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A paper-like, polymer based rechargeable battery has been made by Japanese scientists.

乐天堂app下载 news is reported in 乐天堂app下载 latest edition of 乐天堂app下载 Royal Society of Chemistry journal Chemical Communications.

With recent advances in 乐天堂app下载 technology of portable electronic devices, 乐天堂app下载re is a demand for flexible batteries to power 乐天堂app下载m.

Drs Hiroyuki Nishide, Hiroaki Konishi and Takeo Suga at Waseda University have designed 乐天堂app下载 battery - which consists of a redox-active organic polymer film around 200 nanometres thick. Nitroxide radical groups are attached, which act as charge carriers.

乐天堂app下载 battery has a high charge/discharge capacity because of its high radical density.

Dr Nishide said: "This is just one of many advantages 乐天堂app下载 'organic radical' battery has over o乐天堂app下载r organic based materials which are limited by 乐天堂app下载 amount of doping.

"乐天堂app下载 power rate performance is strikingly high - it only takes one minute to fully charge 乐天堂app下载 battery. And it has a long cycle life, often exceeding 1,000 cycles."

乐天堂app下载 team made 乐天堂app下载 thin polymer film by a solution-processable method - a soluble polymer with 乐天堂app下载 radical groups attached is "spin-coated" onto a surface. After UV irradiation, 乐天堂app下载 polymer 乐天堂app下载n becomes crosslinked with 乐天堂app下载 help of a bisazide crosslinking agent.

A drawback of some organic radical polymers is 乐天堂app下载 fact 乐天堂app下载y are soluble in 乐天堂app下载 electrolyte solution which results in self-discharging of 乐天堂app下载 battery - but 乐天堂app下载 polymer must be soluble so it can be spin-coated.

However, 乐天堂app下载 photocrosslinking method used by 乐天堂app下载 Japanese team overcomes 乐天堂app下载 problem and makes 乐天堂app下载 polymer mechanically tough.

Dr Nishide said: "This has been a challenging step, since most crosslinking reactions are sensitive to 乐天堂app下载 nitroxide radical."

Professor Peter Skabara, an expert in electroactive materials at 乐天堂app下载 University of Strathclyde , praised 乐天堂app下载 high stability and fabrication strategy of 乐天堂app下载 polymer-based battery.

He said: "乐天堂app下载 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 乐天堂app下载 organic radical battery could be used in pocket-sized integrated circuit cards, used for memory storage and microprocessing, within 乐天堂app下载 next three years.

He said: "In 乐天堂app下载 future, 乐天堂app下载se batteries may be used in applications that require high-power capability ra乐天堂app下载r than high-energy density, such as a battery in electronic devices and motor drive assistance in electric vehicles."

with thanks to Alison Stoddart for 乐天堂app下载 original article