The news is reported in the latest edition of The Royal Society of Chemistry journal Chemical Communications.
With recent advances in the technology of portable electronic devices, there is a demand for flexible batteries to power them.
Drs Hiroyuki Nishide, Hiroaki Konishi and Takeo Suga at Waseda University have designed the battery – which consists of a redox-active organic polymer film around 200 nanometres thick. Nitroxide radical groups are attached, which act as charge carriers.
The battery has a high charge/discharge capacity because of its high radical density.
Dr Nishide said: “This is just one of many advantages the ‘organic radical’ battery has over other organic based materials which are limited by the amount of doping.
“The power rate performance is strikingly high – it only takes one minute to fully charge the battery. And it has a long cycle life, often exceeding 1,000 cycles.”
The team made the thin polymer film by a solution-processable method – a soluble polymer with the radical groups attached is “spin-coated” onto a surface. After UV irradiation, the polymer then becomes crosslinked with the help of a bisazide crosslinking agent.
A drawback of some organic radical polymers is the fact they are soluble in the electrolyte solution which results in self-discharging of the battery – but the polymer must be soluble so it can be spin-coated.
However, the photocrosslinking method used by the Japanese team overcomes the problem and makes the polymer mechanically tough.
Dr Nishide said: “This has been a challenging step, since most crosslinking reactions are sensitive to the nitroxide radical.”
Professor Peter Skabara, an expert in electroactive materials at the University of Strathclyde , praised the high stability and fabrication strategy of the polymer-based battery.
He said: “The plastic battery plays a part in ensuring that organic device technologies can function in thin film and flexible form as a complete package.”
Dr Nishide envisages that the organic radical battery could be used in pocket-sized integrated circuit cards, used for memory storage and microprocessing, within three years.
He said: "In the future, these batteries may be used in applications that require high-power capability rather than high energy density, such as a battery in electronic devices and motor drive assistance in electric vehicles."
Tony Kirby | alfa
Supersonic waves may help electronics beat the heat
18.05.2018 | DOE/Oak Ridge National Laboratory
Researchers control the properties of graphene transistors using pressure
17.05.2018 | Columbia University
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.
Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...
A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.
Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
18.05.2018 | Power and Electrical Engineering
18.05.2018 | Information Technology
18.05.2018 | Information Technology