Electrode and Electrolyte Materials for Li-ion Batteries (09-009)

Market Overview:

These solid state Li-ion battery materials utilize large electropositive cations in the formation of transition metal phosphate frameworks, resulting in electrode materials with the ability to store more charge and deliver higher power outputs.  The demand for high-power batteries for mobile devices and automotive applications is continually growing, with a shift towards cleaner and more efficient fuels and power options. Reflective of this demand, the Li-ion battery market has an estimated worth of $29.98 billion and is expected to more than double in the next 10 years.  Clemson University researchers have engineered a method of creating new Li-ion battery materials, developing new cathode materials with improved charge and discharge characteristics.  Another component is the open-framework solids that possess superior ion transport properties pertinent to the electrochemical performance of next-generation electrode materials for battery devices.

Application                                                                  Stage of Development

Automotive batteries for hybrid/electric vehicles,       Functional Prototype

portable electronics, medical devices

Advantages

•       Novel synthesis of materials allows for more targeted development, creating batteries to meet specific applications.

•       The cathode materials have superior properties compared to current Li-ion phosphate materials, delivering higher power and storing more charge.

Technical Summary

This technology consists of new strategies for the synthesis of a novel family of electrode and electrolyte materials possessing enhanced capacities useful for primary and secondary battery device applications.  The general formula is AxM(XOz)n, whereas A = monovalent alkali metal cation and silver; M = first-row transition metal cation; X = P, As, V.  The strategy employed for the synthesis of Ag+-based cathode materials deals with the incorporation of transition metal cations possessing multiple oxidation states comparable with reduction potentials of Ag2V4O11 (SVO). SVO is a state-of-the-art commercial material for the high-rate/power primary Li-ion battery applications in medical devices such as implantable cardioverter defibrillators (ICDs).  The new materials have extended capacity at ~3 V due to the reductions of Ag(1+) to Ag(0) and M(n+) to M(m+)/Mn+ (n = m + a, a ≥ 1).  For the secondary battery materials, the use of combined solid state and soft (ion-exchange) chemistries facilitates the development of new open-framework solids that otherwise cannot be isolated via direct synthesis. Additionally, these materials exhibit facile ion-transport.

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Inventors:                        Dr. Shiou-Jyn Hwu

Patent Type:                    Utility

Serial Number:                13/201,238

CURF Ref No:                2009-009

Patent Information:
Category(s):
Advanced Materials
For Information, Contact:
Chris Gesswein
Director of Licensing
Clemson University Research Foundation
agesswe@clemson.edu
Inventors:
Shiou-Jyh Hwu
Gregory Becht
Keywords:
Automotive
Electronics
Power and Energy
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