摘要:
A solid-state secondary lithium battery with excellent charge and discharge cycle characteristics, using a negative electrode active material which shows discontinuous change of potential caused by the lithium ion insertion and extraction reactions, wherein the amount of the lithium ion inserted, until discontinuous change of potential of the negative elctrode takes place, is equal to or smaller than the maximum amount of extraction of lithium ions within the range where lithium ions are inserted and extracted into or from the lithium transition metal oxide reversibly, and a battery assembly using these batteries.
摘要:
A method for producing an electrochemically advantageous lithium ion-conductive solid electrolyte with high ionic conductivity, low electronic conduction and electrochemical stability is disclosed. The method comprises the steps of synthesizing lithium sulfide by reacting lithium hydroxide with a gaseous sulfur source at a temperature of not less than 130°C and not more than 445°C, thermally melting plural compounds containing at least silicon sulfide and the synthesized lithium sulfide, and cooling the molten mixture. The silicon sulfide is synthesized by the steps of adding a silicon powder to molten sulfur while stirring to disperse the silicon powder in the molten sulfur and heating the silicon powder-dispersed sulfur in a reaction chamber under reduced pressure.
摘要:
A flexible battery (10) has at least one cell group (12) comprising four unit cells (13) of the solid-electrolyte type formed on a flexible substrate (11). The cell group (12) has a rectangular shape, and is divided into the four unit cells by strip-shaped portions (14a,14b) which are arranged along two diagonal lines of the rectangle and reduce the possibility of the battery being damaged by bending or twisting.
摘要:
A nonaqueous electrolyte battery having excellent preservability may be obtained. The battery includes a positive electrode, a negative electrode, and nonaqueous electrolytic solution containing organic solvent and electrolytic salt dissolved in the organic solvent. Further, the battery includes a compound containing boron and silicon. Preferably, the nonaqueous electrolytic solution comprises organic solvent, electrolytic salt dissolved in the organic solvent, and a compound containing boron and silicon, which is added into the organic solvent.
摘要:
A battery excellent in high temperature storage characteristic is presented. It comprises a positive electrode having a positive electrode active material containing an transition metal complex oxide containing lithium, a negative electrode containing a negative electrode material capable of storing and releasing a lithium ion, and an electrolytic solution containing a nonaqueous solvent, an electrolyte, and an organic compound expressed in formula 1. where R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 have individually at least one of H and a group containing a vinyl group, and the number of H substituent is four or less.
摘要:
A method for producing an electrochemically advantageous lithium ion-conductive solid electrolyte with high ionic conductivity, low electronic conduction and electrochemical stability is disclosed. The method comprises the steps of synthesizing lithium sulfide by reacting lithium hydroxide with a gaseous sulfur source at a temperature of not less than 130°C and not more than 445°C, thermally melting plural compounds containing at least silicon sulfide and the synthesized lithium sulfide, and cooling the molten mixture. The silicon sulfide is synthesized by the steps of adding a silicon powder to molten sulfur while stirring to disperse the silicon powder in the molten sulfur and heating the silicon powder-dispersed sulfur in a reaction chamber under reduced pressure.
摘要:
A lithium ion conductive inorganic solid electrolyte is used as an electrolyte in a lithium secondary battery which uses a transition metal chalcogenide or a lithium· transition metal chalcogenide as an active material for negative electrode. There is provided a lithium secondary battery improved in reversibility and in charge and discharge cycle characteristics as compared with lithium secondary batteries which use a liquid electrolyte or a molten salt electrolyte as the electrolyte.