An oligomer additive is provided. The oligomer additive is obtained by a reaction of a maleimide, a barbituric acid and a dibenzyl trithiocarbonate. A lithium battery including an anode, a cathode, a separator, an electrolyte solution and a package structure is also provided, wherein the cathode includes the oligomer additive.

An oligomer additive is provided. The oligomer additive is obtained by a reaction of a maleimide, a barbituric acid and a dibenzyl trithiocarbonate. A lithium battery including an anode, a cathode, a separator, an electrolyte solution and a package structure is also provided, wherein the cathode includes the oligomer additive.

Condensation of fluoro-substituted and silyl-substituted monomers provides polymers suitable for use, e.g., as engineering polymers. A monomer composition is condensed in the presence of a basic catalyst. The monomer composition contains a compound of formula FXF and a compound of formula (R.sup.1).sub.3SiZSi(R.sup.1).sub.3, and forms an alternating XZ polymer chain and a silyl fluoride byproduct. X has the formula -A(R.sup.2-A)n-; each A is SO.sub.2, C(O), or Het; R.sup.2 is an organic moiety; n is 0 or 1; Het is an aromatic nitrogen heterocycle; Z has the formula -L-R.sup.3-L; each L is O, S, or N(R.sup.4); and each R.sup.3 is an organic moiety, and R.sup.4 comprises H or an organic moiety.

An oligomer additive is provided. The oligomer additive is obtained by a reaction of a maleimide, a barbituric acid and a dibenzyl trithiocarbonate. A lithium battery including an anode, a cathode, a separator, an electrolyte solution and a package structure is also provided, wherein the cathode includes the oligomer additive.

An oligomer additive is provided. The oligomer additive is obtained by a reaction of a maleimide, a barbituric acid and a dibenzyl trithiocarbonate. A lithium battery including an anode, a cathode, a separator, an electrolyte solution and a package structure is also provided, wherein the cathode includes the oligomer additive.