Looking for sodium-ion dry pouch cells without electrolyte?
Xnergy Materials supplies seven research-grade sodium-ion dry pouch cells without electrolyte, in stock, shipping within one week. All cells are delivered dry (no electrolyte injected) — also called "unfilled" sodium-ion pouch cells — so researchers can inject their own custom electrolyte formulation. Cathodes span NFPP (Na4Fe3(PO4)2(P2O7), safest), NVP (Na3V2(PO4)3, highest voltage), and P2 layered oxide (highest energy density). Anode options include hard carbon, anode-free, and sodium metal. The catalog spans single-layer reference cells (sodium metal counter electrode) and multi-layer pouch cells from 1 Ah to 2 Ah. Prices start at $89 per cell.
Need matching sodium-ion materials? We supply matched sodium metal materials and battery electrolytes to pair with these dry cells. Contact us for bulk pricing (10+ cells), custom specs, or a complete matched package. Talk to our team →
01 / What They AreWhat Are Sodium-Ion Dry Pouch Cells — and Why Researchers Need Them
A sodium-ion dry pouch cell without electrolyte — also known as an unfilled sodium-ion pouch cell — is a pouch-format Na-ion battery cell manufactured and sealed without electrolyte. The cathode (NFPP, NVP, or P2 layered oxide), anode (hard carbon, bare current collector, or sodium metal foil), separator, and current collectors are all pre-assembled inside the aluminum-laminated pouch, but the electrolyte-injection step is left to the end user. This format is purpose-built for sodium-ion battery research groups studying custom electrolytes — sodium-salt liquid systems, polymer electrolytes, or hybrid approaches — where the electrolyte itself is the experimental variable.
The alternative — buying pre-filled sodium-ion cells — works fine when you're evaluating cathode chemistry or cell design at a high level, but it falls apart the moment your research focus shifts to the electrolyte. Any pre-injected solvent leaves residual signatures that contaminate your measurements. With an unfilled cell, the cell arrives as a clean platform: you inject exactly what you want to test, seal it inside your glove box, and cycle it against your own formulation.
Xnergy's sodium-ion dry pouch cell catalog is organized around three cathode chemistries — NFPP polyanionic, NVP NASICON, and P2 layered oxide — because that's how most sodium-ion research programs think about their cell platform. Each cathode targets a different research path: safety and long cycle life, high voltage and rate capability, and frontier energy density respectively. All seven SKUs ship as dry cells (without electrolyte), ready for your custom electrolyte injection.
Sodium-ion research groups studying electrolyte additives, novel salt systems, or solid-state hybrids need a dry cell platform without supplier electrolyte residue. Xnergy ships every sodium-ion pouch cell unfilled so you control the formulation, the additives, and the formation cycle from day one.
The representative cell geometry across the catalog uses aluminum current collectors on both electrodes — a key cost advantage of sodium-ion chemistry over lithium-ion (which requires copper on the anode side). Cell active area scales with capacity; specific dimensions and stack details are listed on each product page.
All sodium-ion dry pouch cell SKUs in one place
Browse specifications, compare chemistries, and order direct — ships within one week.
Dry pouch cell catalog →02 / NFPPFor Safety-First Research: NFPP Polyanionic Sodium-Ion Pouch Cells
NFPP — sodium iron pyrophosphate phosphate, Na4Fe3(PO4)2(P2O7) — is a polyanionic cathode that has gained traction for its exceptional thermal stability and long cycle life. The robust phosphate framework resists structural collapse during sodium extraction, making it the safest mainstream sodium-ion cathode. Iron-based composition makes it the most cost-favorable option for scale-up studies. Operating voltage ~3.0–3.2 V vs Na/Na+ with ~129 mAh/g theoretical specific capacity. Xnergy offers NFPP in two anode pairings — hard carbon and anode-free.
NFPP Polyanionic Sodium-Ion Pouch Dry Cell
The standard starting point for sodium-ion research. NFPP polyanionic cathode paired with hard carbon anode delivers commercial-relevant performance with the safest sodium-ion chemistry available. Iron-based composition keeps unit cost low for scale-up and multi-batch cycling studies. Aluminum current collectors on both electrodes — no copper required.
NFPP Anode-Free Pouch Dry Cell
Anode-free sodium-ion research on the safest cathode platform. Cells ship with a bare current collector — sodium plates directly during first charge, forming a thin Na metal layer in-situ. Ideal starting point for studying plating-stripping morphology, SEI formation on bare collectors, and electrolyte additive effects on metal deposition uniformity, without the high-voltage stress of NVP-based anode-free systems.
NFPP is the recommended starting point for groups new to sodium-ion research, programs focused on long-cycle stationary storage applications, and any study where cell-level safety and thermal behavior is a primary metric. Lower operating voltage means fewer demands on electrolyte stability, which makes it the easiest sodium-ion platform to baseline.
