SI-C/GRAPHITE COMPOSITE SINGLE-SIDED ANODE SHEET
This single-sided Si-C/graphite composite anode sheet is designed for lithium-ion battery R&D using a 1100 mAh/g composite active-material capacity grade and a customizable areal-loading target within 4-6 mg/cm2 per side. It is intended for high-capacity anode evaluation, electrolyte screening, and early-stage full-cell matching when the project requires a controlled loading target within this range.
For upstream powder selection, see Atomfair lithium-ion anode materials. For projects requiring a different Si-C/graphite blend, coating side, current collector, sheet size, roll format, or customer-defined formulation, review Atomfair custom battery electrode coating service.
| Product Specification | Value |
|---|---|
| Product Type | Si-C/graphite composite single-sided anode electrode sheet for lithium-ion battery research |
| Active Material System | Si-C / graphite composite active material |
| Composite Specific Capacity | 1100 mAh/g, based on active material mass |
| Coating Loading | 4-6 mg/cm2 per side; final loading target confirmed by RFQ |
| Coating Side | Single-sided |
| Formula | Atomfair mature Si-C/graphite formulation or customer-supplied formulation; active-material ratio confirmed per RFQ |
| Current Collector | Carbon-coated copper foil as standard; bare copper foil or other collector options can be reviewed by RFQ |
| Current Collector Structure | 1 µm carbon coating / 6 µm copper foil / 1 µm carbon coating |
| Coating Area | Custom sheet size, pre-cut format, or roll/sheet format by RFQ |
| Coating Process | Wet process, unless otherwise specified during project confirmation |
| Pack Size | Confirmed according to sheet size, quantity, and packaging requirement |
Material Architecture and Capacity Basis
This electrode uses a Si-C/graphite composite design. The listed 1100 mAh/g value is the capacity grade for the composite active material used in the electrode formulation; it is not a pure silicon-carbon material label.
The 4-6 mg/cm2 value is the supported customization window for the areal-loading target. The final coating loading should be confirmed during RFQ according to the customer’s cell design, electrode size, formulation, and testing plan.
Electrode Loading and Areal Capacity
Areal capacity is often more useful than gravimetric capacity alone because it connects active-material capacity to cell balancing. For this RFQ product, the theoretical areal capacity should be calculated from the confirmed loading target, confirmed active-material ratio, and 1100 mAh/g composite active-material capacity.
Current Collector Design
The standard configuration uses carbon-coated copper foil for silicon-containing composite anodes. Compared with bare copper foil, carbon-coated copper foil can improve interfacial contact between the anode coating and current collector, which is especially relevant for Si-C/graphite electrodes.
Bare copper foil or alternative current collector structures can be reviewed when required by the customer’s existing cell design, control experiment, or supplied electrode formulation.
| Research Use Case | What This Product Helps Evaluate |
|---|---|
| High-capacity anode evaluation | Studies of Si-C/graphite composite anodes with higher capacity than standard graphite electrodes. |
| Electrolyte and additive screening | Comparison of electrolyte systems under silicon-containing anode conditions, including SEI formation behavior and first-cycle efficiency sensitivity. |
| Loading-window comparison | Evaluation of project-specific loading targets within the 4-6 mg/cm2 per-side customization window before moving to higher loading designs. |
| Full-cell matching | Early-stage N/P balancing and cathode loading matching for lithium-ion full-cell experiments. |
| Customizable Item | Available Direction |
|---|---|
| Sheet Size | Custom sheet size, punched disc, sheet format, or roll format |
| Formula | Based on Atomfair mature formulation or customer-supplied formulation |
| Current Collector | Carbon-coated copper foil as standard; other collector options by RFQ |
| Packaging | Sheet count, dry packaging, vacuum packaging, or inert-gas packaging by RFQ |
Handling, Storage and Pre-Use Treatment
- Use a dry handling environment before cell assembly to reduce moisture exposure on the coated electrode surface.
- Store opened sheets in a dry environment or inert atmosphere to reduce moisture exposure before use.
- Avoid touching, bending, scratching, or contaminating the coated surface during punching, transfer, and stacking.
- For coin-cell testing, determine active material mass from the confirmed loading target, active-material ratio, and punched electrode area.
| Research Need | Related Atomfair Category | Best For |
|---|---|---|
| Start from active material selection | Lithium-Ion Anode Materials | Selecting Si-C/graphite powders before coated-electrode testing. |
| Compare ready-to-use anode sheets | Lithium-Ion Anode Electrode Sheets | Comparing graphite, Si/C, wet-process, dry-process, single-sided, and double-sided sheets. |
| Match a cathode for full-cell work | Lithium-Ion Cathode Electrode Sheets | Lithium-ion full-cell balancing and N/P ratio design. |
| Build a pouch-cell research platform | Lithium-Ion Dry Pouch Cells | Electrolyte filling, formation studies, and early full-cell evaluation. |
| Change the electrode specification | Custom Battery Electrode Coating Service | Custom loading, coating area, collector, formulation, and roll or sheet format. |
| Plan the wider battery R&D workflow | Battery Research Materials, Cells & Diagnostics Guide | Connecting materials, electrode sheets, cells, testing, and diagnostics. |
Tailored Solutions for Research
Contact our engineering team for technical support or institutional quotation requests.
