Li₂TaOCl₅ (LTOC) Tantalum-Based Halide Solid-State Electrolyte

Name: LTOC Tantalum-Based Halide Solid-State Electrolyte (Li₂TaOCl₅)

Material Form: Powder

Product Code: XN-LTOC

Description:

LTOC (Li₂TaOCl₅) is a tantalum-based halide-oxide solid-state electrolyte engineered for next-generation high-voltage all-solid-state lithium batteries (ASSLBs). With 6–8 mS/cm room-temperature ionic conductivity and stability up to 4.6 V vs Li/Li⁺, this material delivers performance that exceeds conventional halide and matches sulfide electrolytes. As a result, LTOC enables direct compatibility with high-voltage LCO (4.6 V) and high-nickel NCM cathodes for maximum energy density. Furthermore, as the tantalum analog of LNOC (LiNbOCl₄), it offers comparable performance with potentially improved chemical stability.

Application:

This material serves as a high-conductivity, high-voltage catholyte for all-solid-state lithium batteries. Especially suitable for 4.6 V LCO ASSLB cells, high-nickel NCM/Ni83 systems, and sulfide-halide composite electrolyte architectures (paired with LPSC as anode-side separator). Additionally, it works well in high-power solid-state pouch cells and pilot-scale ASSLB manufacturing.

Specifications:

Values measured by Xnergy. Typical values for reference; not guaranteed unless otherwise specified.

Characteristics:

Ultra-high room-temperature conductivity

At 6–8 mS/cm at 28 °C, this material exceeds most halide electrolytes by an order of magnitude. Moreover, it matches or surpasses leading sulfide electrolytes (e.g., Li₆PS₅Cl ~5 mS/cm), without the cathode interface compatibility issues of sulfides.

4.6 V high-voltage stability

The electrolyte remains stable in direct contact with 4.6 V LCO cathodes. Therefore, it enables access to the high-voltage capacity region (180+ mAh/g) inaccessible to conventional halide and sulfide electrolytes — critical for maximum-energy-density ASSLB designs.

Low activation energy

An activation energy of Ea = 0.256 eV indicates rapid Li-ion transport with weak temperature dependence. Consequently, this supports consistent performance across a wide operating temperature range (12.6–71.7 °C validated by Arrhenius analysis).

Validated in high-voltage ASSLB cells

In LCO (4.6 V) | LTOC | LPSC | Li-In configuration, the cell delivers ~180 mAh/g at 96.7% coulombic efficiency. Similarly, Ni83 | LTOC | LPSC | Li-In achieves ~210 mAh/g at 87.8% coulombic efficiency. Both tested at 7 mg/cm² loading, 28 °C.

Performance Data:

(Top left) EIS Nyquist plot showing low bulk resistance, ~7 mS/cm @ 28 °C. (Top center) XRD pattern of Li₂TaOCl₅ with reference patterns LiCl (PDF 04-0664) and NbCl₅ (PDF 09-0123) for comparison. (Top right) Arrhenius plot of conductivity vs temperature (12.6–71.7 °C), Ea = 0.256 eV. (Bottom left) LCO (4.6V) | LTOC | LPSC | Li-In cell, ~180 mAh/g, 96.7% coulombic efficiency. (Bottom center) Ni83 | LTOC | LPSC | Li-In cell, ~210 mAh/g, 87.8% coulombic efficiency.

Packaging & Storage:

The material ships vacuum-sealed under inert atmosphere in moisture-barrier aluminum-laminated bags. Therefore, customers should store it sealed in Ar or N₂ glovebox, protected from moisture. Because LTOC is moisture-sensitive, handle exclusively in a dry environment with dew point < –40 °C. Reseal promptly after opening.

Safety:

For research and industrial use only. Wear PPE (gloves, masks, safety goggles). Refer to SDS for complete safety information.

Note: Values listed above are typical and for reference only. Performance may vary depending on cell architecture, cathode selection, electrolyte separator, and test protocol. Compare with our other halide electrolytes: LNOC (LiNbOCl₄) at ~7 mS/cm, LZCO (Li₂ZrOCl₄) at 1.55 mS/cm, Al-Doped LZC at 0.7 mS/cm, LZC (Li₂ZrCl₆) at 0.3 mS/cm, and LYC (Li₃YCl₆) at 0.3–0.4 mS/cm.