摘要:
A secondary battery capable of decreasing progression temperature of a precipitation-dissolution reaction of aluminum is provided. A cathode 11 and an anode 12 are separated from each other by a separator 13. An electrolyte with which the separator 13 is impregnated contains an alkyl sulfone (R1—S(═O)2—R2: each of R1 and R2 represents an alkyl group) and a solvent (having a specific dielectric constant of 20 or less) together with an aluminum salt. A content of the solvent is equal to or larger than 30 mol % and is less than 88 mol %, and a mol ratio (a content of the aluminum salt/a content of the alkyl sulfone) is equal to or larger than 4/5 and is less than 7/3.
摘要:
A secondary battery capable of safely improving a battery performance is provided. An electrolyte with which a separator 13 is impregnated contains an alkyl sulfone and a low-polar solvent (a solvent having a relative permittivity of 20 or less) together with an aluminum salt. The alkyl sulfone facilitates the redox reaction of aluminum, and further reduces the reactivity of the electrolyte. Additionally, the low-polar solvent suppresses the block of the redox reaction of aluminum. In charge and discharge, it becomes easy to electrochemically efficiently precipitate and dissolve aluminum, and further to inhibit the corrosion of a metallic exterior package member or the like.
摘要:
A nonaqueous electrolytic solution containing magnesium ions which shows excellent electrochemical characteristics and which can be manufactured in a general manufacturing environment such as a dry room, and an electrochemical device using the same are provided. A Mg battery has a positive-electrode can 1, a positive-electrode pellet 2 made of a positive-electrode active material or the like, a positive electrode 11 composed of a metallic net supporting body 3, a negative-electrode cup 4, a negative electrode 12 made of a negative-electrode active material 5, and a separator 6 impregnated with an electrolytic solution 7 and disposed between the positive-electrode pellet and the negative-electrode active material. Metal Mg, an alkyl trifluoromethanesulfonate, a quaternary ammonium salt or/and a 1,3-alkylmethylimidazolium salt, more preferably, an aluminum halide are added to an ether system organic solvent and are then heated, and thereafter, more preferably, a trifluoroborane-ether complex salt is added thereto, thereby preparing the electrolytic solution. By adopting a structure that copper contacts the positive-electrode active material, the electrochemical device can be given a large discharge capacity.
摘要:
A secondary battery capable of safely improving a battery performance is provided. An electrolyte with which a separator 13 is impregnated contains an alkyl sulfone and a low-polar solvent (a solvent having a relative permittivity of 20 or less) together with an aluminum salt. The alkyl sulfone facilitates the redox reaction of aluminum, and further reduces the reactivity of the electrolyte. Additionally, the low-polar solvent suppresses the block of the redox reaction of aluminum. In charge and discharge, it becomes easy to electrochemically efficiently precipitate and dissolve aluminum, and further to inhibit the corrosion of a metallic exterior package member or the like.
摘要:
A nonaqueous electrolytic solution containing magnesium ions which shows excellent electrochemical characteristics and which can be manufactured in a general manufacturing environment such as a dry room, and an electrochemical device using the same are provided. A Mg battery has a positive-electrode can 1, a positive-electrode pellet 2 made of a positive-electrode active material or the like, a positive electrode 11 composed of a metallic net supporting body 3, a negative-electrode cup 4, a negative electrode 12 made of a negative-electrode active material 5, and a separator 6 impregnated with an electrolytic solution 7 and disposed between the positive-electrode pellet and the negative-electrode active material. Metal Mg, an alkyl trifluoromethanesulfonate, a quaternary ammonium salt or/and a 1,3-alkylmethylimidazolium salt, more preferably, an aluminum halide are added to an ether system organic solvent and are then heated, and thereafter, more preferably, a trifluoroborane-ether complex salt is added thereto, thereby preparing the electrolytic solution. By adopting a structure that copper contacts the positive-electrode active material, the electrochemical device can be given a large discharge capacity.
摘要:
The invention provides a high-capacity positive electrode active material capable of sufficiently exploiting the excellent characteristics of magnesium metal or the like as a negative electrode active material, such as high energy capacity; a method for producing the same; and an electrochemical device using the positive electrode active material. A positive electrode 11 includes a positive electrode can 1, a positive pole pellet 2 having a positive electrode active material and the like, and a metal mesh support 3. A negative electrode 12 includes a negative electrode cap 4 and a negative electrode active material 5 such as magnesium metal. The positive electrode pellet 2 and the negative electrode active material 5 are disposed so as to sandwich a separator 6, and an electrolyte 7 is injected into the separator 6. The positive electrode active material, which provides the feature of the invention, is synthesized by a step of reacting a permanganate, such as potassium permanganate, with hydrochloric acid preferably having a concentration of 3 to 4 mol/l to produce a precipitate, and a step of filtering the precipitate, thoroughly washing the filtered precipitate with water, and then subjecting the washed precipitate to heat treatment preferably at a temperature of 300 to 400° C. for not less than 2 hours, thereby giving a manganese oxide.
