Email Login
Community
News | Research | DeepLearning | Seminar | Q&A

Graphene Could Help Generate Power From Rain

GreatMind 2016.04.08 12:11 조회 수 : 740

By Charles Q. Choi

Posted 6 Apr 2016 | 16:00 GMT

 
iStockphoto71004529-1459863429937.jpgPhoto: iStockphoto

Solar cells could someday generate electricity even during rainshowers with the help of graphene, scientists say.

 

Rain helps solar cells operate efficiently by washing away dust and dirt that block the sun’s rays. Still, photovoltaic cells depend on light to produce electricity, and so generate a negligible amount of power when there are clouds overhead.

 

But researchers in China wondered whether it would be possible to create all-weather solar cells. “We would like to develop a solar cell that can be triggered by sun and rain,” says study lead author Qunwei Tang, a materials scientist at Ocean University of China in Qingdao.

 

So, how do you generate current from rain? Raindrops are not pure water. They contain salts that split up into positive and negative ions. To manipulate that bit of chemistry, the Ocean University researchers turned to graphene, the one-atom-thick sheets of carbon. Graphene's electrons can attract the positively charged ions, such as sodium, calcium and ammonium. The result: separated layers of positive and negative ions that act much like a capacitor to store energy.

 

With that in mind, the scientists added graphene to a dye-sensitized solar cell, a kind of inexpensive thin-film solar cell, then put them on a flexible, transparent backing of indium tin oxide and plastic. The resulting flexible solar cell demonstrated a solar-to-electric conversion efficiency of up to 6.53 percent, and generated hundreds of microvolts from slightly salty water that was used to simulate rainwater. “Future solar cells may produce electricity in all weather,” Tang says.

 

The scientists detailed their findings on the possibility of a rainy day solar cell in the 21 March online edition of the journal Angewandte Chemie International Edition.

Future research will investigate how to handle the variety of ions found in rain, as well how to generate electricity from the low concentrations of these ions typically seen in rainwater, Tang says

번호 제목 글쓴이 날짜 조회 수
공지 2019 IVPL 송년회 [1] yjchoi 2019.12.20 347
공지 [한국과총]글로벌 현장연수 참가자 모집 GreatMind 2018.04.04 371
공지 Inform Your Students: Global Student Challenge. Over US$2,000 in Prizes! GreatMind 2017.01.12 4432
공지 nVidia Parallel Computing Software Engineer 채용 GreatMind 2016.11.16 798
29 GTC Korea 2016 (코엑스 인터컨티넨탈호텔)...!!!!! GreatMind 2016.08.26 480
28 Bringing Big Neural Networks to Self-Driving Cars, Smartphones, and Drones GreatMind 2016.04.08 494
27 [News] IVPL 김병규 교수 2018 연구/산학협력 우수교원으로 선정....!!!! GreatMind 2018.12.17 523
26 Scopus Newsletter: CiteScore metrics Special Edition..!!! GreatMind 2016.12.16 533
25 [News] Prof. Lee Kye-Shin has visited to our group.....!!!! file GreatMind 2016.07.05 554
24 Google Is Helping the Pentagon Build AI for Drones GreatMind 2018.03.09 557
23 Graphene Wristband Senses Your Blood Sugar—and Treats It [1] GreatMind 2016.04.09 606
22 [News] Congratulations..!!!! Young-Ju Choi's research paper has been accepted for presentation in ACiVS 2020 (Auckland, New Zealand)!!! GreatMind 2019.11.09 645
21 [News] Mr. Kim Hyun-Teak visited to our lab. to collaborate with us..!!! [12] file GreatMind 2018.02.12 706
» Graphene Could Help Generate Power From Rain GreatMind 2016.04.08 740
19 카이스트, 모바일용 딥 러닝 AI반도체 개발 GreatMind 2018.03.06 748
18 JPL's AI-Powered Racing Drone Challenges Pro Human Pilot GreatMind 2017.12.20 751
17 nVidia Parallel Computing Software Engineer 채용 GreatMind 2016.11.16 798
16 [Notice] Dr. Kalyan's paper has been accepted as minor revision in IEEE Transactions on Industrial Electronics...!!! GreatMind 2017.12.26 811
15 Automatic emergency braking systems need 180-degree frontal vision to help cars avoid hitting cyclists..!!! GreatMind 2018.05.10 819
14 [Notice] Mr. Park's paper has been accepted with minor revision in Displays Journal (Elsevier)...!! GreatMind 2016.05.11 858
13 NVIDIA AI CONFERENCE 2019 GreatMind 2019.06.21 919
12 [Notice] Mr. Lee Jong-Hyeok has been nominated in Marquis Who's Who in the World ...!! GreatMind 2017.09.07 1109
11 Carnegie Mellon Solves 12-Year-Old DARPA Grand Challenge Mystery..!!! GreatMind 2017.10.26 1120
10 [News] Congratulation...!!! Dr. Kalyan's paper has been accepted for publication in the IEEE Transactions on Industrial Electronics...!!! GreatMind 2018.03.02 1201