03 / NVPFor High-Voltage Research: NVP NASICON Pouch Cells
NVP — Na3V2(PO4)3 — delivers the highest operating voltage among commercialized sodium-ion cathodes and exhibits an exceptionally flat discharge plateau at ~3.4 V vs Na/Na+. The flat plateau is a feature researchers prize for precise SOC tracking and impedance studies. The NASICON crystal structure provides three-dimensional sodium-ion diffusion pathways, enabling superior rate capability compared to layered oxide alternatives. Theoretical specific capacity ~117 mAh/g. Xnergy offers NVP in hard carbon, anode-free, and sodium metal pairings — the broadest anode selection of any cathode in the catalog.
NVP Hard Carbon Anode Pouch Dry Cell
High-power sodium-ion research platform. NVP NASICON cathode at 3.4 V flat plateau, paired with hard carbon anode. Available in two capacities for cycle-life and rate-capability studies — the 2 Ah variant provides higher absolute capacity for statistically robust cycle-life measurements. Standard choice for fast-charge research and reference electrochemistry studies at higher voltages.
NVP Anode-Free Pouch Dry Cell
High-voltage anode-free electrolyte research platform. NVP cathode pushes the plating window beyond what NFPP-based anode-free systems experience, making this the cell of choice for advanced electrolyte additive screening at elevated potentials. Tighter coulombic efficiency demands than NFPP/anode-free — recommended for groups with prior anode-free experience.
Choose NVP for high-power applications, fast-charge research, programs requiring a flat-plateau reference electrochemistry, and electrolyte stability studies at elevated voltages. The NASICON 3D diffusion network makes it the best sodium-ion platform for rate-capability characterization.
04 / P2 OxideFor High-Energy Research: P2 Layered Oxide Pouch Cells
P2-type layered oxide cathodes — P2-Nax(TM)O2 where TM = Mn, Ni, Fe, or combinations — offer the highest energy density of any commercially available sodium-ion cathode. The P2 structure has sodium occupying prismatic sites between transition metal layers, enabling faster ion transport than O3-type counterparts. Operating voltage 3.5–4.0 V vs Na/Na+ with theoretical specific capacity 160–180 mAh/g — the closest sodium-ion equivalent to layered NCM cathodes in lithium-ion. Phase-transition challenges at high voltage make P2 oxide a particularly rich research target for transition metal substitution and structural characterization studies.
P2 Layered Oxide Sodium-Ion Pouch Dry Cell
Highest-energy-density sodium-ion cell in the catalog. P2 layered oxide cathode paired with hard carbon anode. Two capacity points: the 1 Ah variant for compact cycling studies, the 1.5 Ah variant for groups needing higher absolute energy per cell. Recommended for energy-density characterization, transition metal substitution research, and direct comparative studies versus layered lithium-ion cells (NCM/NCA).
Choose P2 oxide for maximum gravimetric energy density, structural characterization studies (XRD, neutron diffraction during cycling), transition metal substitution research, and comparative studies versus lithium-ion layered oxides. The phase-transition behavior at high voltage is itself a productive research target.
05 / Sodium MetalFor Reference Studies: Single-Layer Sodium Metal Pouch Cells
Sodium metal anode cells in single-layer pouch format serve as half-cell-equivalent reference platforms in pouch geometry. The single-layer construction means a single cathode-separator-anode sandwich without multi-layer stacking — this isolates intrinsic electrochemistry and allows direct cathode benchmarking under realistic packaging conditions, bridging the gap between coin-cell screening and multi-layer prototyping. Choose your cathode (NFPP, NVP, or P2) and use the sodium metal anode as a near-ideal counter electrode for clean cathode-focused electrochemistry.
Sodium Metal Single-Layer Pouch Battery Dry Cell (Unfilled)
Half-cell-equivalent reference platform in pouch format. Single-layer construction with sodium metal anode and your choice of cathode. Three configurations available — NFPP, NVP, or P2 layered oxide cathode — all sharing the same single-layer pouch geometry. Ideal for cathode benchmarking, comparative chemistry studies, and as a stepping stone between coin-cell screening and multi-layer prototype cells.
For programs producing their own sodium metal anodes or studying sodium metal handling, see our matched sodium metal materials catalog — sodium foils, ingots, and pre-deposited collector strips for sodium-ion battery research.
