Improving Supercapacitor Performance

Improving Supercapacitor Performance
Improving Supercapacitor Performance

Supercapacitor Performance Versus The Modern Battery.

Batteries store energy by using a chemical reaction. This reaction is often reverible so that if you flow electricity back through the battery it will reverse the chemical reaction and be ready to produce electricity again. Energy charging and discharging from batteries has an inheriant time delay depending on the battery design and chemistry.

This time delay can impact performance of the devices that you are powering.

This is especially true for electic vehicles. The electric motor drive systems are capable of instantanous maximum torque if powered from a fast reacting source such as a supercapacitor. So what is a supercapacitor?

A supercapacitor which is sometimes ultracapacitor or electric double-layer capacitor (EDLC)) is a high-capacity electrochemical capacitor with capacitance values much higher than other capacitors (but lower voltage limits) that bridge the gap between electrolytic capacitors and rechargeable batteries

New research into supercapacitors is focused on making them cheaper and more effective. Here is the latest results from a team from the University of Tehran, Nano-fabricated Energy Devices Lab.

Supercapacitor design and performance

Applying electric field in the ammonium based solution has been used for the fabrication of different forms of copper hydroxide nanostructures. The supercapacitance performance of synthesized nanostructures has been investigated and high specific capacitance of 178 F/g at scan rate of 20 mVs-1 was obtained. The fast, simple and low cost electric field enhanced synthesis method proposed here can be used for fabrication of high performance Cu(OH)2 nanostructured supercapacitance electrodes.

Copper based nano structures have gained much attention in today’s modern devices. A team of Nano-fabricated Energy Devices lab in University of Tehran have used an ultra-fast and simple method for fabrication of different types of these structures. By applying electric field in the ammonium hydroxide based solutions dense arrays of copper based nanostructures in short duration of time in the order of below 1 min (or even in the order of just 1 second) have been achieved.

In addition, electrochemical properties of the fabricated nanostructures have been investigated, showing specific and areal capacitances larger than other reports on copper hydroxide electrodes.

We believe that these structures have great potential for energy devices, such as supercapacitors and lithium ion batteries.

This research was funded in part by Iran National Science Foundation (INSF).

Authurs of this paper are Sajad Sepahvand from University of Tehran, Nano-fabricated Energy Devices Lab, Dr. Shahnaz Ghasemi from Sharif University of Technology, Institute of Water and Energy, and Dr. Zeinab Sanaee from University of Tehran, Nanofabricated Energy Devices Lab. Corresponding authur for this study is Dr. Zeinab Sanaee, [email protected].

The paper can be found in NANO journal.

Here is some more useful information on supercapacitors.

About Gordon Smith
Gordon's expertise in the area of industrial energy efficiency and alternative energy. He is an experienced electrical engineer with a Masters degree in Alternative Energy technology. He is the co-founder of several renewable energy media sites including Solar Thermal Magazine.

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