摘要:
The invention provides a high-capacity positive electrode active material capable of sufficiently exploiting the excellent characteristics of magnesium metal or the like as a negative electrode active material, such as high energy capacity; a method for producing the same; and an electrochemical device using the positive electrode active material. A positive electrode 11 includes a positive electrode can 1, a positive pole pellet 2 having a positive electrode active material and the like, and a metal mesh support 3. A negative electrode 12 includes a negative electrode cap 4 and a negative electrode active material 5 such as magnesium metal. The positive electrode pellet 2 and the negative electrode active material 5 are disposed so as to sandwich a separator 6, and an electrolyte 7 is injected into the separator 6. The positive electrode active material, which provides the feature of the invention, is synthesized by a step of reacting a permanganate, such as potassium permanganate, with hydrochloric acid preferably having a concentration of 3 to 4 mol/l to produce a precipitate, and a step of filtering the precipitate, thoroughly washing the filtered precipitate with water, and then subjecting the washed precipitate to heat treatment preferably at a temperature of 300 to 400° C. for not less than 2 hours, thereby giving a manganese oxide.
摘要:
A magnesium battery (10) is constituted of a negative electrode (1), a positive electrode (2) and an electrolyte (3). The negative electrode (1) is formed of metallic magnesium and can also be formed of an alloy. The positive electrode (2) is composed of a positive electrode active material, for example, a metal oxide, graphite fluoride ((CF)n) or the like, etc. The electrolytic solution (3) is, for example, a magnesium ion-containing nonaqueous electrolytic solution prepared by dissolving magnesium(II) chloride (MgCl2) and dimethylaluminum chloride ((CH3)2AlCl) in tetrahydrofuran (THF). In the case of dissolving and depositing magnesium by using this electrolytic solution, the following reaction proceeds in the normal direction or reverse direction. According to this, there are provided a magnesium ion-containing nonaqueous electrolytic solution having a high oxidation potential and capable of sufficiently bringing out excellent characteristics of metallic magnesium as a negative electrode active material and a method for manufacturing the same, and an electrochemical device with high performances using this electrolytic solution.
摘要:
A magnesium battery (10) is constituted of a negative electrode (1), a positive electrode (2) and an electrolyte (3). The negative electrode (1) is formed of metallic magnesium and can also be formed of an alloy. The positive electrode (2) is composed of a positive electrode active material, for example, a metal oxide, graphite fluoride ((CF)n) or the like, etc. The electrolytic solution (3) is, for example, a magnesium ion-containing nonaqueous electrolytic solution prepared by dissolving magnesium(II) chloride (MgCl2) and dimethylaluminum chloride ((CH3)2AlCl) in tetrahydrofuran (THF). In the case of dissolving and depositing magnesium by using this electrolytic solution, the following reaction proceeds in the normal direction or reverse direction. According to this, there are provided a magnesium ion-containing nonaqueous electrolytic solution having a high oxidation potential and capable of sufficiently bringing out excellent characteristics of metallic magnesium as a negative electrode active material and a method for manufacturing the same, and an electrochemical device with high performances using this electrolytic solution.
摘要:
A magnesium ion containing non-aqueous electrolyte in which magnesium ions and aluminum ions are dissolved in an organic etheric solvent, and which is formed by: adding metal magnesium, a halogenated hydrocarbon RX, an aluminum halide AlY3, and a quaternary ammonium salt R1R2R3R4N+Z− to an organic etheric solvent; and applying a heating treatment while stirring them (in the general formula RX representing the halogenated hydrocarbon, R is an alkyl group or an aryl group, X is chlorine, bromine, or iodine, in the general formula AlY3 representing the aluminum halide, Y is chlorine, bromine, or iodine, in the general formula R1R2R3R4N+Z− representing the quaternary ammonium salt, R1, R2, R3, and R4 represent each an alkyl group or an aryl group, and Z− represents chloride ion, bromide ion, iodide ion, acetate ion, perchlorate ion, tetrafluoro borate ion, hexafluoro phosphate ion, hexafluoro arsenate ion, perfluoroalkyl sulfonate ion, or perfluoroalkyl sulfonylimide ion.