06 / Selection GuideCathode Selection Guide — NFPP vs NVP vs P2 Layered Oxide
The three sodium-ion cathodes in the Xnergy catalog occupy three different points on the safety-voltage-energy tradeoff curve. Every research program has its own priority on that curve — here's how to map your research question to the right cathode chemistry:
| Cathode | Operating voltage | Capacity | Best for |
|---|---|---|---|
| NFPP | ~3.0–3.2 V | ~129 mAh/g | Long-cycle stationary storage research, safety-focused studies, low-cost system modeling, scale-up programs. The safest sodium-ion cathode — easiest to baseline. |
| NVP | ~3.4 V flat plateau | ~117 mAh/g | High-power applications, fast-charge research, reference electrochemistry, electrolyte stability at higher voltages. Highest voltage, NASICON 3D diffusion enables superior rate capability. |
| P2 Oxide | ~3.5–4.0 V | ~160–180 mAh/g | High-energy-density characterization, structural studies, transition metal substitution research, Li-ion comparative studies. Highest energy density — closest analog to NCM-style layered cathodes. |
Anode strategy: hard carbon, anode-free, or sodium metal?
Once you've picked a cathode, the anode strategy depends on what your research program is trying to measure:
- Hard carbon anode — the commercial standard. Choose this for realistic full-cell performance data, cycle-life studies, electrolyte additive screening on a stable anode reference, and any research that needs to translate to production-relevant numbers. Default choice for most programs.
- Anode-free configuration — bare current collector, sodium plates in-situ during first charge. Choose this for plating-stripping morphology studies, SEI formation research on bare collectors, dendrite suppression strategies, and electrolyte additive effects on metal deposition. Maximum theoretical energy density, demanding electrolyte requirements.
- Sodium metal anode (single-layer) — half-cell-equivalent reference in pouch format. Choose this for direct cathode benchmarking, comparative chemistry studies isolating cathode performance, and as a bridge between coin-cell and multi-layer testing. Best for cathode-focused electrochemistry.
07 / Pricing MatrixComplete Pricing Matrix — All 7 Sodium-Ion Pouch Cell SKUs
Every Xnergy sodium-ion dry pouch cell SKU, organized by cathode chemistry. All prices in USD per cell, shipped within one week of order confirmation. Bulk pricing available — see the next section for ordering 10+ cells.
| Configuration | Specification | Price (USD) |
|---|---|---|
| NFPP / Hard Carbon (Polyanionic) | ||
| NFPP / Hard Carbon | 1 Ah | $89 |
| NFPP / Anode-Free | ||
| NFPP / Anode-Free | 1 Ah | $102 |
| NVP / Hard Carbon (NASICON) | ||
| NVP / Hard Carbon | 1 Ah | $102 |
| NVP / Hard Carbon | 2 Ah | $140 |
| NVP / Anode-Free | ||
| NVP / Anode-Free | 1 Ah | $102 |
| P2 Layered Oxide / Hard Carbon | ||
| P2 Oxide / Hard Carbon | 1 Ah | $89 |
| P2 Oxide / Hard Carbon | 1.5 Ah | $102 |
| Sodium Metal Single-Layer (Unfilled) | ||
| NFPP / Sodium Metal | Single-Layer | $419 |
| NVP / Sodium Metal | Single-Layer | $419 |
| P2 Oxide / Sodium Metal | Single-Layer | $419 |
08 / Bulk OrdersBulk Pricing & Custom Sodium-Ion Cell Configurations
Sodium-ion research groups running multi-month cycling studies, comparative chemistry programs, or early-stage pilot work typically order cells in batches of 10 to 100+ units. Xnergy Materials offers bulk-purchase pricing on all seven sodium-ion SKUs for orders of 10 cells or more, with tiered discounts depending on chemistry, capacity, and total order value.
Ordering 10+ sodium-ion cells? Contact us for bulk pricing.
Bulk discounts available on every SKU in the catalog for orders of 10 cells or more. Specific discount rates depend on chemistry and total order value — contact our sales team with your requirements for a custom quote. Ongoing supply agreements and pilot-scale partnerships also available for research programs needing recurring shipments.
Contact us for bulk quote →Beyond the seven standard SKUs, Xnergy offers custom sodium-ion dry pouch cell configurations — specific capacities outside the standard range, non-standard dimensions, alternate electrode loadings, custom layer counts, or specific tab arrangements. Custom orders typically require 4–6 weeks lead time from specification confirmation. Contact us with your target specifications for a custom quote.
Running a sodium-ion comparative study? We assemble matched-architecture kits across NFPP, NVP, and P2 layered oxide — same anode, same packaging, same handling protocols — so you can isolate cathode contribution to performance with clean baseline data. Request a comparative kit quote.
