Advanced Lithium-Sulfur Battery for Electric Vehicle Applications

Internal combustion engine powered vehicles not only consume a major part of the worlds petroleum resources but also are responsible for severe air pollution. Near Zero emission electricity powered vehicles EV), hybridized electric vehicle HEV) and more recently plug-in hybridized electric vehicle PHEV) seem to be promising alternatives. However, up to date, the lack of suitable batteries and excessive cost of the power sources have hindered the development and widespread adoption of them. Driven by the strong market pull for this technology, Bettergy has invented a unique solid state electrolyte for lithium sulfur batteries, which could effectively prevent the polysulfide dissolution and shuttling, capacity fading and lithium dendrite growth. This novel solid state lithium sulfur battery promises great advantages, including 1) high energy density >400 Wh/kg); 2) high rate capability; 3) excellent cycle performance > 1000 cycles with 80% DoD); 4) low cost; 5) long calendar life >10 years) and 6) low cost. Once developed, this low cost battery can meet the stringent requirements for long range EV applications. Lithium ion batteries are now used extensively in a wide range of consumer applicationswhere high energy densities and extended cycle life are required. The global lithium ion battery market reached an estimated $9 billion in 2011 and is growing at the rate of approximately 20% per year due to rapid adoption of portable and mobile devices for personal entertainment and communication purpose. With the introduction of energy efficient EV, HEV and PHEV, experts expect that the growth of battery market will accelerate in the next decade. Upon successful completion of the current program, significant impacts are expected on the battery markets for HEV and PHEV application, as well as consumer applications. It will make the zero emission HEV and PHEV a reality, making the air much cleaner while consuming less energy and freeing our nation from relying heavily on petroleum imports. Economically, it will create a new vibrant industry and generate a tremendous number of new, highly skilled job opportunities in the United States.