摘要:
An antistatic composition comprising (a) at least one polymeric salt consisting of (i) at least one polyoxyalkylene ammonium cation, and (ii) a fluorinated anion. The composition exhibits good antistatic characteristics.
摘要:
An electrolyte membrane is formed by an acidic polymer and a low-volatility acid that is fluorinated, substantially free of basic groups, and is either oligomeric or non-polymeric.
摘要:
Lithium-ion electrochemical cells are provided that include a positive electrode that includes a lithium metal oxide or a lithium metal phosphate, a negative electrode capable of intercalating or alloying with lithium, and an electrolyte that includes an additive. The additive includes a multifunctional anion that has the formula, X—SO2—Rf′—SO2—Y, wherein X and Y are, independently, either O— or RfSO2N—, Rf is a straight or branched fluoroalkyl moiety having from 1 to 6 carbon atoms, and can, optionally, contain one or more in-chain heteroatoms, wherein Rf′ is a straight or branched chain or cyclic fluoroalkylene having from 1 to 10 carbon atoms and can, optionally, contain one or more in-chain heteroatoms, and wherein both Rf and Rf′ have a maximum of 20% non-fluorine substituents. The provided additives can improve the performance, hydrolytic stability, and thermal stability of the provided electrochemical cells.
摘要:
An electrolyte membrane is formed by an acidic polymer and a low-volatility acid that is fluorinated, substantially free of basic groups, and is either oligomeric or non-polymeric.
摘要:
Lithium-ion electrochemical cells are provided that include a positive electrode that includes a lithium metal oxide or a lithium metal phosphate, a negative electrode capable of intercalating or alloying with lithium, and an electrolyte that includes an additive. The additive includes a multifunctional anion that has the formula, X—SO2—Rf—SO2—Y, wherein X and Y are, independently, either O— or RfSO2N—, Rf is a straight or branched fluoroalkyl moiety having from 1 to 6 carbon atoms, and can, optionally, contain one or more in-chain heteroatoms, wherein Rf is a straight or branched chain or cyclic fluoroalkylene having from 1 to 10 carbon atoms and can, optionally, contain one or more in-chain heteroatoms, and wherein both Rf and Rf have a maximum of 20% non-fluorine substituents. The provided additives can improve the performance, hydrolytic stability, and thermal stability of the provided electrochemical cells.
摘要:
Overcharge protection is provided for rechargeable electrochemical lithium-ion cells. The electrolyte in the provided cells contains a cyclable redox shuttle molecule that can operate in cells with high voltage cathode materials.
摘要:
A lithium ion battery pack charging system comprises a lithium ion battery pack having positive and negative terminals and comprising a plurality of lithium ion cells connected in series and in electrical communication with the positive and negative terminals. Each of the plurality of lithium ion cells comprises an anode, a cathode, and electrolyte composition comprising a redox shuttle and a lithium salt at least partially dissolved in solvent. A charger in electrical communication with the positive and negative terminals is capable of charging the lithium ion battery pack at a first charge rate and a second lesser charge rate. The system further comprises a charger controller capable of monitoring input data and switching the charger from the first rate to the second changes based on the input data. A device comprising the lithium ion battery pack charging system is also disclosed.
摘要:
Disclosed are electrochemical cells that include electrodes comprising an electrolyte comprising a vinylene carbonate or a halogenated ethylene carbonate, composite electrodes, and a binder.
摘要:
Electrochemical cells are disclosed that include electrodes comprising a composite that includes an active material, graphite and a binder. The amount of graphite in the composite is greater than about 20 volume percent of the total volume of the active material and graphite in the composite. The porosity of the composite is less than about 20%. The cells also comprise an electrolyte that includes a vinylene carbonate derivative or a halogenated ethylene carbonate derivative.
摘要:
The present invention is an electrolyte membrane comprising an acid and a basic polymer, where the acid is a low-volatile acid that is fluorinated and is either oligomeric or non-polymeric, and where the basic polymer is protonated by the acid and is stable to hydrolysis.