An electrolyte for a lithium secondary battery according to embodiments of the present invention includes an organic solvent, a lithium salt, and an additive including a succinic anhydride-based compound substituted with a trialkoxysilyl alkyl group. A lithium secondary battery including the electrolyte provides enhanced cycle property and high temperature stability.

A rechargeable lithium battery comprising an anode, a cathode, and a hybrid electrolyte in ionic communication with the anode and the cathode, wherein: (a) the hybrid electrolyte comprises a mixture of a polymer and particles of an inorganic solid electrolyte; (b) the polymer is a polymerization or crosslinking product of a reactive additive, wherein the reactive additive comprises (i) a first liquid solvent that is polymerizable, (ii) an initiator or curing agent, and (iii) a lithium salt; (c) the polymer is present in the anode, the cathode, the separator, between the anode and the separator, or between the cathode and the separator; and (d) the hybrid electrolyte forms a contiguous phase in the cathode or in the anode, and occupies from 3% to 40% by volume of the cathode or from 3% to 40% by volume of the anode. Also provided is a process for producing the lithium cell.

Additives for energy storage devices comprising cyclodextrin-based compounds and their derivatives are disclosed. The energy storage device comprises a first electrode and a second electrode, where at least one of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, and an electrolyte composition. Cyclodextrin-based compounds may serve as additives to the first electrode, the second electrode, and/or the electrolyte.

The method for manufacturing a positive electrode active material for a non-aqueous electrolyte secondary battery according to one embodiment of the present invention comprises: a first step for adding an alkaline solution having a tungsten compound dissolved therein to a lithium-metal composite oxide powder represented by general formula Li.sub.zNi.sub.1-x-yCo.sub.xM.sub.yO.sub.2 (where 0≤x≤0.1, 0≤y≤0.1, and 0.97≤z≤1.20 are satisfied, and M is at least one type of element selected from among Mn, W, Mg, Mo, Nb, Ti, Si, and Al), and mixing same; and a second step for heating the mixture of the alkaline solution and the lithium-metal composite oxide powder at 100-600° C., wherein the amount of the alkaline solution to be added in the first step is 0.1-10 mass % with respect to the amount of the lithium-metal composite oxide powder.

The present disclosure discloses a primary lithium battery comprising a reactive solid cathode, a liquid electrolyte, a separator, and a lithium anode. The liquid electrolyte is ionic conductive and is configured to undergo a series coupling reaction after solid phase reaction of the reactive solid cathode and the lithium anode. The liquid electrolyte comprises a solvent and an electrolyte salt, and a concentration of the electrolyte salt in the liquid electrolyte is 0.1-3 mol/L. The solvent comprises a sulfite ester type compound and an organic solvent, and a concentration of the sulfite ester type compound in the organic solvent is 5 wt % to 90 wt %.

Silicon-polymer composite anodes; a method for producing the anodes; and dual salt electrolytes to improve the conductivity, specific capacity, rate capability, and stability of the anodes; suitable for use in electrochemical energy storage devices are disclosed.

A main object of the present disclosure is to provide a liquid electrolyte in which concentration of active fluoride ion is high. The present disclosure achieves the object by providing a liquid electrolyte to be used in a fluoride ion battery, the liquid electrolyte comprising: a potassium fluoride; an alkali metal amide salt including a cation of an alkali metal and an amide anion; and a glyme represented by a general formula R.sup.1—O(CH.sub.2CH.sub.2O).sub.n—R.sup.2, in which R.sup.1 and R.sup.2 is each independently an alkyl group including 4 or less carbon atoms or a fluoroalkyl group including 4 or less carbon atoms, and n is within a range of 2 to 10.

The present invention provides an electrolyte which is capable of retaining a high magnesium ion concentration. An electrolyte in accordance with an aspect of the present invention is obtained by mixing a solvent, metal magnesium, and an elemental halogen.

A variety of batteries are provided having a sulfur-containing cathode; a metal anode; and an electrolyte between the cathode and the anode, wherein the electrolyte is capable of solvating metal ions produced from the metal anode, polysulfide species produced from the sulfur containing cathode, and dissolved oxygen species. In some aspects, the batteries include a separator separating the battery into a cathode region nearest the cathode and an anode region nearest the anode, wherein the separator permits permeability of the electrolyte and the metal ions. Methods of using and batteries are also provided. In some aspects, the batteries are capable of charge/discharge cycles in excess of 10, 100, or 1000 cycles.

To provide a composition containing a sulfonylimide salt, which has excellent storage stability even at a high temperature and can be used for an electrolytic solution material or an electrolytic solution. The composition contains an electrolyte, a solvent, and an anion component. The electrolyte contains a sulfonylimide salt, the anion component contains an acid component having an acid-dissociation constant pKa (an acid-dissociation constant pKa1 in a first stage for a plurality of ionized acids) of 0 or more and 6.5 or less at a concentration of 50 ppm or more and 10000 ppm or less relative to the electrolyte, a concentration of fluoride ion is 100 ppm or less relative to the electrolyte, and a concentration of sulfate ion is 100 ppm or less relative to the electrolyte.