摘要:
An electric double layer capacitor having an electrolyte solution impregnated to an element including a positive electrode and a negative electrode facing each other with a separator interposed therebetween, wherein an electrode containing a carbon material having a specific surface area of at least 500 m.sup.2 /g is used as the positive electrode and/or the negative electrode, and the separator is made of a glass fiber sheet containing from 2 to 60 wt % of glass fibers having fiber diameters of at most 1 .mu.m.
摘要:
An electric double layer capacitor used as a unit capacitor for forming an assembled cell type power source device by connecting a plurality of capacitor elements in series, wherein each of the capacitor elements is formed by impregnating an electrolyte in at least one pair of polarization electrode sheets between which a separator is inserted, wherein a protective circuit in which a Zener diode each having an operation resistance of 10-150 .OMEGA. at the average operation voltage of the electric double layer capacitor are connected in parallel to each of the electric double layer capacitors.
摘要:
An electric double layer capacitor is provided that includes a positive electrode having a currect collector combined with a polarizable electrode material composed mainly of activated carbon, a negative electrode having a current collector of porous metal incapable of forming an alloy with lithium, combined with a carbonaceous material having lithium ions occluded by a chemical method or an electrochemical method to a carbon material capable of occluding and releasing a lithium ions, and a nonaqueous electrolyte containing a lithium salt. The negative electrode is supported on a current collector of porous metal having a thickness of 0.1 to 1 mm and a porosity of 5 to 80%.
摘要:
An organic electrolyte cell comprising an organic electrolyte and an anode and/or a cathode of a carbonaceous material of a heat-treated material of an aromatic condensation polymer having a specific surface area of at least 1,500 m.sup.2 /g measured by BET method, wherein a solvent in the electrolyte is a mixed solvent containing a chain-like carbonate of the formula R.sup.1 OC(.dbd.O)OR.sup.2 (wherein R.sup.1 and R.sup.2 are monovalent organic groups which may be the same or different) and sulfolane or its derivative.
摘要:
A solution of a fluorinated polymer having groups having the formula--COOMwherein M represents an alkali metal atom or a metal atom in group II a or II b of the periodic table or ammonium group or an amine group in a highly polar organic solvent.
摘要:
An electrolysis of an aqueous solution of an alkali metal chloride is carried out to produce an alkali metal hydroxide having a concentration of 30 wt. % or more and chlorine by using a modified cation exchange membrane of a fluorinated polymer having carboxylic acid type ion exchange groups, which has an ion exchange capacity of 1.0 to 2.2 meq/g.dry polymer and at least one of whose surface layer has lower ion exchange capacity which is from 45 to 95% of that of the main part.
摘要:
An electrolysis of an aqueous solution of an alkali metal chloride is carried out to produce an alkali metal hydroxide in relatively low concentration lower than 30 wt.% and chlorine by using a modified cation exchange membrane of a fluorinated polymer having carboxylic acid type ion exchange groups, which has an ion exchange capacity of 1.1 to 2.0 meq/g.dry polymer and at least one of whose surface layer has lower ion exchange capacity which is from 45 to 95% of that of the main part.
摘要:
An electrolysis of an aqueous solution of sodium chloride is carried out by employing a fluorinated cation exchange membrane having an ion-exchange capacity of 0.8 to 2.0 meq/g dry polymer and having carboxylic acid groups as functional groups and maintaining a concentration of an aqueous solution of sodium hydroxide in a cathode compartment in a range of 20 to 45 wt. % and maintaining a calcium concentration in the aqueous solution of sodium chloride to lower than 0.08 mg/liter.The purification of the aqueous solution of sodium chloride to reduce the calcium concentration is carried out in a system comprising the first and second chelate ion-exchange towers which are connected through a detector for detecting impurities in the aqueous solution.
摘要:
An unsaturated aldehyde having three to four carbon atoms is prepared by reacting the corresponding olefin with molecular oxygen in the vapor phase at a temperature of from 350.degree. to 520.degree. C in the presence of a metal oxide catalyst comprising the metallic components: (a) molybdenum; (b) at least one metal selected from the group consisting of niobium and tantalum; (c) tellurium; and (d) at least one metal selected from the group consisting of alkali metals, copper, arsenic, antimony, iron and nickel.
摘要:
To provide a cathode active material for a lithium secondary battery, which is low in gas generation and has high safety and excellent durability for charge and discharge cycles even at a high charge voltage.A process for producing a lithium-containing composite oxide represented by the formula LipLqNxMyOzFa (wherein L is at least one element selected from the group of B and P, N is at least one element selected from the group consisting of Co, Mn and Ni, M is at least one element selected from the group consisting of Al, alkaline earth metal elements and transition metal elements other than N, 0.9≦p≦1.1, 1.0≦q
摘要翻译:为了提供即使在高充电电压下,气体产生低,并具有高安全性和优异的充放电循环耐久性的锂二次电池用正极活性物质。 一种由式LiLqNxMyOzFa(其中L是选自B和P中的至少一种元素,N是选自Co,Mn和Ni中的至少一种元素)的由式LiLqNxMyOzFa表示的含锂复合氧化物的方法, M是选自Al,碱土金属元素和除N之外的过渡金属元素中的至少一种元素,0.9&nlE; p&nlE; 1.1,1.0&amp; nlE; q <0.03,0.97&amp; nlE; x <1.00,0和nlE; y& ;其中含有N元素,如果需要的话,含有M元素和氟的含锂复合氧化物粉末是预先形成的,其中,0.03,1.9和nlE; z和nlE; 2.1,q + x + y = 1和0& 准备 将含锂复合氧化物粉末与含有L元素源的水溶液混合; 从所得混合物中除去水性介质,然后在含氧气氛中在300〜1050℃下烧成。