For the past two decades Lithium-ion batteries have become the primary technology powering the rapid growth of portable electronics and more recently electronic vehicles. The demand for ever increasing range, power, and performance of these devices has created a problem through the fact that lithium-ion batteries have not been able to sustain pace with the technologies they power. As a result batteries have become the largest single component in portable electronics and the most expensive component in electric vehicles.
The market for LIB in electronic devices is about $10 bn in 2012, growing at 5-7% annually, and that for transportation is expected to grow from $2-4 bn in 2012 to $14 bn in 2017 . In all cases, significantly improved battery performance would help realize these market growth potentials.
SiNode technology was developed and patented by Dr. Harold H. Kung and his students at Northwestern University. The technology utilizes a composite material of silicon nano-particles and graphene in a layered structure. In effect, the flexible graphene scaffolds of our composite materials eliminate the rapid degradation of performance associated with silicon-based anode materials. In addition, in-plane nano-engineered porosity is introduced to the graphene layers, allowing rapid ionic diffusion through the structure.
SiNode exhibits these unique attributes:
- mechanically flexible
- electronically conductive
- abundant charge carrying capacity
- excellent high-rate lithium-ion storage capabilities
Superior Energy Capacity
The initial capacity of SiNode anodes is aproximately 3200 mAh/g almost 10x that of current graphite anodes (370 mAh/g). High energy density SiNode anodes allow for both a smaller battery form factor and extended range of use.
Superior High Power Performance
From normal to extreme power needs, SiNode’s unique structure allows for safe and rapid charge movement. This performance opens up the possibility of high efficiency EVs and smart phones that can charge in minutes. Considerable optimization remains and performance is expected to continue improving.
In comparison to other competing anode technologies, SiNode has a unique advantage as a highly scalable and low cost solution for large-scale production. Much of the synthesis procedure for porous graphene scaffold and the resulting composite relies on solution-based chemistry (modified Hummers’ method). Readily available industrial equipment such as drying oven and centrifuges can be used to maximize efficiency during scaled production. No specialized or custom-made machinery is necessary for any step of the production process.
Furthermore, the unique characteristics of our anode provide a number of manufacturing advantages and could eliminate the need for certain components required by current Li-ion batteries.