Researchers in South Korea have discovered that silicon based anode could greatly increase the storage capacity of lithium ion batteries. This would increase run times of cell phones and laptops by 7 times. New studies are taking place using silicon which forms lithium alloys and can hold a far longer charge then graphite.which has a relatively low storage capacity. However, silicon begins to crumble after a few cycles of recharging and can no longer hold ions effectively. Jaephil Cho at Hanyang University in South Korea believes that they have solved this problem by making porous silicon that is able to accomodate the expansion and contractions of silicon. Cho's team was able to demonstrate that the porous silicon stores an electrical charge of more than 2800 milliampere hours per gram which is about seven times higher than graphite. The team is already collaborating with battery manufactuers and said that they will not take any longer to recharge then the previous battery. The highly porous structure can be filled up quickly allowing for rapid charging. This technology may eventually be used for more advanced applications such as hybrid cars.
http://www.rsc.org/chemistryworld/News/2008/November/25110801.asp
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4 comments:
3.
-Very interesting and a good insight to the future of battery use
-Detailed in describing the differences between graphite and silicon
-Provided excellent descriptions of the science behind this work
2.
- Could have had more details on the scientists
-Could have provided an opinion on the work being done
1.
-I didn't know that the people of South Korea were doing so much research in the study of power and electricity. Their work will help provide power for an increasingly mobile world
1 - good facts
2 -well organized and easy to understand
3 - nice summary
1- your opinion?
2 - could provide more info on those doing the experiments
1 - i have learned that silicon held ions more effectively than graphite.
This summary was very well written, it was also a very interesting topic, and was very descriptive.
This could have been better if had more of a background as to why they are truing to use silicon instead of graphite; also it could have described more on how long this experiment has been going on for.
From the article and the summary I learned that with these new batteries, the devices which use them will be more lightweight and smaller, while still working properly.
1. Very intersting topic
2. Great explanation
3. Very Descriptive
1. Explain just a little more
2. How it works?
1. I learned that there is now a silicon alternate to batteries which allow the batter to work much longer
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