Thin film battery and electrolyte therefor
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United States of America Patent
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Nov 16, 2004
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N/A
app pub date -
Jul 9, 2002
filing date -
Jul 9, 2002
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Abstract
A solid amorphous electrolyte composition for a thin-film battery. The electrolyte composition includes a lithium phosphorus oxynitride material containing a sulfide ion dopant wherein the atomic ratio of sulfide ion to phosphorus ion (S/P) in the electrolyte ranges greater than 0 up to about 0.2. The composition is represented by the formula: Li.sub.w PO.sub.x N.sub.y S.sub.z, where 2x+3y+2z=5+w, x ranges from about 3.2 to about 3.8, y ranges from about 0.13 to about 0.46, z ranges from greater than zero up to about 0.2, and w ranges from about 2.9 to about 3.3. Thin-film batteries containing the sulfide doped lithium oxynitride electrolyte are capable of delivering more power and energy than thin-film batteries containing electrolytes without sulfide doping.
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