32results about How to "Reduce self-discharge phenomenon" patented technology

The invention provides a kind of electrolytic solution, comprise electrolyte lithium salt, non-aqueous organic solvent and additive, described additive is made up of additive A and additive B; Said additive A is selected from the compound shown in formula (I) and formula ( One or two of the compounds shown in II); the additive B is a compound containing an oxalate group. The present application also provides a lithium ion battery. The electrolyte provided by the application can be matched with the high-nickel ternary positive electrode material, which can significantly improve the normal temperature cycle, high temperature cycle and high temperature storage performance of the lithium ion battery, and greatly reduce the gas production during the high temperature storage process.

A preparation method of gel polymer electrolyte disclosed in the invention includes dissolve polymer matrix in water, adding dispersion of halide ionic liquid and carbon nanotube, adding lithium sulfate solution, removing excess wat, and preparing gel polymer electrolyte with redox activity. The preparation method of the gel polymer electrolyte of the invention is simple, and the self-discharge phenomenon of the supercapacitor can be effectively reduced. The invention also discloses the application of the prepared gel polymer electrolyte in a supercapacitor, in particular an active electrolyteenhanced supercapacitor.

The invention provides a method for forming a lithium-ion battery, wherein the positive electrode active material in the lithium-ion battery is mainly composed of LiNi 0.7 mn 0.2 Ni 0.1 o 2 Composed, the electrolyte of the lithium-ion battery includes additives composed of vinylene carbonate VC and fluoroethylene carbonate FEC, wherein VC accounts for 0.5-1% of the total volume of the electrolyte, and FEC accounts for 0.5-1% of the total volume of the electrolyte 1.5-4%, and the volume ratio FEC / EC of FEC and VC is more than 2, wherein the formation method includes a staged formation process and a staged exhaust process, so as to form a stable SEI film and prevent the battery from Metal dissolution on the surface of the positive electrode during storage, and the occurrence of self-discharge.

The invention relates to a positive electrode for a lithium sulfur battery. The material of the positive electrode is a one or two or above two of a carbon-sulfur composite material, a sulfur-conductive polymer composite material and a sulfur-metal oxide composite material, and the content of sulfur in the positive electrode material is 10-95%; the positive electrode material also contains nano-gold or / and nano-silver particles; and a ratio of the total addition of the nano-gold or / and silver to the mass of the positive electrode material is 1:(0.01-1). The electronic orbital effect of the nano-gold or / and silver is used to complex polysulfide in order to make products in the discharge process maximally fixed in a positive electrode region, so the self discharge phenomenon caused by the dissolution of the polysulfide is effectively inhibited, thereby the coulomb efficiency and the cycle stability of the lithium sulfur battery are improved.

The invention discloses a control system and a control method of a flow battery system. The control system comprises a battery management system which is connected with a plurality of galvanic pile groups. The battery management system comprises a detection unit, a judging unit, a calculation unit and a control unit, wherein the detection unit is used for detecting actual output power of the flow battery system; the judging unit is used for judging whether the actual output power of the flow battery system is lower than a preset power or not; the calculation unit is used for calculating the quantity of the needed galvanic pile groups according to the actual output power of the flow battery system and rated output power of each galvanic pile group when the actual output power of the flow battery system is lower than the preset power; the control unit is used for controlling the work state of each galvanic pile group so as to enable the quantity of the galvanic pile groups under the running state to be equal to that of the needed galvanic pile groups. By adopting the control system and the control method, not only can the efficiency of the flow batter system be improved, but also the service life and efficiency of the galvanic pile groups can always stay at an optimal state, the electrolyte is unnecessary to flow into each galvanic pile, and the self-discharging phenomenon caused by the playing and migration of electrolyte when passing an ion exchanging membrane can be reduced.