Patent ID: 7410730

Claim:
A solid amorphous electrolyte composition for a thin-film battery comprising a lithium phosphorus oxynitride material containing an aluminum ion dopant, wherein the atomic ratio of aluminum ion to phosphorus ion (Al/P) in the electrolyte ranges from greater than zero up to about 0.5, and wherein the composition is represented by the formula: Li t P x Al y O u N v S w , where 5x+3y=5, 2u+3v+2w=5+t, t ranges from about 2.9 to about 3.3, x ranges from about 0.94 to about 0.85, y ranges from about 0.094 to about 0.26, u ranges from about 3.2 to about 3.8, v ranges from about 0.13 to about 0.46, and w ranges from zero to about 0.2.