Time filter

Source Type

Sugibayashi T.,Green Innovation Research Laboratories
NEC Technical Journal | Year: 2012

NEC is attempting to develop electronic equipment featuring both convenience and without standby power consumption by means of non-volatile logic technology using spintronic devices. NEC also expects that applying this technology in the wireless sensor terminals used for example in energy management systems will extend the battery replacement intervals significantly and thereby render the systems virtually maintenance-free.

Iwasa S.,Green Innovation Research Laboratories | Yasui M.,Green Innovation Research Laboratories | Nishi T.,Green Innovation Research Laboratories | Nakano K.,Green Innovation Research Laboratories
NEC Technical Journal | Year: 2012

The organic radical battery is a secondary battery using a plastic material containing stable radicals. It charges and discharges by the oxidation and reduction of radical species such as a nitroxyl radical. This battery features a highpower discharge capability and a flexible structure. In a high-power pulse discharge test, the thin organic radical battery presented no degradation in cell resistance even after 10,000 times of continuous pulse discharge (1-second pulses). The thin and flexible organic radical battery is considered particularly suitable for supplying power to compact ubiquitous devices in the future such as the highly functional smart card.

Kawasaki D.,Green Innovation Research Laboratories | Ishikawa H.,Green Innovation Research Laboratories | Sudo S.,Green Innovation Research Laboratories | Utsugi K.,Green Innovation Research Laboratories
NEC Technical Journal | Year: 2012

NEC Green Innovation Research Laboratories have developed a lifetime extension technology for laminated lithium-ion batteries (LIBs) using manganese positive electrodes featuring safety and high abundance as a resource. This technology uses a NEC-original electrolyte additive and maintains a capacity of 85% even after about 20,000 cycles (1,435 days). Based on the test results, including the above data, a lifetime prediction simulation was performed with an LIB drive pattern assuming the battery-charge from a commercial power supply at nighttime. It was concluded that in the Tokyo area the period until the capacity is halved from the initial capacity is 32 years. This paper introduces the activities summarized above.

Discover hidden collaborations