An electrolyte, an electrochemical device containing same, and an electronic device. Specifically, an electrolyte, including dimethyl carbonate, ethyl methyl carbonate, and lithium bis(oxalato)borate. The ethyl methyl carbonate and the lithium bis(oxalato)borate each account for a specified weight percent in the electrolyte, and the weight percent of the dimethyl carbonate and the weight percent of the ethyl methyl carbonate in the electrolyte meet a specified relationship. The electrolyte provides with balanced rate performance, the low-temperature discharge performance, and the high-temperature storage and cycle performance of the electrochemical device, and helps to achieve excellent comprehensive performance of the electrochemical device.

The present invention relates to thermotropic ionic liquid crystal molecules of general formula (I) ##STR00001##
With E.sub.1 and E.sub.2, which may be identical or different, representing, independently of one another, a linear, saturated and unsubstituted C.sub.10 to C.sub.14 hydrocarbon-based radical, A.sup.x− representing a sulfonate anion or a sulfonylimide anion of formula —SO.sub.2—N.sup.−—SO.sub.2C.sub.yF.sub.2y+1 with y being an integer ranging from 0 to 2 and C.sup.x+ a sodium, lithium or potassium ion, most particularly advantageous for their conductivity performance qualities as an electrolyte in particular for lithium batteries.

The present invention relates to thermotropic ionic liquid crystal molecules of general formula (I) ##STR00001##
With E.sub.1 and E.sub.2, which may be identical or different, representing, independently of one another, a linear, saturated and unsubstituted C.sub.10 to C.sub.14 hydrocarbon-based radical, A.sup.x− representing a sulfonate anion or a sulfonylimide anion of formula —SO.sub.2—N.sup.−—SO.sub.2C.sub.yF.sub.2y+1 with y being an integer ranging from 0 to 2 and C.sup.x+ a sodium, lithium or potassium ion, most particularly advantageous for their conductivity performance qualities as an electrolyte in particular for lithium batteries.

In order to solve the problem of insufficient cycle performance and high-temperature storage performance of the existing non-aqueous electrolyte for lithium ion battery containing maleic anhydride copolymer, the application provides a non-aqueous electrolyte for lithium ion battery. The non-aqueous electrolyte for lithium ion battery comprises a compound A represented by formula I and a compound B represented by formula II, ##STR00001## In formula I, R.sub.7 and R.sub.8 are independently selected from one of hydrogen atom, halogen atom, —O—R.sub.9 or aryl, wherein n is a positive integer and R.sub.9 is a C1-C4 alkyl group; In formula II, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each independently selected from one of hydrogen atom, fluorine atom and C1-C5 group. The non-aqueous electrolyte for lithium ion battery provided by the invention can improve the cycle stability and high-temperature storage performance of the battery through the effections of compound A and compound B.

In order to solve the problem of insufficient cycle performance and high-temperature storage performance of the existing non-aqueous electrolyte for lithium ion battery containing maleic anhydride copolymer, the application provides a non-aqueous electrolyte for lithium ion battery. The non-aqueous electrolyte for lithium ion battery comprises a compound A represented by formula I and a compound B represented by formula II, ##STR00001## In formula I, R.sub.7 and R.sub.8 are independently selected from one of hydrogen atom, halogen atom, —O—R.sub.9 or aryl, wherein n is a positive integer and R.sub.9 is a C1-C4 alkyl group; In formula II, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each independently selected from one of hydrogen atom, fluorine atom and C1-C5 group. The non-aqueous electrolyte for lithium ion battery provided by the invention can improve the cycle stability and high-temperature storage performance of the battery through the effections of compound A and compound B.

A non-aqueous electrolyte solution for a lithium secondary battery, and a lithium secondary battery including the same are disclosed herein. In some embodiments, the non-aqueous electrolyte solution for a lithium secondary battery includes a lithium salt, an organic solvent, and a compound represented by the following Formula 1, and has an excellent effect of scavenging decomposition products generated from the lithium salt, and thus, may improve overall performance of the battery:

##STR00001## wherein in Formula 1, A is a C1 to C5 alkyl group.

A battery includes a positive electrode containing sulfur, a negative electrode containing a material for occluding and releasing a lithium ion, and an electrolytic solution. The electrolytic solution contains at least one of a liquid complex and a liquid salt in which a polysulfide is insoluble or almost insoluble, and a solvent in which a polysulfide is soluble. The electrolytic solution has a Li.sub.2S.sub.8 saturation sulfur concentration of 10 mM or more and 400 mM or less.

Provided is a composition for a non-aqueous secondary battery porous membrane capable of forming a porous membrane having excellent peel strength and capable of providing a non-aqueous secondary battery having excellent output characteristics. The composition for a non-aqueous secondary battery porous membrane contains inorganic particles, a binder, a surfactant, and water. The binder includes a polymer including an aromatic vinyl monomer unit. Fractional content of the surfactant is not less than 0.25 parts by mass and not more than 5 parts by mass per 100 parts by mass of the inorganic particles.

Provided is a composition for a non-aqueous secondary battery porous membrane capable of forming a porous membrane having excellent peel strength and capable of providing a non-aqueous secondary battery having excellent output characteristics. The composition for a non-aqueous secondary battery porous membrane contains inorganic particles, a binder, a surfactant, and water. The binder includes a polymer including an aromatic vinyl monomer unit. Fractional content of the surfactant is not less than 0.25 parts by mass and not more than 5 parts by mass per 100 parts by mass of the inorganic particles.

An electrode and a lithium-ion battery employing the electrode are provided. The electrode includes an active layer, a conductive layer, and a non-conductive layer. The conductive layer is disposed on the top surface of the active layer. The conductive layer includes a first porous film and a conductive lithiophilic material, and the conductive lithiophilic material is within the first porous film and covers the inner surface of the first porous film. The non-conductive layer includes a second porous film and a non-conductive lithiophilic material, and the non-conductive lithiophilic material is within the second porous film and covers the inner surface of the second porous film. The conductive layer is disposed between the active layer and the non-conductive layer. The binding energy (ΔG) of the lithiophilic material with lithium is less than or equal to −2.6 eV.