Flexible see-through battery power
Drs Hiroyuki Nishide, Hiroaki Konishi and Takeo Suga at Waseda University have designed a battery which consists of a redox-active organic polymer film around 200 nanometres thick. Nitroxide radical groups are attached, which act as charge carriers. Because of its high radical density, the battery has a high charge/discharge capacity. This is just one of many advantages the organic radical battery has over other organic based materials according to the researchers. 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.
Source: gizmag.comAdded: 2 April 2007