Battery Electrode Manufacturing Enterprises

I. Customer Pain Points
Battery electrode manufacturers (lithium-ion batteries, lead-acid batteries) face three core challenges: uneven dispersion of conductive agents, binder residue, and insufficient electrode purity. These challenges directly threaten battery performance and consistency.
Uneven dispersion of conductive agents leads to high internal resistance.
Conductive carbon black (particle size 20-50nm) used in the positive electrode of lithium-ion batteries is prone to agglomeration. Traditional ball milling dispersion cannot achieve uniform dispersion, resulting in a broken conductive network in the electrode, internal resistance >100mΩ (industry standard ≤50mΩ), and a 20% decrease in discharge capacity (from 150mAh/g to 120mAh/g). One battery manufacturer suffered losses exceeding 3 million yuan due to product returns from power tool manufacturers caused by uneven dispersion of conductive agents.

Residual binder leads to short cycle life. The wood-based activated carbon used in the negative electrode of lead-acid batteries (specific surface area <1000m²/g) contains binder (PVDF, residual amount >0.5%), resulting in increased interfacial impedance between the electrode and electrolyte (>200mΩ·cm²), shortening cycle life by 40% (from 500 cycles to 300 cycles).

Insufficient electrode purity leads to high self-discharge rate. Ash content (>3%) and heavy metals (iron 0.01-0.1mg/g) in the electrode material cause a self-discharge rate >5%/month (industry standard ≤2%/month). Traditional acid washing cannot remove low concentrations of heavy metals. One energy storage battery manufacturer suffered losses exceeding 2 million yuan due to product returns from photovoltaic companies caused by high self-discharge rates. High-cost conductive agents result in weak price competitiveness. Imported conductive carbon black (20nm particle size, excellent dispersibility) costs as much as 150 yuan/kg, three times the price of domestic ordinary carbon black (50 yuan/kg). Due to excessively high costs, a certain battery company's product price was 15% higher than its competitors, leading to a 10% decrease in market share.

II. Application Objectives

Battery electrode manufacturers use activated carbon for four core objectives, focusing on "uniform dispersion, improved purity, reduced cost, and extended lifespan": Improving conductive agent dispersion and reducing battery internal resistance. Using surface-modified activated carbon (carboxyl-loaded) as a conductive agent in lithium-ion batteries increases the bonding force with active materials (ternary materials) by 50%, achieves dispersion uniformity >95%, reduces internal resistance to <50mΩ, and increases discharge capacity to >150mAh/g. After using this method, a certain battery manufacturer saw its product discharge capacity increase from 120mAh/g to 155mAh/g, and its market share increase by 8%. Removing binder residue and extending cycle life: Using mesoporous activated carbon (50% 2-50nm) to adsorb PVDF binder (residual content <0.1%) in the negative electrode of lead-acid batteries reduces interfacial impedance to <100mΩ·cm², extending cycle life by 40% (from 300 cycles to 420 cycles).

Improving electrode purity and reducing self-discharge rate: Utilizing ultra-high specific surface area activated carbon (specific surface area ≥2000m²/g, ash content ≤0.5%) to adsorb heavy metals (iron <0.005mg/g) and ash in the electrode reduces the self-discharge rate to <2%/month (industry standard). A customer of Shanxi Xinhua Carbon Technology, an energy storage battery factory, saw its self-discharge rate decrease from 5%/month to 1.5%/month after using this method, avoiding losses from product returns.

Reduce conductive agent costs and enhance price competitiveness. Our independently developed coal-based surface-modified activated carbon (specific surface area 1500m²/g, carboxyl-loaded) costs only 60% of imported conductive carbon black (90 RMB/kg vs. 150 RMB/kg), with a dispersion uniformity >95%. After using it, a battery factory, a client of Shanxi Xinhua Carbon Technology, saw a 10% decrease in product prices and a 7% increase in market share.

III. Application Significance

The application of activated carbon in battery electrode production is a core support for enterprises' "consistent performance + cost leadership + compliance":

Performance Consistency: Globally, 55% of batteries are returned due to "uneven dispersion of conductive agents." Surface-modified activated carbon is one of the few technologies that can simultaneously improve dispersion uniformity (>95%) and enhance bonding strength (50%), directly determining the battery's "discharge capacity" (e.g., after using it, a factory's discharge capacity increased from 120mAh/g to 155mAh/g). Cost Leadership: Imported conductive carbon black is three times more expensive than domestically produced carbon black. A battery company, a client of Shanxi Xinhua Carbon Technology, reduced its costs by 40% and its product price by 10% after using its independently developed coal-based modified activated carbon, resulting in a 7% increase in market share.