09 / FAQSodium-Ion Dry Pouch Cells: Frequently Asked Questions
A sodium-ion dry pouch cell — also called an unfilled sodium-ion pouch cell — is a pouch-format Na-ion cell manufactured and sealed without electrolyte. The cathode (NFPP, NVP, or P2 oxide), anode (hard carbon, anode-free, or sodium metal), separator, and current collectors are pre-assembled inside the aluminum-laminated pouch, but the electrolyte-injection step is left to the researcher. This format lets sodium-ion battery research groups study their own custom electrolytes — sodium-salt liquid systems, polymer electrolytes, or hybrid formulations — in a professionally manufactured cell platform.
Sodium-ion researchers studying new electrolytes need a clean, factory-assembled cell without any pre-injected liquid. Unfilled pouch cells let you inject your own formulation — sodium-salt liquid, polymer, gel, or hybrid — without worrying about residual solvent contamination from a supplier's standard electrolyte. This is essential for electrolyte-additive studies, sodium-salt screening programs, and any research where the electrolyte is the experimental variable.
Each cathode targets a different research path:
- NFPP — Na4Fe3(PO4)2(P2O7) — best for safety, long cycle life, and lowest cost. The recommended starting point for groups new to sodium-ion research.
- NVP — Na3V2(PO4)3 — highest operating voltage at 3.4V flat plateau. Best for high-power and rate-capability research, fast-charge studies, and reference electrochemistry at elevated voltages.
- P2 layered oxide — highest energy density (160–180 mAh/g, 3.5–4.0V). Best for energy-density characterization, structural studies, transition metal substitution research, and Li-ion comparative studies.
Hard carbon is the commercial standard with 300–350 mAh/g reversible capacity through intercalation and pore-filling — choose this for realistic full-cell performance data. Anode-free cells ship with bare current collectors, plating sodium directly during first charge for maximum theoretical energy density — the platform for studying plating-stripping morphology and SEI formation. Sodium metal anodes in single-layer pouch format serve as half-cell-equivalent reference platforms for direct cathode benchmarking.
NFPP stands for sodium iron pyrophosphate phosphate — Na4Fe3(PO4)2(P2O7) — a polyanionic cathode for sodium-ion batteries. Its robust phosphate framework resists structural collapse during sodium extraction, making it the safest mainstream sodium-ion cathode. Operating voltage ~3.0–3.2 V vs Na/Na+ with ~129 mAh/g theoretical capacity. The iron-based composition makes NFPP the most cost-favorable option for scale-up studies.
NVP — Na3V2(PO4)3 — is a NASICON-structured polyanionic cathode delivering the highest operating voltage among commercialized sodium-ion cathodes (~3.4 V flat plateau vs Na/Na+). The NASICON crystal structure provides three-dimensional sodium-ion diffusion pathways enabling superior rate capability. Theoretical specific capacity ~117 mAh/g. NVP's flat discharge plateau makes it valuable for precise SOC tracking and impedance studies.
P2-type layered oxide cathodes — P2-Nax(TM)O2 where TM = Mn, Ni, Fe, or combinations — offer the highest energy density of any commercially available sodium-ion cathode (160–180 mAh/g, 3.5–4.0 V vs Na/Na+). The P2 structure has sodium occupying prismatic sites between transition metal layers, enabling faster ion transport than O3-type counterparts. This is the closest sodium-ion analog to NCM-style layered cathodes in lithium-ion.
An anode-free sodium-ion pouch cell has no pre-deposited anode material — just a bare current collector where the anode would normally be. During the first charge, sodium from the cathode plates directly onto the collector, forming a thin sodium metal anode in-situ. This approach maximizes energy density (no inactive anode mass) and simplifies cell manufacturing, but is technically demanding because of dendrite and coulombic-efficiency challenges. Xnergy supplies anode-free cells with both NFPP and NVP cathodes for researchers pushing this frontier.
Yes. All sodium-ion dry pouch cells listed in the Xnergy catalog are in stock and ship within one week of order confirmation. Bulk orders of 10 cells or more, or custom configurations, may extend lead time to 2–4 weeks. Contact us for expedited shipping options on urgent orders.
Yes. Xnergy Materials offers bulk-purchase pricing for sodium-ion dry pouch cell orders of 10 cells or more. Discount tiers vary by chemistry and capacity. Contact us for a custom quote on large orders or ongoing supply agreements. Research programs requiring recurring shipments may also qualify for pilot-partnership pricing.
Yes. Beyond the seven standard SKUs, Xnergy offers custom sodium-ion dry pouch cell configurations including specific capacities, dimensions, electrode loadings, layer counts, and tab arrangements. Custom orders typically require 4–6 weeks lead time. Contact us with your target specifications for a custom quote.
Seven sodium-ion dry pouch cell SKUs. Three cathode chemistries. In stock. One click away.
Browse the full sodium-ion dry pouch cell catalog to compare specifications, order direct, or request a custom configuration. In-stock items ship within one week of order confirmation.