LiNbOCl₄ (LNOC) Solid Electrolyte Powder

A Niobium-Based Soft Oxyhalide Superionic Conductor

LiNbOCl₄, abbreviated LNOC, belongs to the recently discovered family of soft oxyhalide solid electrolytes, first reported in the LiMOCl₄ (M = Nb, Ta) system by Tanaka and co-workers. These materials combine the high oxidation stability of halide-based solid electrolytes with the fast Li⁺ transport associated with mixed oxygen–chlorine anion frameworks. Within this family, LiNbOCl₄ has emerged as one of the most highly conducting members yet characterized.

The high ionic conductivity of LNOC arises from a Li-disordered tetragonal crystal structure consisting of isolated 1-D [NbOCl₄]⁻ anionic chains with energetically favorable orientational disorder. This disorder couples to multiple equi-energetic Li⁺ sites in the lattice, producing a soft, flexible framework that supports fast Li⁺ migration even in cold-pressed powder form — a property critical for practical all-solid-state battery (ASSB) cell assembly.

Xnergy Materials supplies research-grade LiNbOCl₄ powder for academic and industrial laboratories developing next-generation cold-pressed solid-state cells, particularly those targeting high-voltage layered oxide cathode pairing. The material is vacuum-sealed under argon, in stock, and ships within one week of order confirmation.

The Case for LiNbOCl4 in ASSB Research

Niobium oxychloride solid electrolytes — and LiNbOCl₄ in particular — occupy a distinctive position in the broader solid electrolyte landscape. As a niobium oxychloride material, LNOC combines the high room-temperature ionic conductivity typical of leading sulfide systems with the wide electrochemical window of halide chemistries, while remaining cold-press compatible without high-temperature sintering. Among the soft oxyhalide superionic conductors reported to date, LiNbOCl₄ exemplifies this trade-off resolution and has emerged as one of the most actively studied niobium oxychloride compositions in the all-solid-state battery research community.

Niobium chemistry: familiar, abundant, scalable

Niobium has a well-established role in lithium battery research as a coating constituent (LiNbO₃ is a standard cathode-coating chemistry for high-nickel NCM). Compared with tantalum, niobium offers significantly greater natural abundance and lower raw-material cost, which makes Nb-based oxyhalides such as LNOC attractive for research programs concerned with eventual scale-up. From a chemical standpoint, Nb(V) and Ta(V) form analogous oxychlor complexes, so LiNbOCl₄ and LiTaOCl₄ are widely used as parallel research samples for studying central-metal effects in oxyhalide electrolytes.

High-voltage cathode compatibility

One of the principal limitations of sulfide solid electrolytes such as LPSC and LGPS is their narrow oxidation stability against high-voltage layered oxide cathodes. LiNbOCl₄, with its mixed-anion framework and oxychloride character, demonstrates stable interfaces with both LiCoO₂ at 4.6 V and high-nickel NCM (Ni83) cathodes — making it a useful candidate for high-energy-density ASSB studies.

Cold-press compatibility for cell fabrication

LNOC retains its high ionic conductivity in cold-pressed powder form, enabling solid-state cell assembly at room temperature without densification at elevated temperature. This is a key practical advantage relative to garnet-type or NASICON-type oxide solid electrolytes, which generally require high-temperature sintering to reach acceptable grain-boundary contact.

Three Solid Electrolytes for Comparative Research

Xnergy Materials currently supplies three members of the lithium oxychloride solid electrolyte family, enabling direct LNOC vs LTOC comparison studies as well as broader research into how central-metal substitution (Nb vs Ta) and lithium stoichiometry (Li:M ratio) influence ionic transport, microstructure, and cathode interfacial behavior in oxyhalide systems. For research groups designing parallel LNOC vs LTOC experiments under identical cell architectures, all three products are available in stock from a single supplier.

Researchers studying polyanion structure, Li⁺ migration pathways, and composition–property relationships in lithium-ion superionic conductors frequently acquire two or all three of these products together. Common comparison axes include: Nb vs Ta central-metal effects (LNOC vs LiTaOCl₄, often searched as "LNOC vs LTOC"), lithium stoichiometry effects (LiTaOCl₄ vs Li₂TaOCl₆), and broad oxyhalide chemistry benchmarking against sulfide and oxide systems.

LNOC Across Four Chemistry Families

Solid electrolytes are typically grouped into four chemistry families. Each comes with its own performance trade-offs. LiNbOCl₄ sits in the soft oxyhalide branch of halide-derived electrolytes and combines characteristics of both halide and oxide chemistries.

