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Project TitleManganese Oxide Anode Material for Lithium Ion Batteries
Track Code5187
Short Description

A method to prepare nanosized Mn3O4 as a low-cost, high-performing and safe anode material for rechargeable lithium batteries is provided.

Abstract

Rechargeable lithium batteries have revolutionized portable electronic devices. They are also increasingly being pursued for electric and hybrid electric vehicle applications. A major concern about lithium batteries is safety. While graphite dominates the market for anode materials, it presents safety concerns if the battery is overcharged or charged at a high rate, due to possible lithium plating and/or formation of highly reactive lithium dendrites that could pierce the separator and lead to short circuiting of the cell.

 

This invention provides a sponge-like anode material for rechargeable lithium batteries with better safety performance and a more attractive voltage. The re-lithiation voltage of Mn3O4 (- 0.6 V) is higher than that of typical graphitic carbon (below 0.2 V). This feature essentially precludes lithium deposition. Mn3O4 also possesses lower operating voltages (average potentials -1.3 V on de-lithiation, 0.6 V on lithiation) than Co3O4 (2.1 V on de-lithiation, 1.2 V on lithiation). When combined with a specific cathode, the full-cell operating voltage and consequently the energy density will be higher.

 

The preparation process is simple and involves only inexpensive and readily available raw materials with no need for special equipment. More importantly, the prepared Mn3O4 anode not only provides a high initial reversible capacity (869 mAhlg) and coulomb efficiency (65 %), but also demonstrates very good cycling performance.

 

Potential Commercial Applications:

  • Lithium-ion batteries for use in consumer electronics, electric vehicles, military and aerospace applications

 

Advantages:

  • Excellent electrochemical performance
  • Readily available, inexpensive materials
  • Safety
 
Tagsalternative & green energy, Novel Processes, materials, physical science, batteries
 
Posted DateSep 13, 2012 10:02 AM

Researcher

Name
Michael Lowe
Jie Gao
Hector Abruna

Additional Information

Licensing Contact

Carolyn Theodore
cat42@cornell.edu
607-254-4514