Battery including multiple protective layers
A disclosed battery may include an anode, a cathode positioned opposite to the anode, a protective sheath disposed on the cathode, an electrolyte, and a separator. A polymeric network disposed on the anode and may include carbonaceous materials grafted with a plurality of fluorinated polymer chains cross-linked into a lattice. The lattice may produce an alkali metal fluoride in response to operational cycling of the battery. The alkali metal fluoride may be configured to suppress alkali metal dendrite formation from the anode. The protective sheath disposed on the cathode may include a tri-functional epoxy compound and a di-amine oligomer-based compound that can chemically react with each other. The electrolyte may disperse throughout the cathode and contact with the anode. As a result, the electrolyte may transport the alkali ions between the cathode and the anode. The separator may be positioned between the anode and the cathode.
1. A battery comprising:
an anode comprising a polymeric network including carbonaceous materials grafted with a plurality of fluorinated polymer chains cross-linked into a lattice, the anode configured to output a plurality of alkali ions during operational cycling of the battery;
a cathode positioned opposite to the anode;
a protective sheath disposed on the cathode, the protective sheath including a tri-functional epoxy compound and a di-amine oligomer-based compound configured to chemically react with each other;
an electrolyte at least partially dispersed throughout the cathode and in contact with the anode, the electrolyte configured to transport the plurality of alkali ions between the cathode and the anode; and
a separator positioned between the anode and the cathode.
2. The battery of claim 1 , wherein the lattice is configured to produce an alkali metal fluoride in response to operational cycling of the battery, the alkali metal fluoride configured to suppress alkali metal dendrite formation from the anode.
3. The battery of claim 1 , wherein the polymeric network is deposited over one or more exposed surfaces of the anode.
4. The battery of claim 1 , wherein the carbonaceous materials include one or more of flat graphene, wrinkled graphene, a plurality of carbon nano-tubes (CNTs), or a plurality of carbon nano-onions (CNOs).
5. The battery of claim 1 , wherein the plurality of fluorinated polymer chains includes a plurality of monomers, one or more monomers including 2,2,3,3,4,4,5,5,6,6,7,7-Dodecafluoroheptyl acrylate (DFHA), 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecyl methacrylate (HDFDMA), 2,2,3,3,4,4,5,5-Octafluoropentyl methacrylate (OFPMA), Tetrafluoropropyl methacrylate (TFPM), 3-[3,3,3-Trifluoro-2-hydroxy-2-(trifluoromethyl)propyl]bicyclo[2.2.1]hept-2-yl methacrylate (HFA monomer), or vinyl-based monomers including 2,3,4,5,6-Pentafluorostyrene (PFSt).
6. The battery of claim 1 , wherein the polymeric network has a thickness approximately between 0.001 μm and 5 μm.
7. The battery of claim 1 , wherein at least some of the plurality of fluorinated polymer chains are grafted to a surface of a respective one of the carbonaceous materials.
8. The battery of claim 1 , wherein the plurality of fluorinated polymer chains is configured to chemically interact with the one or more surfaces of the alkali metal of the anode via a Wurtz reaction.
9. The battery of claim 1 , wherein the carbonaceous materials comprise a plurality of graphene nanoplatelets dispersed throughout the polymeric network, wherein the graphene nanoplatelets are isolated from each other within the polymeric network.
10. The battery of claim 9 , wherein dispersion of the plurality of graphene nanoplatelets throughout the polymeric network includes one or more different concentration levels.
11. The battery of claim 9 , wherein at least some of the plurality of graphene nanoplatelets are functionalized with at least some of the plurality of fluorinated polymer chains.
12. The battery of claim 1 , wherein the polymeric network includes between approximately 0.001 wt. % to 2 wt. % of the fluorinated polymer chains.
13. The battery of claim 1 , wherein the polymeric network further comprises:
an interphase region in contact with the anode; and
a protective region disposed on top of the interphase region.
14. The battery of claim 13 , wherein the interphase region is based on a Wurtz reaction at an interface between the anode and the polymeric network.
15. The battery of claim 13 , wherein the interphase region includes one or more of a plurality of cross-linkable monomers including methacrylate (MA), acrylate, vinyl functional groups, or a combination of epoxy and one or more amine functional groups.
16. The battery of claim 13 , wherein the protective region is characterized by a density gradient.
17. The battery of claim 16 , wherein the density gradient is associated with one or more self-healing properties of the protective region.
18. The battery of claim 16 , wherein the density gradient is configured to strengthen the polymeric network.
19. The battery of claim 1 , wherein the polymeric network is configured to suppress dendritic growth from the anode.
20. The battery of claim 1 , wherein the anode further comprises one or more exposed surfaces, each exposed surface including one or more alkali metal-containing nanostructures or microstructures.
21. The battery of claim 20 , wherein each of the one or more alkali metal-containing nanostructures or microstructures includes at least some of the carbonaceous materials.
22. The battery of claim 1 , wherein the anode comprises a three-dimensional (3D) structure.
23. The battery of claim 1 , wherein the anode includes at least some adjacent graphene sheets configured to intercalate alkali metal ions.