摘要:
A lithium-air battery includes a lithium anode; an air cathode; and a separator between the lithium anode and an air cathode the separator including a cross-linked polysiloxane.
摘要:
A composite material has general Formula (1-x)J-(x)Q wherein: J is a metal carbon alloy of formula SnzSiz′MetwMet′w′Ct; Q is a metal oxide of formula AγMαM′α′Oβ; A is Li, Na, or K; M, M′, Met, and Met′ are individually Ge, Mo, Al, Ga, As, Sb, Te, Ti, Ta, Zr, Ca, Mg, Sr, Ba, Li, Na, K, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Nb, Rt, Ru or Cd; 0
摘要:
The electrolyte includes one or more salts and a silane. The silane has a silicon linked to one or more first substituents that each include a poly(alkylene oxide) moiety or a cyclic carbonate moiety. The silane can be linked to four of the first substituents. Alternately, the silane can be linked to the one or more first substituents and one or more second substituents that each exclude both a poly(alkylene oxide) moiety and a cyclic carbonate moiety.
摘要:
Compounds may have general Formula I, II, or III: where R1, R2, R3, and R4 are independently H, F, Cl, Br, CN, NO2, a alkyl group, a haloalkyl group, a phosphate group, a polyether group; or R1 and R2, or R3 and R4, or R2 and R3 (in the case of Formula II) may join together to form a fused ring on the benzene ring; and X and Z are independently a group of Formula A: where R5 and R6 and R7 are independently H, F, Cl, Br, CN, NO2, a alkyl group, a haloalkyl group, a phosphate group, or a polyether group; R7 is H, F, Cl, Br, CN, NO2, a alkyl group, a haloalkyl group, a phosphate group, or a polyether group; n is an integer from 1 to 8; and m is an integer from 1 to 13. Such compounds may be used as redox shuttles in electrolytes for use in electrochemical cells, batteries and electronic devices.
摘要:
A process includes reacting a titanium compound with an oxalate compound in an acidic medium to form a titanium oxalate complex, where the titanium oxalate complex includes primary and secondary particles. The primary titanium oxalate complex particles may be from about 1 nm to about 200 nm; and the secondary titanium oxalate complex particles may be from about 0.5 μm to 50 μm. The titanium oxalate complex may be sintered to prepare a titania-based compound. The titania-based compounds may be used to fabricate electrodes for electrochemical cells.
摘要:
Processes are provided for making dense, spherical mixed-metal carbonate or phosphate precursors that are particularly well suited for the production of active materials for electrochemical devices such as lithium ion secondary batteries. Exemplified methods include precipitating dense, spherical particles of metal carbonates or metal phosphates from a combined aqueous solution using a precipitating agent such as ammonium hydrogen carbonate, sodium hydrogen carbonate, or a mixture that includes sodium hydrogen carbonate. Other exemplified methods include precipitating dense, spherical particles of metal phosphates using a precipitating agent such as ammonium hydrogen phosphate, ammonium dihydrogen phosphate, sodium phosphate, sodium hydrogen phosphate, sodium dihydrogen phosphate, or a mixture of any two or more thereof. Further provided are compositions of and methods of making dense, spherical metal oxides and metal phosphates using the dense, spherical metal precursors. Still further provided are electrodes and batteries using the same.
摘要:
Primary and secondary Li-ion and lithium-metal based electrochemical cell systems. Suppression of gas generation is achieved in the cell through the addition of an additive or additives to the electrolyte system of the respective cell, or to the cell whether it be a liquid, a solid- or plastized polymer electrolyte system. The gas suppression additives are preferably based on unsaturated hydrocarbons.
摘要:
A material comprising a lithium titanate comprising a plurality of primary particles and secondary particles, wherein the average primary particle size is about 1 nm to about 500 nm and the average secondary particle size is about 1 μm to about 4 μm. In some embodiments the lithium titanate is carbon-coated. Also provided are methods of preparing lithium titanates, and devices using such materials.
摘要:
The electrochemical device has an electrolyte that includes one or more tetrasiloxanes. The tetrasiloxanes have a backbone with two central silicons and two terminal silicons. A first one of the silicons is linked to a side chain that includes a poly(alkylene oxide) moiety. A second one of the silicons is linked to a side chain that includes a poly(alkylene oxide) moiety or to a side chain that includes a cyclic carbonate moiety. When each of the central silicons is linked to a side chain that includes a poly(alkylene oxide) moiety, each of the central silicons is directly linked to the poly(alkylene oxide) moiety.