Supercapacitor promises storage, high power and fast charging

May 05, 2020

A new supercapacitor based on manganese oxide could combine the storage capacity of batteries with the high power and fast charging of other supercapacitors, according to researchers at Penn State and two universities in China.

"Manganese oxide is definitely a promising material," said Huanyu "Larry" Cheng, assistant professor of engineering science and mechanics and faculty member in the Materials Research Institute, Penn State. "By combining with cobalt manganese oxide, it forms a heterostructure in which we are able to tune the interfacial properties."

The group started with simulations to see how manganese oxide's properties change when coupled with other materials. When they coupled it to a semiconductor, they found it made a conductive interface with a low resistance to electron and ion transport. This will be important because otherwise the material would be slow to charge.

"Exploring manganese oxide with cobalt manganese oxide as a positive electrode and a form of graphene oxide as a negative electrode yields an asymmetric supercapacitor with high energy density, remarkable power density and excellent cycling stability," according to Cheng Zhang, who was a visiting scholar in Cheng's group and is the lead author on a paper published recently in Electrochimica Acta.

The group has compared their supercapacitor to others and theirs has much higher energy density and power. They believe that by scaling up the lateral dimensions and thickness, their material has the potential to be used in electric vehicles. So far, they have not tried to scale it up. Instead, their next step will be to tune the interface where the semiconducting and conducting layers meet for even better performance. They want to add the supercapacitor to already developed flexible, wearable electronics and sensors as an energy supply for those devices or directly as self-powered sensors.
Cheng Zhang is now an assistant professor at Minjiang University, China. The second Chinese university is Guizhou Education University. The paper is "Efficient Coupling of Semiconductors into Metallic MnO2@CoMn2O4 Heterostructured Electrode with Boosted Charge Transfer for High-performance Supercapacitors."

The National Natural Science Foundation of China and the Science Research Fund of Guizhou Province, China supported this research.

Penn State

Related Manganese Articles from Brightsurf:

Stellar explosion in Earth's proximity
When the brightness of the star Betelgeuse dropped dramatically a few months ago, some observers suspected an impending supernova - a stellar explosion that could also cause damage on Earth.

Lightweight green supercapacitors could charge devices in a jiffy
In a new study, researchers at Texas A&M University have described their novel plant-based energy storage device that could charge even electric cars within a few minutes in the near future.

Manganese single-atom catalyst boosts performance of electrochemical CO2 Reduction
A research team led by Prof. ZHANG Suojiang from the Institute of Process Engineering (IPE) of the Chinese Academy of Sciences prepared a manganese (Mn) single-atom catalyst (SAC) with Mn-N3 site supported by graphitic C3N4, which exhibited efficient performance of CO2 electroreduction.

Way, shape and form: Synthesis conditions define the nanostructure of manganese dioxide
Scientists at Tokyo Institute of Technology explore a novel and simplistic method to synthesize manganese dioxide with a specific crystalline structure called β-MnO2.

Bacteria with a metal diet discovered in dirty glassware
Newfound bacteria that oxidize manganese help explain the geochemistry of groundwater.

Higher manganese levels in early pregnancy linked to lower preeclampsia risk
An analysis of data from more than 1,300 women followed prospectively through pregnancy found that women with lower levels of the essential mineral manganese in early pregnancy were more likely to develop the serious high blood pressure syndrome called preeclampsia in late pregnancy.

Supercapacitor promises storage, high power and fast charging
A new supercapacitor based on manganese oxide could combine the storage capacity of batteries with the high power and fast charging of other supercapacitors, according to researchers at Penn State and two universities in China.

Topological materials for information technology offer lossless transmission of signals
New experiments with magnetically doped topological insulators at BESSY II have revealed possible ways of lossless signal transmission that involve a surprising self-organisation phenomenon.

Scientists link decline of baltic cod to hypoxia -- and climate change
If you want to know how climate change and hypoxia -- the related loss of oxygen in the world's oceans -- affect fish species such as the economically important Baltic cod, all you have to do is ask the fish.

Secure printing with water-based invisible ink
Researchers in China have developed a rewriteable paper coating that can encrypt secret information with relatively low-tech invisible ink -- water.

Read More: Manganese News and Manganese Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to