The oxyhalide row reflects literature-reported ranges for the LiMOCl₄ family. Reported room-temperature conductivities for optimized LiNbOCl₄ have reached ~10–11 mS/cm under specific synthesis and processing conditions (Newnham et al., JACS 2024; Tanaka et al., 2023), placing the family at the high end of all currently characterized lithium-ion solid electrolytes.

Representative Electrochemical Data

The figure below shows representative measurements taken on Xnergy's research-grade LiNbOCl₄ powder, including impedance spectroscopy (Nyquist plot), X-ray diffraction phase identification, variable-temperature Arrhenius analysis (Eₐ = 0.256 eV), and charge–discharge curves of full all-solid-state cells with LCO at 4.6 V and Ni83 high-nickel layered oxide cathodes. The data reflect typical batch performance; per-batch characterization reports (XRD, EIS, particle-size analysis) are available with technical data sheets on request.

Figure 5 · Comprehensive characterization

Electrochemical & Structural Data Summary

Top row, left → right: Nyquist plot from room-temperature impedance spectroscopy showing low interfacial resistance; X-ray diffraction pattern confirming the LiNbOCl₄ crystalline phase; Arrhenius plot of ln(σT) vs 1000/T yielding a Li⁺ migration activation energy of 0.256 eV.
Bottom row, left → right: Charge–discharge curve of an LCO | LNOC | LPSC | Li-In cold-pressed all-solid-state cell at 28 °C, 7 mg/cm² loading, with 96.7% first-cycle Coulombic efficiency at a 4.6 V upper cutoff; Charge–discharge curve of a Ni83 | LNOC | LPSC | Li-In cell with 87.8% first-cycle Coulombic efficiency, demonstrating compatibility with high-nickel layered cathode chemistries.

Material Properties & Packaging

Where LiNbOCl₄ Fits in Battery R&D

LiNbOCl₄ is intended primarily for advanced solid-state battery research at universities, national laboratories, and corporate R&D programs. Typical research applications for LNOC powder include:

Researchers comparing niobium oxychloride electrolytes against established sulfide systems (LPSC, LGPS) or oxide systems (LLZO, LATP) often pair LiNbOCl₄ with our other in-stock solid-state electrolytes for direct head-to-head benchmarking under identical cell architectures. Typical experimental endpoints include interfacial impedance measurements, composite cathode fabrication using LNOC as a catholyte, electrochemical stability window determination, and Li⁺ migration pathway analysis. The Xnergy oxychloride family — LNOC, LiTaOCl₄, and Li₂TaOCl₆ — additionally enables controlled studies of how central-metal substitution and lithium stoichiometry alter Li⁺ transport within the same broad chemistry, supporting the next generation of lithium-ion superionic conductor research.

Beyond Standard Pack Sizes

For projects whose requirements exceed our standard pack sizes, or that require composition or particle-size adjustments, Xnergy Materials offers extended supply, bulk purchase agreements, and joint development services for LiNbOCl4 (LNOC) and the wider niobium oxychloride product family. We work directly with research teams as a direct supplier to align material specifications with experimental needs, and we typically return quotes for bulk orders within one to two business days.

Frequently Asked Questions

Other Solid Electrolytes from Xnergy

Researchers often pair LiNbOCl₄ with other solid electrolyte families for benchmarking studies. The following materials are also stocked at Xnergy:

Selected Literature on LiNbOCl₄ & Soft Oxyhalides

For researchers new to the oxyhalide family, the following references provide background on LiNbOCl₄ structure, ion-transport mechanisms, and synthesis strategies:

1. Newnham, J. A. et al. (2024). Critical Role of Framework Flexibility and Disorder in Driving High Ionic Conductivity in LiNbOCl₄. Journal of the American Chemical Society.
2. Tanaka, Y. et al. (2023). New Oxyhalide Solid Electrolytes with High Lithium Ionic Conductivity >10 mS/cm for All-Solid-State Batteries. (LiTaOCl₄: 12.4 mS/cm; LiNbOCl₄: 10.7 mS/cm.)
3. Yu, T. et al. (2023). A family of oxychloride amorphous solid electrolytes for long-cycling all-solid-state lithium batteries. Nature Communications.
4. Jeon, S. et al. (2025). Hydrochloric acid-free synthesis of LiNbOCl₄ superionic conductor for all-solid-state Li batteries. Solid State Ionics.
5. Newnham, J. A. et al. (2024). Origin of Fast Li⁺-Ion Conductivity in the Compressible Oxyhalide LiNbOCl₄. Energy Storage Materials.
6. Recent reviews on chloride and oxyhalide solid electrolytes — ACS Energy Letters, 2025.
7. Solid-state battery — Wikipedia overview.

References listed for general scientific background. Per-batch characterization reports specific to Xnergy LiNbOCl₄ material lots are available with technical data sheets upon request.