Synthesis of Carbophosphate Compounds as Cathode Materials for Lithium Ion Batteries

Technology #13945

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Inventors
Professor Gerbrand Ceder
Department of Material Science and Engineering, MIT
External Link (web.mit.edu)
Hailong Chen
Department of Material Science and Engineering, MIT
Geoffroy Hautier
Department of Material Science and Engineering, MIT
Anubhav Jain
Department of Material Science and Engineering, MIT
Byoungwoo Kang
Department of Material Science and Engineering, MIT
Robert Doe
Department of Material Science and Engineering, MIT
Managed By
Christopher Noble
MIT Technology Licensing Officer - Clean and Renewable Energy
Patent Protection

Carbophosphates and related compounds

US Patent 8,999,282
Publications
Phosphates as Lithium-Ion Battery Cathodes: An Evaluation Based on High-Throughput ab Initio Calculations
Chemistry of Materials, 2011, 23, 3495–3508
Thermal stabilities of delithiated olivine MPO4 (M = Fe, Mn) cathodes investigated using first principles calculations
Elsevier, Commun. (2010), doi:10.1016/j.elecom.2010.01.010
A Computational Investigation of Li9M3(P2O7)3(PO4)2 (M = V, Mo) as Cathodes for Li Ion Batteries
Journal of The Electrochemical Society, 159 (5) A622-A633 (2012)

Application

High-capacity cathode  materials have the ability to provide Lithium ion batteries with higher capacities and longer life cycles. Industries focusing on manufacturing batteries and other electrochemical devices would benefit from using carbophosphates as cathode materials for Lithium ion batteries.

Problem Addressed

The demand for lightweight, high energy density batteries to power vehicles and portable electronic devices continues to rise. Although many compounds have been studied for use in batteries and other applications, it remains difficult to identify those compounds with the desired thermal stability and high energy densities. Accordingly, improvements in cathode materials in batteries and other applications are still needed. This invention uses polyanionic groups to create light, yet high energy density batteries to meet the desired energy demands while keeping manufacturing costs low.

Technology

Through electronic structure modifications, this invention uses phosphate groups to raise the operating voltage of a given transition metal ion. In some cases, phosphate groups increase stability by binding oxygen more strongly in the compound. The use of relatively light polyanionic groups, such as carbonate groups, with the presence of phosphate groups can lead to relatively higher energy densities. As a result, one can create lighter yet higher energy density lithium-ion batteries through the use of carbophosphate compounds as cathode materials. 

Advantages

  • Compounds with polyanionic groups, such as carbonate and borate, are generally more stable than oxides and may release less 0at elevated temperatures, an important safety feature for lithium ion batteries
  • Lower- weight polyanionic groups may be useful for higher energy and power densities