High-capacity Lithium/Dissolved Polysulfide Cells
Physical Sciences : Materials and Compounds
Available for licensing
- Arumugam Manthiram, Ph.D. , Mechanical Engineering
- Yongzhu Fu , Texas Materials Institute
Rechargeable lithium-sulfur (Li-S) batteries currently use sulfur composite cathodes. Compared to other transition metal oxide cathode materials used in lithium-ion batteries, sulfur cathodes provide ten times higher theoretical capacity, enabling Li-S batteries to provide higher energy density than current lithium-ion batteries. However, there are many challenges impeding the commercialization of Li-S batteries, such as low electrical conductivity, low utilization of active material within electrodes, low efficiency, and poor cyclability. To overcome these difficulties, there has been extensive investigation on sulfur-carbon and sulfur-conductive polymer composite cathodes. However, these materials suffer from poor cycle life, low utilization of active material, and high cost, and require an energy-intensive synthesis process.
Researchers at The University of Texas at Austin have designed a lithium-dissolved polysulfide battery utilizing polysulfide-containing catholyte and a binder-free, free-standing carbon electrode. Such a battery offers a capacity which is more than double that of conventional sulfur cathodes, high cyclability, and high efficiency (>95%). The preparation method is also low-cost, easily scalable, low-energy consumption, and environmentally benign.
- High specific capacity
- Better cyclability
- High efficiency
- Lithium/dissolved polysulfide rechargeable battery
- Advancement of Li-S technology in terms of efficiency and capacity
Rechargeable, portable batteries; electrochemical energy storage systems for large-scale grid energy storage; flow battery systems; vehicle batteries
- 1 U.S. patent issued: 9,444,119