Electrolytes and electrolyte additives for energy storage devices comprising fluorinated cyclic compounds.

Electrolytes and electrolyte additives for energy storage devices comprising fluorinated cyclic compounds.

Provided are: a non-aqueous electrolyte solution that can improve the charged storage characteristics of a non-aqueous electrolyte battery under a high-temperature environment while containing FSO.sub.3Li; and a non-aqueous electrolyte battery having excellent charged storage characteristics under a high-temperature environment. The non-aqueous electrolyte solution contains FSO.sub.3Li and a specific amount of ions of a specific metal element.

A power storage device includes a power storage module, a pair of current collector plates configured to be stacked to interpose the power storage module in a first direction that is vertical, a pair of insulating plates configured to be stacked to interpose the power storage module and the pair of current collector plates in the first direction; and a pair of restraint plates configured to be stacked to interpose the power storage module, the pair of current collector plates, and the pair of insulating plates in the first direction. The power storage module is configured to include an accommodation space that accommodates an electrolytic solution together with a power generation element. A pressure adjustment valve communicating with the accommodation space is provided on a side surface of the power storage module. The insulating plate arranged on a lower side in the first direction with respect to the power storage module is configured to include a main body portion arranged between the current collector plate and the restraint plate, and a liquid receiving portion that is provided on an outer edge portion of the main body portion, is arranged at least at a position corresponding to the pressure adjustment valve when viewed from the first direction, and stores the electrolytic solution discharged from the power storage module. The main body portion and the liquid receiving portion are integrally formed.

A power storage device includes a power storage module, a pair of current collector plates configured to be stacked to interpose the power storage module in a first direction that is vertical, a pair of insulating plates configured to be stacked to interpose the power storage module and the pair of current collector plates in the first direction; and a pair of restraint plates configured to be stacked to interpose the power storage module, the pair of current collector plates, and the pair of insulating plates in the first direction. The power storage module is configured to include an accommodation space that accommodates an electrolytic solution together with a power generation element. A pressure adjustment valve communicating with the accommodation space is provided on a side surface of the power storage module. The insulating plate arranged on a lower side in the first direction with respect to the power storage module is configured to include a main body portion arranged between the current collector plate and the restraint plate, and a liquid receiving portion that is provided on an outer edge portion of the main body portion, is arranged at least at a position corresponding to the pressure adjustment valve when viewed from the first direction, and stores the electrolytic solution discharged from the power storage module. The main body portion and the liquid receiving portion are integrally formed.

An energy storage apparatus suitable for mounting on a printed circuit board using a solder reflow process is disclosed. In some embodiments, the apparatus includes: a sealed housing body (e.g., a lower body with a lid attached thereto) including a positive internal contact and a negative internal contact (e.g., metallic contact pads) disposed within the body and each respectively in electrical communication with a positive external contact and a negative external contact. Each of the external contacts provide electrical communication to the exterior of the body, and may be disposed on an external surface of the body. An electric double layer capacitor (EDLC) (also referred to herein as an “ultracapacitor” or “supercapacitor”) energy storage cell is disposed within a cavity in the body including a stack of alternating electrode layers and electrically insulating separator layers. An electrolyte is disposed within the cavity and wets the electrode layers. A positive lead electrically connects a first group of one or more of the electrode layers to the positive internal contact; and a negative lead electrically connects a second group of one or more of the electrode layers to the negative internal contact.

An electrochemical device including an anode having an anode current collector and a skeleton layer, the skeleton layer being disposed in an central region on the anode current collector, and a region, not covered by the skeleton layer, on the anode current collector being provided with an insulation layer; a cathode; and an electrolyte including about 1 wt % to about 40 wt % of a sulfone compound, about 1 wt % to about 40 wt % of a phosphorus compound and about 1 wt % to about 70 wt % of a fluoroether compound, based on the total weight of the electrolyte. The electrochemical device has superior cycle performance and safety performance.

A capacitor includes a first metal layer disposed on a wafer or substrate, a first polarized dielectric layer above the first metal layer and comprising a plurality of electrets formed by aligning molecular dipoles throughout a three-dimensional surface area of a polarizable dielectric material during polarization by applying a momentary electric field of positive or negative polarity, a second metal layer disposed on the first polarized dielectric layer to electrically isolate the first polarized dielectric layer, and a second polarized dielectric layer above the second metal layer, the second polarized dielectric layer comprising a plurality of electrets formed by aligning molecular dipoles throughout a three-dimensional surface area of a polarizable dielectric material during polarization by applying a second momentary electric field of opposing polarity. A plurality of alternating polarized dielectric layers and metal layers may be arranged in series to form a stack, with an internal passivation layer disposed between each stack.

A capacitor includes a first metal layer disposed on a wafer or substrate, a first polarized dielectric layer above the first metal layer and comprising a plurality of electrets formed by aligning molecular dipoles throughout a three-dimensional surface area of a polarizable dielectric material during polarization by applying a momentary electric field of positive or negative polarity, a second metal layer disposed on the first polarized dielectric layer to electrically isolate the first polarized dielectric layer, and a second polarized dielectric layer above the second metal layer, the second polarized dielectric layer comprising a plurality of electrets formed by aligning molecular dipoles throughout a three-dimensional surface area of a polarizable dielectric material during polarization by applying a second momentary electric field of opposing polarity. A plurality of alternating polarized dielectric layers and metal layers may be arranged in series to form a stack, with an internal passivation layer disposed between each stack.

The present invention provides a supercapacitor assembly which is characterised by comprising: a supercapacitor comprised of carbon-containing anode(s) and cathode(s), intermediate porous membrane(s) and an ionic liquid electrolyte; an electrical heater for heating the supercapacitor; and a thermostat for controlling the heater and maintaining the temperature of the ionic liquid at a temperature such that its viscosity is in the range 1 to 50 centipoise. In particular, there are provided supercapacitors which can operate at voltages greater than 3.5 v (for example, in the range 3.5 to 6 v) without significant long term redox degradation.