With the growing demand for smaller digital devices with increased functionality, the trade-off-until now-has been battery life. Sony Corporation today announced the industry's first hybrid lithium ion rechargeable battery. Dubbed NexelionTM the new battery utilizes a tin-based amorphous anode; translating into a 30% increase in the capacity per volume ratio compared to conventional lithium-ion batteries, and will be commercialized initially as a battery pack for Handycam® camcorder products.

Instead of using graphite-based materials for the anode as found in conventional batteries, Sony incorporated a tin-based amorphous anode material where the lithium ion storage capacity per volume ratio has been increased by 50%, which increases the overall battery capacity by 30%.

"At Sony, ever since the commercialization of lithium ion secondary battery in 1991, the battery capacity has more than doubled from the enhanced performance of carbon based materials and other materials to be used in the anode, as well as improvements in the structure of the battery," said Masayuki Nagamine, deputy general manager of Sony Corporation's Energy Company." The newly developed tin based amorphous material is a high capacity anode material which will take the lead of the next generation lithium ion secondary battery. Technological development will be carried on, to further increase the capacity of batteries, to deal with enhanced performance as well as longer operating time of the products."

"While tin and silicon, or compounds which include these elements, enable high capacity in lithium-ion rechargeable batteries, their propensity for change in particle shape during the charge and discharge phases was drastic, requiring an improvement in the characteristics of deterioration at recycling for commercialization. Sony's development of the tin-based amorphous anode, along with a new cathode, electrolyte and battery structure, has resulted in a new generation of lithium-ion batteries with higher durability and capacity. Additionally, the Nexelion battery offers improved charge and discharge at low temperatures and quicker recharge times