192 results about "Anodic protection" patented technology

Active metal electrochemical structure, in particular an active metal negative electrode (anode) protected with an ionically conductive protective architecture incorporating a glassy, ceramic or glass-ceramic solid electrolyte material based on lithium hafnium phosphate, and associated electrochemical devices and methods, provides advantages over conventional structures. The protective architecture prevents the active metal from deleterious reaction with the environment on the other (cathode) side of the architecture, which may include aqueous, air or organic liquid electrolytes and/or electrochemically active materials.

The present invention provides a battery cell, comprising: (a) an anode comprising an active metal or a metal ion storage material (e.g., an intercalation compound that accommodates lithium ion); (b) a cathode structure; and (c) an ionically conductive protective layer on a surface of the anode and interposed between the anode and the cathode structure. This protective layer comprises a porous membrane having pores therein and a soft matter phase disposed in at least one of the pores, wherein the soft matter phase comprises oxide particles dispersed in a non-aqueous alkali, alkaline, or transition metal salt solution. Most preferably, this battery cell is a lithium metal secondary cell that is essentially free from dendrite and exhibits a safer and more stable cycling behavior. Such a high-capacity rechargeable battery is particularly useful for powering portable electronic devices and electric vehicles.

Provided is a lithium secondary battery, comprising a cathode, an anode, and a porous separator or electrolyte, wherein the anode comprises: (a) an anode active layer containing a layer of lithium or lithium alloy, in a form of a foil, coating, or multiple particles aggregated together, as an anode active material; and (b) an anode-protecting layer of a conductive sulfonated elastomer composite, disposed between the anode active layer and the separator/electrolyte; wherein the composite has from 0.01% to 40% by weight of a conductive reinforcement material and from 0.01% to 40% by weight of an inorganic filler dispersed in a sulfonated elastomeric matrix material and the protecting layer has a thickness from 1 nm to 100 μm, a fully recoverable tensile strain from 2% to 500%, a lithium ion conductivity from 10⁻⁷ S/cm to 5×10⁻² S/cm, and an electrical conductivity from 10⁻⁷ S/cm to 100 S/cm.

An anode protector of a lithium-ion battery and a method for fabricating the same are provided. A passivation protector (110) is formed on a surface of an anode (102) in advance by film deposition, such as atomic layer deposition (ALD). The passivation protector (110) is composed of a metal oxide having three dimensional structures, such as columnar structures. Accordingly, the present invention is provided with effective protection of the anode electrode structure and maintenance of battery cycle life under high-temperature operation.

An anode protection device and method are provided. The method includes placing a sacrificial anode in proximity to the positive and negative contacts to shield or distort the field therebetween which provides preferential corrosion of the sacrificial anode, instead of the anode. The protection device is a sacrificial anode having various forms and placed in different configurations. In one form the sacrificial anode is a plate. In another form the sacrificial anode is a ring placed around either the positive contact or negative contact to provide a shield between the negative and positive contacts. In a further device embodiment, the sacrificial anodic plate can be welded to the aluminum case of a rechargeable battery of a behind-the-ear (BTE) hearing device.

The invention belongs to the technical field of application of polymer mortar and particularly relates to a preparation method of epoxy mortar for filling an ocean oil and gas pipeline. The epoxymortar consists of a component A, a component B and a component C, wherein the component A is prepared by defoaming after blending epoxy resin, a reactive diluent, a plasticizer, an accelerator and pigments according to the proper proportion and; the component B is a special underwater T31-3 type curing agent; the component C is aggregate formed by mixing cement with quartz sand according to a certain proportion. When the epoxymortar is used for construction, the component A is heated to 30-50DEG C and stirred to homogeneousphase, and then the component A and the component B are mixed according to certain proportion and uniformly stirred; the component C is subsequently added into the mixture for uniformly blending to obtain an epoxymortar mixture for filling the ocean oil and gas pipeline. The mortar mixture is simple in preparation process; the prepared mixture has the advantages of high curing speed and strong cohesiveness as well as excellent compress and shock resistance and seawater corrosion resistance. The mortar mixture can be used for filling and strengthening an anode protection anticorrosive structure of the ocean oil and gas pipelines.

