Abstract:
A spiral-wound electrode assembly an electrochemical cell with the spiral-wound electrode assembly, and a method of manufacturing an electrochemical cell with the spiral-wound electrode assembly are disclosed. The spiral-wound electrode assembly (400) has a first electrode (410) that has a first electrode active material, a leading edge and a trailing edge (440). The assembly has a second electrode (420) that includes a second electrode active material, a leading edge and a trailing edge (450). A separator (not shown) is located between the first electrode and the second electrode. The electrode assembly has an interfacial anode-to-cathode ratio of less than about 1.2. The first electrode, second electrode, and separator are wound so that the first electrode forms a layer at the outermost radius of the electrode assembly and so that the trailing edge of the second electrode extends past the trailing edge of the first electrode by a distance X.
Abstract:
A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS 2 ) and carbon particles. The electrolyte comprises a lithium salt preferably lithium iodide (LiI) dissolved in an organic solvent mixture. The solvent mixture preferably comprises dioxolane and dimethoxyethane. The electrolyte typically contains between about 100 and 2000 parts by weight water per million parts by weight (ppm) electrolyte therein. The anode may be lithium metal or preferably is a lithium alloy. A cathode slurry is prepared comprising iron disulfide powder, carbon, binder, and a liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.
Abstract:
A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS 2 ) or a mixture of iron disulfide (FeS 2 ) and iron sulfide (FeS) and conductive carbon particles. A cathode slurry is prepared comprising the FeS 2 or FeS 2 plus FeS powder, conductive carbon, binder, and a solvent. The binder is preferably a styrene-ethylene/butylene-styrene (SEBS) block copolymer. There is an advantage discovered in utilizing a hydronaphthalene solvent to form the cathode slurry. The preferred solvent is 1,2,3,4-tetrahydronaphthalene or decahydronaphthalene and mixtures thereof. The slurry mixture is coated onto a conductive substrate and the solvent evaporated leaving a dry cathode coating on the substrate. Higher drying temperature may be used resulting in a dry cathode coating which resists cracking. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.
Abstract:
A primary lithium battery can include a current collector that includes aluminum, a cap that includes aluminum, or both. The aluminum battery components can have high mechanical strength and low electrical resistance.
Abstract:
A method for treating a cathode electrode assembly. The method includes providing an electrode including iron disulfide and contacting the electrode with water to remove impurities from the electrode. The electrode may then be dried under various conditions. The moisture content of the electrode after drying may be less than about 600ppm.
Abstract:
A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS2) with calcium hydroxide Ca(OH)2 and lithium carbonate Li2CO3 additive mixed therein. The electrolyte may typically comprise lithium bistrifluoromethylsulfonyl imide, Li(CF3SO2)2N (LiTFSI) salt dissolved in a solvent mixture comprising 1,3-dioxolane and sulfolane. The electrolyte typically contains between about 100 and 2000 parts by weight water per million parts by weight (ppm) electrolyte therein. A cathode slurry is prepared comprising iron disulfide powder with Ca(OH)2 and Li2CO3 mixed therein, carbon, binder, and a liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.
Abstract translation:具有包含锂或锂合金的阳极和包含二氧化硫(FeS 2)与氢氧化钙Ca(OH)2和混合有碳酸锂Li 2 CO 3添加剂的阴极的初级电池。 电解质通常可以包含溶解在包含1,3-二氧戊环和环丁砜的溶剂混合物中的双三氟甲基磺酰亚胺锂,Li(CF 3 SO 2)2 N(LiTFSI)盐。 电解液通常含有每百万重量份(ppm)电解质中约100至2000重量份的水。 制备包含混合有Ca(OH)2和Li 2 CO 3的二硫化铁粉末,碳,粘合剂和液体溶剂的阴极浆料。 将混合物涂覆到导电基材上,并蒸发溶剂,在基材上留下干燥的阴极涂层。 阳极和阴极可以用分离器螺旋卷绕并插入电池壳体中,然后加入电解质。
Abstract:
A primary cell having an anode comprising lithium and a cathode comprising iron disulfide (FeS2) and carbon particles. The electrolyte comprises a lithium salt dissolved in a nonaqueous solvent mixture comprising a cyclic carbonate which contains an additive, iodine or bromine, suppressing voltage delay. A cathode slurry is prepared comprising iron disulfide powder, carbon, binder, and liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.
Abstract:
A zinc/air depolarized cell wherein the anode comprises zinc particles, aqueous alkaline electrolyte, and pyrophosphate based (P 2 O 7 ) 4 - additive. The cell may be in the form of a button cell. The addition of a pyrophosphate containing additive to the zinc anode improves the cell's service life regardless of whether the zinc is amalgamated with mercury or contains zero added mercury. The pyrophosphate based on (P 2 O 7 ) content preferably comprises between about 0.001 and 2 percent by weight of the anode.
Abstract translation:锌/空气去极化的电池,其中阳极包含锌颗粒,含水碱性电解质和基于焦磷酸盐(P 2 O 7)的 > 4 - 添加剂。 该单元可以是按钮单元格的形式。 向锌阳极添加含焦磷酸盐的添加剂可提高电池的使用寿命,而不管锌与汞是汞齐还是不含汞。 基于(P 2 O 7)含量的焦磷酸盐优选占阳极重量的约0.001至2%。 p>
Abstract:
Batteries and related compositions and methods are disclosed. In some embodiments, a method of making a battery can include heating at least one cathode including a cathode material in an atmosphere including oxygen, heating the cathode in a vacuum, adding the cathode into a housing, adding a separator into the housing, and adding an anode into the housing.
Abstract:
Electrochemical cells are disclosed. In some embodiments, an electrochemical cell includes a cathode, an anode, and an electrolyte having a first lithium salt and LiBF4.