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Wood battery could be the future of large energy storage

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Forum topic by EPJartisan posted 07-13-2013 06:21 PM 554 views 0 times favorited 3 replies Add to Favorites Watch
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EPJartisan

1066 posts in 1811 days


07-13-2013 06:21 PM

Article from TreeHugger.com

As we look toward a future of more renewable energy being fed into the grid, having reliable energy storage to back up intermittent wind and solar will be necessary for everything to run smoothly. That’s why researchers have been working hard to find the best type of battery for this type of large-scale storage. Lithium-ion batteries are great for gadgets and even cars, but on a larger scale they’re too expensive and aren’t very environmentally friendly.

Many researchers believe sodium-ion batteries are the answer. Sodium is cheap and environmentally benign and sodium-ion batteries would be well-suited for storing large amounts of renewable energy at once. The major obstacle to advancing these batteries has been a very short life due to the swelling of the anode with each charge and discharge of sodium ions, which when using a brittle base, causes the battery to fall apart after only about 20 charge cycles.

Researchers at the University of Maryland have developed a solution to this problem by using a paper-thin layer of wood fibers coated with conductive carbon nanotubes as the base in a sodium-ion nanobattery. The wood is able to withstand the swelling and contracting of the anode and allows the battery to survive more than 400 charge cycles, which makes it one of the longest lasting nanobatteries.

“The inspiration behind the idea comes from the trees,” said Liangbing Hu, an assistant professor of materials science. “Wood fibers that make up a tree once held mineral-rich water, and so are ideal for storing liquid electrolytes, making them not only the base but an active part of the battery.”

At the end of the charging cycles, the wood was wrinkled, but still intact. Computer models showed that those wrinkles relaxed the stress in the battery during charging and recharging, creating a flexible and long-lasting battery.
© University of Maryland

-- " 'Truth' is like a beautiful flower, unique to each plant and to the season it blossoms ... 'Fact' is the root and leaf, allowing the plant grow and bloom again."


3 replies so far

View Buckethead's profile

Buckethead

1930 posts in 555 days


#1 posted 07-13-2013 06:34 PM

Interesting share. One day I hope to generate my own energy for my own shop. I’m a dreamer like that. Perhaps technology like this can help that daydream become a reality.

-- Bucket, any person that spends 10k on a bicycle is guaranteed to be a $@I almost started to like you. -bhog

View Jim Jakosh's profile

Jim Jakosh

11722 posts in 1792 days


#2 posted 07-16-2013 11:31 PM

Neat. It is interesting what they will come up with. But if we got away from Lithium, we would not have a reason to stay in Afghanistan!!

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Mark Shymanski's profile

Mark Shymanski

5113 posts in 2399 days


#3 posted 07-18-2013 10:54 PM

Wouldn’t it be something if they bred trees for this purpose that required planting in alkali soil, thus restoring the soil by removing the alkalis and providing a source of well suited battery wood.

-- "Checking for square? What madness is this! The cabinet is square because I will it to be so!" Jeremy Greiner LJ Topic#20953 2011 Feb 2

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