摘要:
The present invention provides a nonaqueous electrolyte mainly comprising a nonaqueous solvent and an electrolyte dissolved therein, wherein the nonaqueous electrolyte comprises at least one compound selected from the group consisting of saturated chain hydrocarbons, saturated cyclic hydrocarbons, aromatic compounds having a halogen atom, and ethers having a fluorine atom, and further comprises a monofluorophosphate and/or a difluorophosphate.
摘要:
An object is to provide a nonaqueous electrolyte and a nonaqueous-electrolyte secondary battery which have excellent discharge load characteristics and are excellent in high-temperature storability, cycle characteristics, high capacity, continuous-charge characteristics, storability, gas evolution inhibition during continuous charge, high-current-density charge/discharge characteristics, discharge load characteristics, etc. The object has been accomplished with a nonaqueous electrolyte which comprises: a monofluorophosphate and/or a difluorophosphate; and further a compound having a specific chemical structure or specific properties.
摘要:
A nonaqueous electrolytic solution including an electrolyte, a nonaqueous solvent, and a compound represented by Formula (1) below.
(in Formula (1), X 1 and X 2 each independently represent C, S, or P; n 1 and n 2 each independently represent 1 when X 1 and X 2 represent C or P and 2 when X 1 and X 2 represent S; n 1 represents 1 or 2; n 2 represents 1 or 2; Y 1 and Y 2 each independently represent a hydrocarbon group that may have a substituent or an -OW group (where W represents a hydrocarbon group that may have a substituent); m 1 represents 1 or 2, and m 2 represents 1 or 2; and Z represents a hydrocarbon group that may have a substituent, an -SiV 3 group (where V represents a hydrocarbon group that may have a substituent), an organic onium, or a metal).
摘要:
A difluorophosphate salt, which is expensive and not readily available, can be produced with a high purity readily and efficiently from inexpensive and readily available materials. A nonaqueous electrolyte secondary battery that exhibits low-temperature discharge and heavy-current discharge characteristics and high-temperature preservation and cycle characteristics without impairing the battery safety. A hexafluorophosphate salt is reacted with a compound having a bond represented by the following formula (1) in the molecule:
Si-O-Si (1)
A nonaqueous electrolyte used for nonaqueous electrolyte secondary batteries including a negative electrode and a positive electrode that can occlude and discharge ions, and a nonaqueous electrolyte is prepared from a mixture obtained by mixing at least one nonaqueous solvent, a hexafluorophosphate salt and a compound having a bond represented by the following formula (1), and removing low-boiling compounds newly formed in the system, the low-boiling compounds having a lower boiling point than that of the compound having the bond represented by the formula (1):
摘要:
A task of the present invention is to provide a non-aqueous electrolyte secondary battery which exhibits small initial irreversible capacity and high initial efficiency as well as excellent high-temperature cycle characteristics without sacrificing the yield of the battery. The non-aqueous electrolytic solution of the present invention is a non-aqueous electrolytic solution for use in a non-aqueous electrolyte secondary battery which comprises a positive electrode capable of having occluded therein and releasing metal ions, a negative electrode capable of having occluded therein and releasing metal ions, and a non-aqueous electrolytic solution comprising a non-aqueous solvent and an electrolyte dissolved in the non-aqueous solvent, wherein the non-aqueous electrolytic solution contains a compound represented by the general formula (1) in an amount of 0.01 to 4.5% by mass, based on the mass of the non-aqueous electrolytic solution:
wherein, in the general formula (1), n represents an integer of 1 to 4, and R 1 to R 3 represent predetermined groups.
摘要:
A subject is to provide a nonaqueous electrolyte excellent in cycle performances such as capacity retention after cycling, output after cycling, discharge capacity after cycling, and cycle discharge capacity ratio, output characteristics, high-temperature storability, low-temperature discharge characteristics, heavy-current discharge characteristics, high-temperature storability, safety, high capacity, high output, high-current-density cycle performances, compatibility of these performances, etc. Another subject is to provide a nonaqueous-electrolyte secondary battery employing the nonaqueous electrolyte. The subjects have been accomplished with a nonaqueous electrolyte which contains a monofluorophosphate and/or a difluorophosphate and further contains a compound having a specific chemical structure or specific properties.