摘要:
An anaerobic aluminum-water electrochemical cell is provided. The electrochemical cell includes: a plurality of electrode stacks, each electrode stack including an aluminum or aluminum alloy anode, and at least one cathode configured to be electrically coupled to the anode; one or more physical separators between each electrode stack adjacent to the cathode; a housing configured to hold the electrode stacks, an electrolyte, and the physical separators; a water injection port, in the housing, configured to introduce water into the housing, and an amount of hydroxide base sufficient to form an electrolyte having a hydroxide base concentration of at least 0.5% to at most 13% of the saturation concentration when water is introduced between the anode and the least one cathode. The aluminum or aluminum alloy of the anode is substantially free of titanium and boron.
摘要:
An electrolyte for a lithium air battery and lithium air battery including the electrolyte are provided. The electrolyte includes a compound represented by Formula 1 and a lithium salt:
摘要:
The present invention is directed to the fabrication of thin aluminum anode batteries using a highly reproducible process that enables high volume manufacturing of the galvanic cells. A method of fabricating a thin aluminum anode galvanic cell is provided, the method including, depositing a layer of catalytic metal on a surface of a first substrate, depositing and patterning a benzocyclobutene layer to form a reservoir having four sidewalls of benzocyclobutene on the surface of the catalytic layer, depositing a layer of aluminum on a surface of a second substrate and bonding the first substrate to the second substrate to form a galvanic cell bounded by the catalytic metal layer and the aluminum layer and separated by the reservoir walls of benzocyclobutene, the second substrate positioned in overlying relation to contact the four sidewalls of the reservoir with the aluminum layer facing the catalytic layer.
摘要:
A battery cell is described that has an anode made of an alkali metal or alkali metal alloy, an alkali metal conductive membrane, and a cathode compartment that houses a hydrogen evolving cathode and a catholyte. The catholyte has dissolved salt comprising cations of the alkali metal. The battery also includes a zone where hydrogen may vent from the catholyte and a zone where water may transport into the catholyte. The zone where water may transport into the catholyte restricts the transport of ions. The battery may be operated (1) in freshwater where there is low ion-conductivity and (2) in seawater where there is a quantity of cations (such as sodium ions) that are incompatible with the alkali metal conductive membrane. The battery is designed such that the alkali metal conductive membrane is protected from cations that operate to foul the alkali metal conductive membrane.
摘要:
The present invention is directed to the fabrication of thin aluminum anode batteries using a highly reproducible process that enables high volume manufacturing of the galvanic cells. A method of fabricating a thin aluminum anode galvanic cell is provided, the method comprising, forming a recess in the silicon wafer, the recess having no more than three sidewalls, depositing a catalytic metal layer on a bottom surface of the recess, positioning a double-side sticky tape layer having a bottom side positioned to contact the no more than three sidewalls of the recess and positioning an aluminum foil layer to contact a top side of the double-side sticky tape layer and in overlying relation to the recess, thereby forming the galvanic cell.
摘要:
Disclosed herein are embodiments of lithium/air batteries and methods of making and using the same. Certain embodiments are pouch-cell batteries encased within an oxygen-permeable membrane packaging material that is less than 2% of the total battery weight. Some embodiments include a hybrid air electrode comprising carbon and an ion insertion material, wherein the mass ratio of ion insertion material to carbon is 0.2 to 0.8. The air electrode may include hydrophobic, porous fibers. In particular embodiments, the air electrode is soaked with an electrolyte comprising one or more solvents including dimethyl ether, and the dimethyl ether subsequently is evacuated from the soaked electrode. In other embodiments, the electrolyte comprises 10-20% crown ether by weight.
摘要:
The present invention provides a battery or supercapacitor current collector which is prelithiated. The prelithiated current collector comprises: (a) an electrically conductive substrate having two opposed primary surfaces, and (b) a mixture layer of carbon (and/or other stabilizing element, such as B, Al, Ga, In, C, Si, Ge, Sn, Pb, As, Sb, Bi, Te, or a combination thereof) and lithium or lithium alloy coated on at least one of the primary surfaces, wherein lithium element is present in an amount of 1% to 99% by weight of the mixture layer. This current collector serves as an effective and safe lithium source for a wide variety of electrochemical energy storage cells, including the rechargeable lithium cell (e.g. lithium-metal, lithium-ion, lithium-sulfur, lithium-air, lithium-graphene, lithium-carbon, and lithium-carbon nanotube cell) and the lithium ion based supercapacitor cell (e.g, symmetric ultracapacitor, asymmetric ultracapacitor, hybrid supercapacitor-battery, or lithium-ion capacitor).
摘要:
Ionically conducting, redox active additive composite electrolytes are disclosed. The electrolytes include an ionically conductive component and a redox active additive. The ionically conductive component may be an ionically conductive material such as an ionically conductive polymer, ionically conducting glass-ceramic, ionically conductive ceramic, and mixtures thereof. Electrical energy storage devices that employ the ionically conducting, redox active additive composite electrolytes also are disclosed
摘要:
Active metal fuel cells are provided. An active metal fuel cell has a renewable active metal (e.g., lithium) anode and a cathode structure that includes an electronically conductive component (e.g., a porous metal or alloy), an ionically conductive component (e.g., an electrolyte), and a fluid oxidant (e.g., air, water or a peroxide or other aqueous solution). The pairing of an active metal anode with a cathode oxidant in a fuel cell is enabled by an ionically conductive protective membrane on the surface of the anode facing the cathode.
摘要:
Halogenated organic compounds that are inexpensive and are readily available have been used to present the examples of the invention. These chemicals, when in contact with water experience a reaction that releases oxy-halogenated acid. These compounds are weak acids and release hydrogen ions according to their ionization constant keeping a constant level of oxy-halogenated ion. These ions are capable of reacting with catalytic cathodes and can be coupled with anode materials to fabricate galvanic cells. Exemplary embodiments of the present invention include cells with flat and cylindrical form factors having a variety of anodes.