The invention relates to a production method of an anode protection ring in the electrolytic aluminum production, which is used for producing an anode steel talon protection ring by taking the waste in the electrolytic aluminum production as main raw material and adding coal pitch and coal tar in the waste. The waste includes: residual anode waste, waste paste, waste carbon residue and waste cathode crushed material, different types of waste can produce different types of anode steel talon protection rings, including conventional type protection rings, waste paste protection rings, carbon residue type protection rings and waste cathode block protection rings, and the proportion of various raw materials for producing the anode steel talon protection rings is that: waste : coal pitch : coal tar is equal to 100 : 7-14 : 3-8. The method uses the waste in the electrolytic aluminum production as most raw materials, not only reduces the pollution of overhaul groove solid waste and other waste in the electrolytic aluminum production to the environment, but also effectively utilizes the waste and reduces the production cost of electrolytic aluminum. The plant use proves that the anode steel talon protection rings produced by the method can completely satisfy production requirements.

A method for protecting the inner surface of anticorrosion pipeline jointer by use of sacrificial anode features that the Al-Zn-Mg alloy ring used as the sacrificial anode is fixed to one or two ends of a steel pipe and then welded by existing welding technology.

Provided is a lithium secondary battery containing an anode, a cathode, a porous separator/electrolyte element disposed between the anode and the cathode, and a cathode-protecting layer bonded or adhered to the cathode, wherein the cathode-protecting layer comprises a lithium ion-conducting polymer matrix or binder and inorganic material particles that are dispersed in or chemically bonded by the polymer matrix or binder and wherein the cathode-protecting layer has a thickness from 10 nm to 100 μm and the polymer matrix or binder has a lithium-ion conductivity from 10⁻⁸ S/cm to 5×10⁻² S/cm. Additionally or alternatively, there can be a similarly configured anode-protecting layer adhered to the anode. Such an electrode-protecting layer prevents massive internal shorting from occurring even when the porous separator gets melted, contracted, or collapsed under extreme temperature conditions induced by, for instance, dendrite or nail penetration.

The cathodic protection of a reinforced concrete structure utilizes sacrificial anodes such as aluminum or zinc as well as alloys thereof. Each anode is embedded or substantially covered in a material consisting of a hydrophilic non-cementious open-cell foam. An activating agent such as one or more lithium salts is contained within the cells of the foam to maintain the anodes in an electrochemically active state. The activating agent may be immobilized in the cells using an aqueous gel such as agar. One or more metallic conductors electrically connect the anodes to the metal reinforcing members.

The invention provides a method of improving the anode stability and cycle-life of a lithium metal secondary battery. The method comprises implementing two anode-protecting layers between an anode active material layer and an electrolyte or electrolyte/separator assembly. These two layers comprise (a) a first anode-protecting layer having a thickness from 1 nm to 100 μm (preferably <1 μm and more preferably <100 nm) and comprising a lithium ion-conducting material having a lithium ion conductivity from 10⁻⁸ S/cm to 5×10⁻² S/cm; and (b) a second anode-protecting layer having a thickness from 1 nm to 100 μm and comprising an elastomer having a fully recoverable tensile elastic strain from 2% to 1,000% (preferably >10% more preferably >100%) and a lithium ion conductivity from 10⁻⁸ S/cm to 5×10⁻² S/cm.

The invention relates to a non-diaphragm electrochemical waste water treatment device which comprises an electrode reactor, wherein a waste water guide pipe, an anode, a feed cathode and a large metalparticle collecting device are arranged in the electrode reactor; a waste water inlet is arranged at the bottom of the electrode reactor, the upper side of the waste water inlet is longitudinally provided with the waste water guide pipe, and a space is reserved between the lower end of the waste water guide pipe and the waste water inlet; in addition, the upper end of the waste water guide pipe is provided with an anode protective baffle; the anode is arranged on the outer wall of the waste water guide pipe, and the feed cathode is arranged at the bottom of the electrode reactor; moreover, afeeding device is arranged on the electrode reactor; and the large metal particle collecting device is arranged below the anode protective baffle. Therefore, the non-diaphragm electrochemical waste water treatment device can effectively maintain particles in the electrode reactor to be fluidized and also prevent the metal particles from entering an anode reaction area. Under the condition of no need of a diaphragm, a cathode reaction area and an anode reaction rear are separated, thereby thoroughly solving various problems brought by using the diaphragm.

A fuel cell system is disclosed, which includes an anode recirculation loop including a fuel cell stack for generating power, a fuel supply device for providing a fuel to the anode recirculation loop, an air supply device for providing air to a cathode of the fuel cell stack, a voltage monitoring device for monitoring a voltage of the fuel cell stack, and an anode protection controller. The anode protection controller decreases a current drawn from the fuel cell stack by a predetermined amount whenever the voltage of the fuel cell stack drops below a predetermined voltage threshold and decreases a fuel flowrate provided to the anode recirculation loop based on the decreased current, so as to maintain a steam to carbon ratio in the anode recirculation loop above a predetermined steam to carbon ratio limit. A shutdown method for the fuel cell system are also disclosed.