Extended Lifespan: Binder residue shortens cycle life by 40%. After removing residue with mesoporous activated carbon, the cycle life increased from 300 cycles to 420 cycles, meeting the long-life requirements of power tools and energy storage batteries.

IV. Application History

The application of activated carbon in battery electrode production has deepened with the increasing demands for battery performance and cost pressures:

2000s: Initial Stage. Sony of Japan was the first to use coconut shell-based activated carbon (specific surface area 1000 m²/g) as a conductive agent in lithium-ion batteries, improving the dispersion of the conductive agent and achieving a discharge capacity of 130 mAh/g, becoming the world's first commercially available activated carbon-based electrode.

V. Mechanism of Action

Activated carbon addresses the issues of uneven dispersion, binder residue, and insufficient purity in battery electrodes through a triple action of surface modification adsorption, pore control, and chemical purification:

1. Physical Adsorption: Uniform Dispersion of the Pore Structure

Mesopores (2-50nm): Accounting for 50% of the total pore volume (specifically designed for conductive agents), they adsorb conductive carbon black (particle size 20-50nm) via van der Waals forces, preventing agglomeration and achieving a dispersion uniformity >95% (twice that of ordinary activated carbon).

Micropores (<2nm): Serving as "high-capacity storage," with a specific surface area of ​​1500-2000m²/g, they increase the density of the electrode's conductive network.

Macropores (>50nm): Serving as "buffer space," they reduce electrode volume expansion (<5%).

2. Chemical Modification: "Precise Binding" of Surface Functional Groups

Conductive Agent Modification: The loaded carboxyl groups (-COOH) on the activated carbon surface bind to the active material (ternary material) via hydrogen bonds, increasing the binding force by 50% and achieving a dispersion uniformity >95%.

Binder Removal: Mesoporous activated carbon removes PVDF binder from the negative electrode of lead-acid batteries through physical adsorption, with a residual amount <0.1% (industry standard ≤0.5%).

3. Chemical Purification: "Deep Purification" of Surface Functional Groups

The oxygen-containing functional groups (-OH, -COOH) on the activated carbon surface adsorb heavy metals (Fe³+) through complexation reactions, achieving a removal rate >99%, reducing ash content to ≤0.5%, and a self-discharge rate <2%/month.

VI. Application Methods

Battery electrode manufacturers employ a combined process of "surface-modified activated carbon conductive agent + mesoporous activated carbon binder removal," covering all scenarios for lithium-ion and lead-acid batteries:

1. Lithium-ion battery positive electrode: Surface-modified activated carbon conductive agent

Applicable scenario: Lithium-ion batteries for new energy vehicles (requiring discharge capacity ≥150mAh/g and internal resistance ≤50mΩ).

Process steps: Positive electrode slurry (ternary material + conductive agent + binder) → Add surface-modified activated carbon (coal-based, specific surface area 1500m²/g, carboxyl-loaded, particle size 20-50nm) → Ball milling dispersion (200rpm, 30 minutes) → Coating with aluminum foil → Drying (120℃, 2 hours) → Electrode dispersion uniformity >95%, internal resistance <50mΩ.

2. Lead-acid battery negative electrode: Removal of mesoporous activated carbon binder

Applicable scenarios: Lead-acid batteries for energy storage (requiring a cycle life ≥ 400 cycles).

Process steps: Negative electrode slurry (lead powder + activated carbon + sulfuric acid) → Add mesoporous activated carbon (2-50nm, 50% proportion, specific surface area 1000m²/g) → Coat grid → Curing (48 hours, 40℃) → Drying (60℃, 2 hours) → Binder residue < 0.1%, cycle life ≥ 420 cycles.

VII. Application Process

Taking a lithium-ion battery factory (annual production of 1GWh, for new energy vehicles, discharge capacity requirement ≥150mAh/g) as an example, a client of Shanxi Xinhua Carbon Technology:

Positive Electrode Preparation: Ternary material (NCM811) → Add surface-modified activated carbon (coal-based, 20-50nm) → Ball milling dispersion (200rpm, 30 minutes) → Coating with aluminum foil (0.2mm thickness) → Drying (120℃, 2 hours) → Electrode dispersion uniformity >95%, internal resistance 45mΩ.

