Battery

Abstract

A battery is provided. The battery includes a positive electrode, a negative electrode, and a solid electrolyte membrane. The positive electrode includes a positive active layer. The negative electrode includes a negative active layer and a modified layer, wherein the modified layer is disposed on the negative active layer. The modified layer includes a metal fluoride and a lithium-containing compound. The solid electrolyte membrane includes a first porous layer, an electrolyte layer, and a second porous layer, wherein the electrolyte layer is disposed between the first porous layer and the second porous layer.

What is claimed is: 
     
         1 . A battery, comprising:
 a positive electrode, comprising a positive electrode active layer;   a negative electrode, wherein the negative electrode comprises a negative active layer and a modified layer which is disposed on the negative active layer, and wherein the modified layer comprises a metal fluoride and a lithium-containing compound; and   a solid electrolyte membrane disposed between the positive electrode and the negative electrode, wherein the solid electrolyte membrane comprises a first porous layer, an electrolyte layer, and a second porous layer, wherein the electrolyte layer is disposed between the first porous layer and the second porous layer.   
     
     
         2 . The battery as claimed in  claim 1 , wherein the weight ratio of the metal fluoride to the lithium-containing compound is 1:1 to 1:10. 
     
     
         3 . The battery as claimed in  claim 1 , wherein the metal fluoride is copper fluoride, zinc fluoride, nickel fluoride, titanium fluoride, aluminum fluoride, silicon fluoride, or a combination thereof. 
     
     
         4 . The battery as claimed in  claim 1 , wherein the lithium-containing compound is lithium nitrate, lithium trifluorocarbonate, lithium trifluoromethanesulfonate, lithium hexafluorophosphate, lithium perchlorate, lithium thiocyanate, lithium hexafluoroarsenate, Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), lithium bis(fluorosulfonyl)imide (LiFSI), or a combination thereof. 
     
     
         5 . The battery as claimed in  claim 1 , wherein the modified layer further comprises an imide compound. 
     
     
         6 . The battery as claimed in  claim 5 , wherein the imide compound is succinimide, phthalimide, glutarimide, maleimide, or a combination thereof. 
     
     
         7 . The battery as claimed in  claim 5 , wherein the imide compound is from 10 wt % to 50 wt %, based on the weight of the modified layer. 
     
     
         8 . The battery as claimed in  claim 1 , wherein the modified layer has a thickness from 1 μm to 10 μm. 
     
     
         9 . The battery as claimed in  claim 1 , wherein the porosity of the first porous layer is 10 vol % to 90 vol % and the porosity of the second porous layer is from 10 vol % to 90 vol %. 
     
     
         10 . The battery as claimed in  claim 1 , wherein the solid electrolyte membrane has a thickness from 1 μm to 200 μm. 
     
     
         11 . The battery as claimed in  claim 1 , wherein the ratio of the thickness of the electrolyte layer to the thickness of the solid electrolyte membrane is 1:5 to 4:5. 
     
     
         12 . The battery as claimed in  claim 1 , wherein the first porous layer comprises a polymer and a plurality of pores and the second porous layer comprises a polymer and a plurality of pores, wherein the polymer of the first porous layer and the polymer of the second porous layer are independently polydimethylsiloxane (PDMS), polyvinylchloride (PVC), polycarbonate (PC), polypropylene (PP), polyacrylic acid (PAA), poly(methyl methacrylate) (PMMA), polyethylene terephthalate (PET), polyacrylonitrile (PAN), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), perfluoroalkoxy alkane (PFA), fluorinated ethylene propylene (FEP), poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), styrene-butadiene rubber (SBR), nitrile-butadiene rubber (NBR), or a combination thereof 
     
     
         13 . The battery as claimed in  claim 1 , wherein the electrolyte layer is formed from a first composition, wherein the first composition comprises:
 (A) 100 parts by weight of oxide-based solid state inorganic electrolyte;   (B) 20 to 70 parts by weight of Li[R 2 (—OR 1 ) n —OR 2 ]Y, wherein R 1  is C 1-4  alkylene group, R 2  is C 1-4  alkyl group, n is from 2 to 100, and Y is PF 6   − , BF 4   − , AsF 6   − , SbF 6   − , ClO 4   − , AlCl 4   − , GaCl 4   − , NO 3   − , C(SOCF 3 ) 3   − , N(SO 2 CF 3 ) 2   − , SCN − , O 3 SCF 2 CF 3   − , C 6 F 5 SO 3   − , O 2 CCF 3   − , SO 3 F − , B(C 6 H 5 ) 4   − , CF 3 SO 3   − , or a combination thereof;   (C) 1 to 10 parts by weight of nano-oxide; and   (D) 1 to 20 parts by weight of binder.   
     
     
         14 . The battery as claimed in  claim 13 , wherein a second composition is disposed within the plurality of pores of the first porous layer and the second porous layer, wherein the second composition has the same definition as that given for the first composition. 
     
     
         15 . The battery as claimed in  claim 14 , wherein the first porous layer consists of a first layer and a second layer, and the second porous layer consists of a third layer and a fourth layer, wherein the second composition is disposed within the pores of the second layer and the third layer, and the second composition is not disposed within the pores of the first layer and the fourth layer, wherein the solid electrolyte membrane sequentially comprises the first layer, the second layer, the electrolyte layer, the third layer, and the fourth layer in the direction from the negative electrode to the positive electrode. 
     
     
         16 . The battery as claimed in  claim 15 , wherein the thickness ratio of the first layer to the second layer is from 1:9 to 9:1, and the thickness ratio of the third layer to the fourth layer is from 1:9 to 9:1. 
     
     
         17 . The battery as claimed in  claim 1 , wherein the negative electrode active layer comprises a negative electrode active material, wherein the negative electrode active material comprises lithium, lithium alloy, meso carbon micro bead (MCMB), vapor grown carbon fiber (VGCF), carbon nanotube (CNT), graphene, coke, graphite, carbon black, acetylene black, carbon fiber, glassy carbon, lithium-containing compound, silicon, silicon-based alloy, tin, tin-based alloy, or a combination thereof. 
     
     
         18 . The battery as claimed in  claim 1 , wherein the positive electrode active layer comprises a positive electrode active material, wherein the positive electrode active material comprises elementary sulfur, organic sulfide, sulfur carbon composite, metal-containing lithium oxide, metal-containing lithium sulfide, metal-containing lithium selenide, metal-containing lithium telluride, metal-containing lithium phosphide, metal-containing lithium silicide, metal-containing lithium boride, or a combination thereof, wherein the metal is selected from a group consisting of aluminum, vanadium, titanium, chromium, copper, molybdenum, niobium, iron, nickel, cobalt, and manganese. 
     
     
         19 . The battery as claimed in  claim 1 , further comprising:
 a separator disposed between the solid electrolyte membrane and the positive electrode.   
     
     
         20 . The battery as claimed in  claim 1 , further comprising:
 an electrolyte liquid disposed between the negative electrode and the positive electrode.