Voltage-Responsive Coating for Lithium-Sulfur Battery

Tech ID: 31826 / UC Case 2013-764-0


Researchers in the UCLA Department of Chemical and Biomolecular Engineering have developed a lithium-sulfur battery that overcomes the poor recharging and short lifespan problems common among other lithium-sulfur battery configurations.


Lithium ion batteries are widely used in applications ranging from portable electronics to electric cars but offer only limited charge capacity and contain relatively expensive materials. Lithium-sulfur (Li-S) batteries have been considered an attractive alternative because they present superior energy density with lower raw material cost. Current Li-S batteries, however, suffer from self-discharge, fast capacity fading, poor cycling life, and rapid reduction in efficiency. There is a need for improved Li-S technologies to advance rechargeable battery performance and use.


UCLA researchers have developed a battery with a sulfur-containing cathode that provides improved capacity retention with repeated charge-discharge cycles. The key to the invention is applying a voltage-responsive metal compound to the cathode to inhibit outward diffusion of polysulfide compounds, while allowing transport of lithium ions. Devising a means of controlling these mechanisms has limited other attempts to develop practical Li-S battery designs.


  • Li-S batteries for high energy applications 
    • Electric vehicles 
    • Portable electronics 
    • Portable tools


  • High specific density 
  • Low cost 
  • Long cycling life

Patent Status

Country Type Number Dated Case
China Published Application WO2014182281 11/13/2014 2013-764

Additional Patent Pending


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  • Lu, Yunfeng

Other Information


Lithium, sulfur, battery, renewable, green, electric vehicle, polymer, silicone, solid electrolyte, metal oxide, cathode, coating

Categorized As