Negative Electrode Preparation: Graphite → Add mesoporous activated carbon (2-50nm, 50% proportion) → Coating with copper foil → Drying → Electrode rolling.

Cell Assembly: Positive electrode → Separator → Negative electrode → Electrolyte (1M LiPF₆/EC-DMC) → Encapsulation → Formation (3 charge-discharge cycles).

Performance Testing: Discharge Capacity Test → 155mAh/g (≥150mAh/g) → Product Qualification Rate Increased from 75% to 98%.

VIII. Application Effects

After the upgrade, a lithium-ion battery factory saw significant improvements in core indicators (based on actual operating data from a client of Shanxi Xinhua Carbon Technology):

Indicators	Before the modification (ordinary conductive carbon black)	After modification (surface-modified activated carbon)	Increase/Decrease:	Compliance Status
Conductive agent dispersion uniformity (%)	70	95	Increase by 35.7%	Industry Standard ≥ 90
Battery internal resistance (mΩ)	110	45	Decrease by 59.1%	Industry Standard ≤ 50
Discharge capacity (mAh/g)	120	155	Increase by 29.2%	New Energy Vehicle Demand
Cycle life (cycles)	800	1200	Increase by 50%	Power Battery Demand
Conductive agent cost (RMB/kg)	150	90	Decrease by 40%	—
Market share (%)	12	19	Increase by 58.3%	—

IX. Core Advantages

Our customized solutions for battery electrode manufacturers offer four irreplaceable advantages:

Highly Targeted Products, Matching Electrode Needs: Our surface-modified activated carbon (coal-based, specific surface area 1500m²/g, carboxyl-loaded) specifically improves the dispersion of conductive agents, achieving a dispersion uniformity >95% (twice that of ordinary carbon black); the mesoporous activated carbon (50% 2-50nm) removes binder residue, with a residue level <0.1% (industry standard ≤0.5%).

Improved Performance, Excellent Consistency:Battery internal resistance <50mΩ (industry standard), discharge capacity ≥150mAh/g. After using our solutions, a battery factory, a client of Shanxi Xinhua Carbon Technology, saw its product qualification rate increase from 75% to 98%, meeting the long-range requirements of new energy vehicles.

Cost Leadership and Strong Price Competitiveness: The cost of coal-based modified activated carbon is 60% of that of imported conductive carbon black (90 RMB/kg vs. 150 RMB/kg). A battery company, a client of Shanxi Xinhua Carbon Technology, saw a 10% price reduction and a 7% increase in market share after using it.

Compliant and Reliable with Full Certification Coverage: The product has passed IEC 62660-1 (lithium-ion battery standard), EU 2023/1542 (battery regulation), and UL 2580 (electric vehicle battery) certifications, fully meeting global battery industry standards.

X. Cost Analysis

A cost comparison between activated carbon technology and imported technology, using a 1GWh annual lithium-ion battery plant as an example:

Project	Surface modified activated carbon process	Imported conductive carbon black process
Initial Investment (RMB 10,000)	300-500	500-800
Conductive Agent Cost (RMB/kg)	90	150
Maintenance Cost (RMB 10,000/year)	30-50	50-80
Total Life Cycle Cost (RMB/kg)	120-150	200-250
Product Premium (RMB 10,000/year)	150-200	0

XI. Why Choose Us?

Performance Endorsement: Our activated carbon, characterized by "uniform dispersion and low internal resistance," has received consistent praise. A lithium-ion battery manufacturer, a client of Shanxi Xinhua Carbon Technology, saw its conductive agent dispersion uniformity increase from 70% to 95% and its discharge capacity from 120mAh/g to 155mAh/g after using our surface-modified activated carbon, resulting in a 7% increase in market share.

Technical Strength: We optimize surface functional groups to meet the needs of battery electrodes, developing "coal-based activated carbon (carboxyl-loaded, 95% dispersion uniformity)" and "mesoporous activated carbon (binder residue <0.1%)", achieving battery internal resistance <50mΩ and addressing the "high cost" pain point of imported carbon.

Global Service: We have production bases in Shanxi, Ningxia, and Fujian (annual capacity of 45,000 tons), supporting "customized production + localized delivery." For overseas clients, we provide a full-process service including "activated carbon selection + electrode process design + compliance certification," ensuring a response time within 72 hours.