Revolutionize Your Battery Innovations

Explore the Possibilities with NEI’s Electrochemical Testing Services

How is NEI Different?

We take a Whole-of-Cell Approach to Testing New Materials

This means we take into account all parts of a cell, so the results are more meaningful, relevant, and applicable to real world applications. For example, if you have a new anode material, we will fabricate cells where the anode powder has been processed to mimic commercial anode electrodes and then subject it to meaningful test protocols.

We have an Extensive Materials Background

Our staff’s extensive materials background allows us to shed light on the interactions within the cell at the molecular level, which is immensely helpful in optimizing new materials and making them commercially relevant.

We Bridge the Commercialization Gap

Our material-centric approach to electrochemistry bridges the commercialization gap faster, better, and at lower cost than our competition.

What you can Expect from NEI

Optimize Performance

Gain valuable insight into your battery material’s performance and pave the way for targeted improvements.

Cost Effective Solutions

Discover how our comprehensive testing services can save you time and money without compromising quality.

Efficient Turnarounds

We will work closely with you to establish a timeline to help meet your goals and milestones in a timely manner.

Explore Our Services

Docs Docs Electrode Fabrication Database Database Cell Assembly Battery Battery Cell-Level Testing Chart-line Chart-line Supported Chemistries Mail Mail Request Consultation
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Electrode Fabrication Services

NEI provides custom electrode casting and slurry development services tailored to your specific active materials, mass loadings, and cell architectures. Electrode sheets can be fabricated using customer-supplied powders or selected from NEI’s commercial catalog of cathode and anode materials for Lithium-ion and Sodium-ion battery systems. We produce high-quality, reproducible cathode and anode sheets on a wide range of current collectors for coin cells, pouch cells, or standalone testing applications.

Customization Options

  • Active Material Loading

    Specify the active loading (mg/cm2) per side

  • Areal Capacity

    Specify the areal capacity (mAh/cm2) per side

  • Electrode Composition

    Modify the ratio of active material, conductive carbon, and binder

  • Binder Type

    Aqueous (CMC/SBR), Non-aqueous (PVDF)

  • Current Collector

    Aluminum, Copper, Carbon paper, Graphite foil, Titanium, or Stainless steel

  • Matching

    Anodes can be matched to cathodes at your specified N/P ratio

  • Size / Format (Standalone)

    Modify the dimentions of sheets or rolls

  • Uncoated Tab Areas

    Specify the uncoated areas along the length

Custom Cell Assembly Capabilities

NEI provides custom coin cell and pouch cell assembly services tailored to battery material researchers and developers. Assembled under controlled inert environments to ensure material integrity for accurate electrochemical evaluation, our cell builds accommodate diverse chemistries—including Li-ion, Na-ion, Li & Na metal, Li-S, Solid-State, Aqueous systems, and Supercapacitors—to deliver reproducible, high-quality cells for your R&D objectives.

  • Coin Cell Assembly (CR2025 & CR2032)

    • Choose from half-cell (lithium or sodium metal counter electrodes) or balanced full-cell builds
    • Integration of custom liquid, gel polymer, or solid-state electrolytes and functional separators

  • Material & Sourcing Options

    • Assembly utilizing client-supplied active powders, pre-cast electrode sheets, novel additives, or functional separators
    • Option to pair customer samples with NEI’s inventory of cathode/anode materials, solid electrolytes, and specialty components

  • Prototype Pouch Cell Assembly (0.1 Ah to 4 Ah)

    • Sheet dimensions from 5 cm × 5 cm up to 11.6 cm × 7.6 cm
    • Single-layer, Z-stack multilayer, and jelly-roll configurations
    • Ultrasonic tab welding, aluminum-laminated pouch vacuum sealing, and optional build without electrolyte injection for dry shipment

  • Logistics & Downstream Options

    • Direct shipment to customer facilities or designated third-party testing laboratories
    • Immediate transfer into NEI’s cell-level testing and characterization program

Cell-Level Testing & Characterization

From fundamental material screening to advanced failure analysis, NEI delivers actionable electrochemical data to evaluate cell performance, kinetic limits, and degradation mechanisms. Our testing laboratory supports both NEI-assembled and customer-supplied coin and pouch cells, executing tailored protocols across wide temperature ranges to accelerate your cell engineering and material optimization.

