li4Ti5O12, LTO) with enhanced structural stability and electronic conductivity as a battery anode material adequate for ESS. In detail, we will use graphene as carbonaceous agent to enhance the electronic conductivity by giving exterior electrical network surrounding LTO crystallites, and render mixed valence (Ti3+/Ti4+) states in LTO lattices to further increase the electronic conductivity of LTO material itself. Those enhancements could be achieved simultaneously from a simple process, by maintaining a reducing atmosphere during the solid-state reaction transforming graphene oxide-wrapped titania nanoparticles to graphene-wrapped LTO crystallites. Furthermore, we expect graphene-LTO composite materials with superior electrochemical properties by utilizing graphene with different dimensions (graphene sheet or graphene quantum dots (GQDs)). Our approach will enable LTO with high-rate capability and additional stability, which shall meet the prerequisites required for anode materials for the ESS installations. While carrying out this project, we will participate an annual academic meeting (Materials Research Society (MRS), Electrochemical Society (ECS), and American Chemical Society (ACS)) to discuss our results. In addition, we are planning to publish our work to patents and SCI journals. Ultimately, we hope our materials and design will be adopted in the power sources for ESS or EV.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Nov 23, 2016
- Source ID
- N629091612083
Entities
People
- Byungwoo Park
Organizations
- Office of Naval Research
- Seoul National University
- United States Navy