Abstract: The present disclosure provides a negative electrode for use in a lithium-ion secondary battery capable of protecting the negative electrode from breakage and cracks due to expansion and contraction of an Si-based negative electrode active material. The negative electrode is for use in a lithium-ion secondary battery and includes a negative electrode current collector and a negative electrode active material layer formed on the negative electrode current collector. The negative electrode active material layer contains, as a negative electrode active material, an Si-based negative electrode active material including Si as a component and capable of reversibly absorbing and releasing lithium ions. The negative electrode further includes a high-molecular-weight organic compound for improving durability of the lithium-ion secondary battery. The high-molecular-weight organic compound has a weight-average molecular weight of 1000 or higher.

Abstract: A nonaqueous electrolyte for use in a lithium-ion secondary battery, capable of reducing gas generation due to degradation of nonaqueous electrolyte, is provided. The nonaqueous electrolyte disclosed herein is for use in a lithium-ion secondary battery wherein a negative electrode active material in a negative electrode includes at least one of a Si-based negative electrode active material including Si as a component and capable of reversibly absorbing and releasing lithium ions or a graphite-based carbon negative electrode active material. The nonaqueous electrolyte contains a nonaqueous solvent and an electrolyte dissolved in the nonaqueous solvent, and further contains a cyclic carbonate and a high-molecular-weight organic compound having a weight-average molecular weight of 1000 or higher.

Abstract: A printed circuit board allowing the characteristic impedance and wavelength compaction ratio of microstrip lines thereof measured without disconnecting them from surrounding circuitry. A strip conductor has a land for measurement at one end thereof and chip lands connectable to a chip resistor at the other end.

Abstract: A cordless telephone apparatus having a connecting unit and a cordless telephone set. The apparatus processes a connecting unit call signal sent from the connecting unit and an originating call signal sent from the telephone set by giving priority to either one of the two signals. In a preferred embodiment which gives priority to originating call processing, the connecting unit stops sending a connecting unit call signal and, instead, sends an originating answer signal when an originating call signal with a coincident identification signal is detected during the course of transmission of the connecting unit call signal. The telephone set also sends an originating call signal when a carrier with a coincident identification signal is received. In an alternative embodiment which gives priority to connecting unit call processing, the connecting unit sends a connecting unit call signal on receiving an originating call signal with a coincident identification signal.