Composition, article, method of forming article, anode-free rechargeable battery and forming method thereof, and battery

Abstract

A composition for forming an artificial sold electrolyte interphase (SEI) layer includes a polymer, an artificial SEI forming salt, and a solvent. The polymer and the artificial SEI forming salt are dispersed in the solvent.

1 - 20 . (canceled) 
     
     
         21 . A solid electrolyte interphase (SEI) layer on an electrode of a battery, wherein the SEI layer is formed from a composition comprising:
 a polymer;   an artificial SEI forming salt comprising a lithium salt and InF 3 ; and   a solvent,   wherein the polymer and the artificial SEI forming salt are dispersed in the solvent, the lithium salt and InF 3  of the artificial SEI forming salt induce formation of lithium fluoride or lithium nitride in the SEI layer.   
     
     
         22 . The SEI layer of  claim 21 , wherein the polymer comprises at least one selected from the group consisting of poly(ethylene) (PE), poly(ethylene oxide) (PEO), poly(propylene) (PP), poly(propylene oxide), polymethyl methacrylate (PMMA), polyacrylonitrile (PAN), poly[bis(methoxy ethoxyethoxide) phosphazene], poly(dimethylsiloxane) (PDMS), cellulose, cellulose acetate, cellulose acetate butylate, cellulose acetate propionate, polyvinylidene difluoride (PVDF), polyvinylpyrrolidone (PVP), polystyrene sulfonate (PSS), polyvinylchloride (PVC), poly(vinylidene chloride), polypropylene oxide, polyvinylacetate, polytetrafluoroethylene, poly(ethyleneterephthalate) (PET), polyimide, polyhydroxyalkanoate (PHA), polystyrene (PS), PEO copolymers, poly(methyl methacrylate) (PMMA)-PEO copolymers, poly(acrylonitrile-co-methylacrylate), polyvinylidenefluoride-co-hexafluoropropylene (PVDF-co-HFP), poly(methylmethacrylate-co-ethylacrylate), polyvinyl alcohol (PVA), polypropylene carbonate (PPC), polyacrylic acid (PAA), styrene-butadiene rubber (SBR), and the derivatives thereof. 
     
     
         23 . The SEI layer of  claim 21 , wherein the polymer comprises an ionomer comprising at least one anion selected from the group consisting of —COO − , —(CF 2 ) 3 COO − , —SO 3   − , —CF 2 SO 3   − , —CF(CF 3 )SO 3   − , and C 6 H 5 SO 3   − . 
     
     
         24 . The SEI layer of  claim 21 , wherein the polymer is an ionic polymer selected from the group consisting of: 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         25 . The SEI layer of  claim 21 , wherein the polymer has a concentration of between 0.5 wt % and 20 wt % based on total weight of the composition. 
     
     
         26 . The SEI layer of  claim 21 , wherein the lithium salt of the artificial SEI forming salt is lithium perchlorate (LiClO 4 ), lithium hexafluorophosphate (LiPF 6 ), lithiumborofluoride (LiBF 4 ), lithium hexafluoroarsenide (LiAsF 6 ), lithium trifluoro-metasulfonate (LiCF 3 SO 3 ), bis-trifluorom-ethyl sulfonylimide lithium (LiN(CF 3 SO 2 ) 2 ), lithium bis(oxalato)borate (LiBOB), lithium oxalyldifluoroborate (LiBF 2 C 2 O 4 ), lithium nitrate (LiNO 3 ), Li-fluoroalkyl-phosphates (LiPF 3 (CF 2 CF 3 ) 3 ), lithium bisperfluoro-ethysulfo-nylimide (LiBETI), lithium bis(trifluoromethanesulphonyl) imide, lithium bis(fuorosulphonyl)imide, lithium trifluoromethanesulfonimide (LiTFSI), lithium bis(fluo-rosulfonyl)imide (LiFSI), lithium difluoro(oxalato)borate (LiDFOB), lithium perchlorate (LiClO 4 ), LiC(CF 3 SO 2 ) 3 , LiF, LiCl, LiBr, LiI, Li 2 SO 4 , LiNO 3 , Li 3 PO 4 , Li 2 CO 3 , Li 2 O, LiOH, lithium acetate, lithium trifluoromethyl acetate, lithium oxalate or a combination thereof. 
     
     
         27 . The SEI layer of  claim 21 , wherein the artificial SEI forming salt comprises LiNO 3  and InF 3 . 
     
     
         28 . The SEI layer of  claim 27 , wherein the artificial SEI forming salt comprises LiNO 3  and InF 3  with a weight ratio of between 10:1 and 1:10. 
     
     
         29 . The SEI layer of  claim 21 , wherein the artificial SEI forming salt has a concentration of between 0.5 wt % and 8 wt % based on a total weight of the composition. 
     
     
         30 . The SEI layer of  claim 21 , wherein the solvent comprises at least one selected from the group consisting of dimethoxyethane (DME), diglyme, triglyme, tetraglyme, diethyl ether, 1,3-dioxolane, 1,4-dioxane, tetrahydrofuran, 2,5-dimethyltetrahydrofuran, dichloromethane, acetone, dimethyl sulfoxide (DMSO), dimethylformamide (DMF), dimethylacetamide (DMAC), N-methyl-2-pyrrolidone (NMP), and chloroform. 
     
     
         31 . A battery comprising an anode, wherein the SEI layer of  claim 21  is formed on surface of the anode. 
     
     
         32 . The battery of  claim 31 , wherein the SEI layer is formed with a stable colloidal solution comprising 0.5 wt % PEO and 2 wt % of the SEI forming salt in THF, wherein the SEI forming salt consists of LiNO 3  and InF 3 . 
     
     
         33 . The battery of  claim 32 , wherein the weight ratio of LiNO 3  and InF 3  is 1:1. 
     
     
         34 . The battery of  claim 32 , wherein the battery has a retention rate of at least 90% after 20 cycles at a rate of 0.1C. 
     
     
         35 . The battery of  claim 32 , wherein the battery has a retention rate of 96.7% after 20 cycles at a rate of 0.1C. 
     
     
         36 . The battery of  claim 31 , wherein the SEI layer has a thickness of 0.5 μm to 20 μm. 
     
     
         37 . The battery of  claim 31 , further comprising a current collector comprising at least one selected from the group consisting of aluminum, copper, nickel, iron, stainless steel, and carbon fiber. 
     
     
         38 . The battery of  claim 31 , wherein the battery has a charge transfer resistance (R CT ) of no more than 67.94 Ω/cm 2 . 
     
     
         39 . The battery of  claim 31 , wherein the battery is an anode-free battery. 
     
     
         40 . The battery of  claim 31 , wherein the battery is a rechargeable battery.