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Nanoscale materials for high-energy density lithium-ion batteries (II)

Nanoscale materials for high-energy density lithium-ion batteries (II)

Nanoscale materials for high-energy density lithium-ion batteries (II)

Nanoscale materials for high-energy density lithium-ion batteries (II)


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Home Page > Technology > Communication > Nanoscale materials for high-energy density lithium-ion batteries (II)

Nanoscale materials for high-energy density lithium-ion batteries (II)

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Posted: Aug 26, 2010 |Comments: 0

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The UC San Diego NanoEngineers will design the candidate cathode materials using “first principles calculations” – a quantum-mechanical based calculation method that enables the engineers to predict electrochemical properties of the batteries prior to synthesis.

One aspect of the batteries the engineers will predict is the structural stability of the electrode materials as the lithium concentration fluctuates during charge and discharge. Enhancing structural stability is critical for extending the life of rechargeable Dell XPS M1330 battery.

“We are pleased to be working closely with Shirley Meng on this exciting materials manufacturing project. The shortest path to developing new materials and implementing them in practical applications is for materials manufacturers to work synergistically with researchers like Prof. Meng, who can create new structures through computation and modeling,” said Dr. Ganesh Skandan, CEO NEI Corporation.

“This work, which could lead to new batteries for space exploration and beyond, is just one example of the high impact research being done in the Department of NanoEngineering,” said Kenneth Vecchio, Professor and Chair of the Department of NanoEngineering at the UC San Diego Jacobs School of Engineering. Dell Inspiron 1720 battery

Batteries for hybrid electric vehicles or full electric cars

Work in the Meng lab on next-generation batteries extends beyond the collaboration with NEI.

“In my group, we are very interested in batteries that will be used in future transportation systems. Lithium batteries for plug-in hybrid electric vehicles or full electric cars have a lot of potential, but we have to work very hard to decrease the dollar per kilowatt hour numbers,” said Meng, whose research group at UC San Diego is funded through grants from the U.S. Department of Energy (DOE) and other government and industry sources.

The new Phase II Small Business Technology Transfer contract follows a similar Phase I contract awarded to the same industry-university team.

“If we are going to use large scale batteries for applications such as electric cars, it is not acceptable to replace batteries every three years. The cycle life of the batteries becomes very important and this is a challenge to address. How do we make batteries last for ten years instead of three years? We have to look for other options for the structure of the battery materials that are more robust,” said Meng. SONY VGP-BPS2 battery

The Cathode Bottleneck

The positive electrode in lithium-ion batteries – the cathode – is one battery component ripe for additional improvements.

“The cathode is a performance bottleneck for modern lithium batteries that power consumer electronics like PDAs, mp3 players and laptops,” said Meng. “There is plenty of room for improving energy density in lithium batteries by at least another 50 percent. The problem is making these improvements under the constraints of cost. That is the main obstacle. We are looking at dollars per kilowatt hour. We need to make sure the raw materials are low cost, the synthesis process is low cost, and the packaging of the battery is low cost,” said Meng.

Moving to Manganese

The lithium ion batteries Meng’s group is working on are primarily manganese based, while most of the lithium batteries in the marketplace today are cobalt based.

“Manganese is much cheaper than cobalt, and manganese is more abundant,” said Meng. “Also, we are focusing on a different material structure for the batteries, one that is easier to make and could lead to cheaper synthesis.”

The nanoengineers in the Meng lab will be using first principles to model new nanocomposite structures for the generation of cathode materials with exceptionally high energy density.

“We explore the electrochemical properties of the batteries we design and develop to see if the experimentally measured properties match with our predictions,” said Meng. “We use this feedback mechanism to improve our computational modeling.”

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Welcome to ebattery.com.au Some laptop components, such as laptop batteries, AC adapters and dewalt tool battery, can be found in usual offline stores, but at a higher price. You can save your time and money buying components for your laptop on our site – up to 30-35% savings on a new laptop battery and other items!

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