History of Lithium-Ion Batteries

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History of Lithium-Ion Batteries

Rechargeable battery evolution accelerated as the world transitioned to instruments enabled by silicon microchip technology from those of bulky electrical components. Mobile devices were designed to be powered by lightweight energy storage systems. The development of batteries for this rapidly evolving market was challenging:

• The nickel cadmium battery had been the only option for modern electronics for many years. It was a great improvement over carbon batteries.

• Later, nickel-hydride batteries became the technology of choice.

• Lithium-ion batteries became available in the 1990s, offering higher energy densities. This technology won out nickel-hydride.

The lithium-ion rechargeable battery offered advantages that were previously unavailable:

• Lithium is the lightest of all metals

• It had the largest electrochemical potential

• It provided the greatest energy content per unit volume

• It had no memory effect

• Its energy leakage rate was less than half that of NiCd and NiMH

• The first of its type was developed by Sony in 1990 with enough cycles to be usable for rechargeable batteries

o Mass production took place in 1991

o Panasonic and Sanyo quickly developed similar batteries that were on the market by 1994

Big advances in a mature industry like batteries were hard to find. Advances in the field focused only on finding slightly better materials or thinning the layers to improve performance.

Pre-A123 Systems: History of Lithium-Ion battery Innovation

Pre-A123 research group

Professor Yet-Ming Chiang directed a mid-sized research group at MIT that focused on design, synthesis and characterization of advanced inorganic materials; particularly toward electromechanically and electrochemically active materials. These materials can be defined as being capable of converting electrical energy into mechanical work, and of converting chemical energy into electrical work.

Chiang’s group began researching better lithium cathode materials in the mid-1990s. By early 2000, the group began wondering if there might be a new way to push the thickness limitations of battery cells. The wondered if battery layers could form themselves based on the Hamaker Constant for Different Materials. Materials in this case are very small particles. The Hamaker Constant is the measure of force between materials.

Hamaker Constant applied to designing an innovative battery system

Chiang describes how this related to the challenge of revolutionizing battery technology:

• “…the Hamaker Constant can have a negative value and cause two materials (particles) to repel each other if immersed in the right medium… we discovered and designed materials systems that organized themselves into an electrolyte separator between the anode and cathode.

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