  • Electrochemical Cycling & Rate Capability

    • Capacity & Life-Cycle Tracking: Long-term galvanostatic cycling, capacity retention profiling, and material-level specific capacity measurements
    • C-Rate Evaluation: Charge and discharge rate capability testing across varied current densities
    • Resistance & Power Profiling: Direct current internal resistance (DCIR) tracking, Hybrid Pulse Power Characterization (HPPC), and cell-level energy/power density metrics

  • Wide-Temperature & Environmental Cycling

    • Thermal Range Testing: Controlled environmental chamber cycling from -40 deg C to > 90 deg C
    • Extreme Condition Evaluation: Performance profiling, thermal stability tracking, and temperature-dependent impedance monitoring

  • Advanced Electrochemical Diagnostics

    • Electrochemical Impedance Spectroscopy (EIS): In-situ impedance profiling to decouple ohmic resistance, charge-transfer resistance, and SEI layer growth
    • Cyclic Voltammetry (CV): Redox couple identification, phase transition tracking, and electrochemical stability window determination
    • Transport & Kinetic Properties: Temperature-dependent ionic conductivity, transference number determination, and electronic/ionic electrode resistance analysis

  • Post-Mortem & Structural Failure Analysis

    • Glovebox Teardown: Controlled cell disassembly in an inert atmosphere to evaluate cycled component degradation
    • Interfacial Diagnostics: Visual inspection, electrode harvesting, and SEM/EDS imaging to analyze lithium/sodium plating, active material loss, and structural failure

Supported Chemistries & Capabilities

NEI’s cell fabrication and testing capabilities span a comprehensive spectrum of energy storage chemistries, cell architectures, and component R&D. We support researchers across emerging and commercial platforms, providing tailored cell builds and diagnostics across coin cell and pouch cell form factors.

  • Lithium-ion & Lithium Metal Chemistries

    • Cell Formats: Coin cells (CR2025, CR2032) and pouch cells (0.1 Ah to 4 Ah) in half-cell or full-cell configurations
    • Li-ion Cathodes: NMC, LFP, NCA, LMNO, high-entropy oxides, and custom high-voltage oxide formulations
    • Li-ion Anodes: Graphite, silicon/SiOx composites, LTO, hard carbon, and novel anode formulations
    • Lithium Metal Anodes: Bare, surface-passivated, or protective-coated metallic lithium foils

  • Sodium-ion & Sodium Metal Chemistries

    • Na-ion Configurations: Half cells and balanced full cells in coin and pouch formats
    • Na-ion Cathodes: Layered transition metal oxides (e.g., Na0.44MnO2), Prussian blue analogues, and polyanion compounds
    • Na-ion Anodes: Hard carbon, alloy-based anodes, and metallic sodium

  • Next-Generation Systems & Specialty Chemistries

    • Solid-State & Gel Polymer Electrolytes: Sulfide, oxide, and polymer matrix solid electrolytes
    • Alternative Chemistries: Lithium-sulfur (Li-S), ionic liquid systems, and organic electrolyte formulations
    • Aqueous & Multivalent Systems: Water-in-salt electrolytes, aqueous sodium-ion, supercapacitors, and alternative cation chemistries (magnesium, zinc, iron, hydrogen)

  • Cell Component & Inactive Material Evaluation

    • Separators: Standard polyolefin, glass fiber, ceramic-coated, and functional separators
    • Conductive Additives & Binders: Carbon black, CNTs, graphene dispersions, standard binders (PVDF, CMC/SBR), and novel fluorinated or aqueous binders
    • Current Collectors: Aluminum, copper, carbon-coated foils, and porous conductive substrates (e.g., carbon paper)

Request a Free Consultation

Send us your Request

  1. Submit Your Project Details: Complete the inquiry form below with information regarding your material(s) and testing requirements.
  2. Technical Review: One of our battery materials specialists will review your specifications and follow up to discuss formulation details or test protocols.
  3. Receive a Customized Proposal: We will provide a tailored quote and estimated turnaround schedule for your project.

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