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Quick Charging Li-Ion Batteries Using Graphene

clock August 21, 2012 01:10 by author Ty

Development of a new type of battery using the world’s thinnest material could power our future devices with fast charge and discharge rates. Currently, we are using today’s lithium ion (Li-Ion) battery technology to power our laptops, tablets, cell phones, digital cameras, camcorders, and other portable electronic devices.  Current Li-Ion batteries mark today’s industry standards. R&D engineering researchers at Rensselaer Polytechnic Institute are taking Li-ion battery technology to the next level.  Intentionally blemished graphene paper is used to create quick-charging Lithium-ion batteries with a high power density.

Graphine Batteries

Graphene is an allotrope of carbon, which is structurally modified by bonding atoms together from the element in a different manner. Conventional Li-ion battery cells use carbon, metal oxide, and a lithium salt electrolyte in an organic solvent. Graphite is the most popular electrode material in batteries. The graphite is replaced with graphene paper, which has been photo-flashed and zapped with lasers to increase blemishes, countless cracks, pores, and other imperfections. This will transform the graphene paper and new battery design with high-rate capable anodes for lithium-ion batteries.

Graphine Li-Ion Battery

With the success of a high power density graphene Li-ion battery pack, holding large quantities of power, quickly holding charge and releasing this energy would bring a huge solution. Complex paring of Li-ion batteries and the use of super capacitors wouldn’t need to be extensively used in electric cars. A new graphene Li-ion battery pack with large power densities and energy densities would allow very fast charge and discharge rates. Imagine fast charging hybrid cars, all-electric cars, and solar powered vehicles becoming a reality.  Quick charging laptops, tablets, cell phones, cameras and mobile devices wouldn’t need to be recharged overnight. The world would be a very mobile place, without the need of an electrical outlet every few hours.

Sources:

Batteries Made From World’s Thinnest Material Could Power Tomorrow’s Electric Cars

Photothermally Reduced Graphene as High-Power Anodes for Lithium-Ion Batteries



Battery Charging and Energy Capacity Could Increase Tenfold

clock November 30, 2011 01:10 by author Jeremy

A recent groundbreaking study has led to success in increasing charging capacity and speed of lithium ion batteries. Professor Harold Kung and his group of engineers at Northwestern University have accomplished this feat by adjusting graphene layers, which are directly related to how fast charging can occur. Now, charging capcity and speed increase by a factor of ten, just by poking small holes in the battery's graphene layers.

Additionally, Kung's team also increased the density of lithium ions, which allowed for their test-batteries to last for over a week on a single charge. (The science behind it isn't so simple, of course.) The downside is that these lithium-ion batteries lost their fast-charging long-lasting abilities after roughly 150 charges, which is a drastic difference in how long lithium-ion batteries normally last.

If perfected, this science could help create the next generation lithium-ion battery. Check out the source link below for more info.

Source: northwestern.edu



Li-ion batteries and Solar Power used on US Military Unmanned Space Shuttle

clock April 23, 2010 18:34 by author Ty

The new X-37B unmanned space shuttle launched today and will be remotely controlled. What’s interesting is that the X37B electronics is powered by lithium-ion batteries and solar cells. This replaces the traditional craft that uses a fuel cell system to generate power. Li-ion batteries have great energy to weight ratios, a slow loss of charge and a large capacity for power.

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