FICTIONAL DOCUMENT-REVIEW EXERCISE — NOT AN AUTHENTIC RECORD
All people, organizations, identifiers, legal conclusions, clinical parameters,
and events are invented for text retrieval practice. Do not use as professional
advice, an authoritative standard, a real filing, or an operational instruction.

RECORD 2: PRIOR ART REFERENCE A — FICTIONAL REFERENCE A (EXCERPT)
Grant Date: 2020-11-24
Assignee: Kyoto Advanced Materials Corp.
Title: Tantalum-Doped Garnet Lithium Ion Conductor
Classification: H01M 10/0562, C04B 35/48

1. BACKGROUND AND DISCLOSURE
Discloses cubic garnet solid electrolytes formulated as Li_(7-y) La_3 Zr_(2-y) Ta_y O_12, where tantalum single-doping ranges from y = 0.20 to 0.60.
The document discloses that substituting Ta^5+ for Zr^4+ stabilizes cubic symmetry at room temperature.
Reported results: Bulk ionic conductivity at 25°C achieves a maximum of 1.02 mS/cm at y = 0.40. Sintering requires 1,220°C for 12 hours with Al2O3 contamination from crucible diffusion (0.8 wt% Al). Relative density reached 92.4%.
Critique/Difference: Does not disclose or suggest co-doping with trivalent scandium (Sc^3+). Explicitly teaches away from multi-element sub-lattice doping, stating that foreign trivalent ions induce secondary insulating LaScO3 phases that degrade conductivity.