This electrode sheet requires dry handling and inert atmosphere storage to prevent moisture-induced degradation. The final coating loading and active-material ratio must be confirmed via RFQ to ensure compatibility with the intended cell design.
- Dry Handling Requirement: Use a dry handling environment before cell assembly to reduce moisture exposure on the coated electrode surface.
- Storage Atmosphere Requirement: Store opened sheets in a dry environment or inert atmosphere to reduce moisture exposure before use.
- Mechanical Handling Constraint: Avoid touching, bending, scratching, or contaminating the coated surface during punching, transfer, and stacking.
- Loading Confirmation Requirement: The final coating loading must be confirmed during RFQ according to the customer's cell design, electrode size, formulation, and testing plan.
- Current Collector Compatibility: Carbon-coated copper foil is the standard current collector; bare copper foil or other options should be reviewed by RFQ for compatibility.
This procedure outlines the necessary steps for handling, storing, and preparing the electrode sheet for cell assembly. Adhering to these steps ensures electrode integrity and reliable electrochemical testing.
- Confirm Loading Parameters
Confirm the final coating loading and active-material ratio with the supplier via RFQ before initiating experiments. - Store in Dry or Inert Atmosphere
Store opened electrode sheets in a dry environment or inert atmosphere to minimize moisture exposure. - Handle with Care
Handle the sheets by the edges only to avoid touching, bending, scratching, or contaminating the coated surface. - Calculate Active Material Mass
Calculate the active material mass from the confirmed loading target, active-material ratio, and punched electrode area for coin-cell testing.
How is the theoretical areal capacity calculated for this Si-C/graphite composite anode sheet given the 4-6 mg/cm2 loading window and 1100 mAh/g composite specific capacity?
The theoretical areal capacity is calculated from the confirmed loading target, confirmed active-material ratio, and the 1100 mAh/g composite active-material capacity. For example, using a 5.0 mg/cm2 loading target and a 90.30% active material reference, the result is approximately 5.0 mAh/cm2. The final loading target must be confirmed by RFQ according to the customer's cell design, electrode size, formulation, and testing plan.
Why does this electrode use carbon-coated copper foil as the standard current collector, and what are the implications for Si-C/graphite anode integration?
The carbon-coated copper foil improves interfacial contact between the anode coating and the current collector, which is especially relevant for Si-C/graphite electrodes due to volume changes during cycling and adhesion requirements. Bare copper foil or alternative current collector structures can be reviewed by RFQ if the customer's existing cell design, control experiment, or supplied formulation requires it.
What handling and storage conditions are required to maintain the integrity of this single-sided Si-C/graphite anode sheet before cell assembly?
Use a dry handling environment before cell assembly to reduce moisture exposure on the coated electrode surface. Store opened sheets in a dry environment or inert atmosphere to minimize moisture uptake. Avoid touching, bending, scratching, or contaminating the coated surface during punching, transfer, and stacking. For coin-cell testing, active material mass is determined from the confirmed loading target, active-material ratio, and punched electrode area.
This Si-C/graphite composite single-sided anode sheet, rated at 1100 mAh/g composite active-material capacity with a customizable areal loading of 4–6 mg/cm², is engineered for high-capacity anode evaluation, electrolyte screening, and early-stage full-cell matching in lithium-ion battery R&D; its carbon-coated copper collector improves interfacial contact for silicon-containing anodes, though the wet-process coating and limited loading window impose drying and infrastructure constraints.
Positive
- High-capacity composite anode design: The 1100 mAh/g composite active-material capacity provides significantly higher specific capacity than standard graphite anodes, enabling evaluation of next-generation anode materials for increased energy density.
- Carbon-coated copper foil improves contact: The standard carbon-coated copper current collector (1 µm carbon / 6 µm Cu / 1 µm carbon) enhances interfacial adhesion with the Si-C/graphite coating, reducing delamination risk and improving cycle stability in silicon-containing electrodes.
Trade-offs
- Customizable loading requires early confirmation: The areal loading target (4–6 mg/cm² per side) must be confirmed by RFQ, and the final capacity must be calculated from the confirmed loading, active-material ratio, and 1100 mAh/g grade, adding a pre-order design step.
- Wet-process coating demands dry handling: The wet-process coating requires strict dry-environment handling and storage before cell assembly to minimize moisture exposure, and the opened sheets must be kept in inert atmospheres to avoid degradation.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
