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Overview of Primer Coating Agents for Secondary Battery Current Collectors

Why Current Collector Primer Coating Agents Are Needed

Why Current Collector Primer Coating Agents Are Needed

  • Improvement needed to address the peeling of active material from the current collector due to the contraction/expansion of the electrode active material in charging/discharging of secondary batteries
  • Improvement needed to reduce the interfacial resistance between the current collector and the electrode active material for the rapid charge/discharge
  • Need to prevent the corrosion of Al, Cu current collectors by the electrode active material
  • Need to prevent corrosion of Al, Cu current collectors by the electrolyte

Primer Coating Layer Design

Primer Coating Layer Design

ENtier Product Properties

Item Unit Value
Apparency - Black / Gray
Viscosity1) cPs 20 ~ 400 (Customizable)
Surface resistance22) Ω Comparable to the resistance level of reference Al or Cu foil
Solid content3) % 6 ~ 16 (Customizable)
Surface tension mN/m 20 ~ 40 (Customizable)
pH - 5 ~ 9 (Customizable)
Density g/cm3 1.00 ± 0.1

1) Brookfield Viscometer (Spindle #63, 100rpm)

2) Mitsubishi MCP-T710

3) 150℃ for 1hrs

Primer Coating Agents for Secondary Battery Current Collectors


Primer Coating Agents for Secondary Battery Current Collectors
Applications of Current Collector Coating Agents
  • Secondary batteries using LFP cathodes and silicon anodes
  • Dry electrodes
  • Semi-solid-state and solid-state secondary batteries
  • Sodium-ion batteries
Solutions by Coating Layer Thickness and Properties
  • Conductive materials: Carbon black, CNT, graphene, and hybrid formulations are all available
  • Everchemtech’s coating agents for current collectors enable coating on aluminum current collectors used for cathodes without removing surface rolling oil, allowing application to unwashed foil
  • Everchemtech’s coating agents for current collectors help improve adhesion between copper foil used as an anode current collector and anode active materials during high-rate charge/discharge, while reducing interfacial resistance
Improved Production Yield
  • Everchemtech’s coating agents for current collectors can be applied to unwashed aluminum current collector foil, eliminating the need for a cleaning process during electrode manufacturing. This helps reduce processing costs and increase production yield

Conductive Additives for Secondary Batteries

  • High-conductivity, high-concentration conductive additives for silicon-based anodes
  • Development of conductive additive products for high-capacity, high-rate secondary-battery anodes using carbon nanotube, graphene, and solvent/water-based dispersion technologies
everchemtech-swcnt-graphene-carbon black-dispersion-for-si-anode
Conductive Additives for Secondary Batteries

What Are Conductive Additives in Secondary Batteries?

Conductive additives are materials added to electrodes to facilitate electron transport between active materials in the cathode and anode. Although they are used in relatively small amounts, they play a critical role in enhancing battery performance.

Why Conductive Additives are needed in Secondary Battery Anodes

  • [Higher Capacity] The required conductive additive loading can be reduced to approximately one-fifth that of conventional carbon black conductive additives.
  • [Longer Life and Faster Charging] CNT conductive additives can help suppress the volume expansion of silicon-based anode materials, contributing to longer battery life and faster charging.
  • As silicon content in anode materials increases, the need for SWCNT conductive additives continues to grow.

Low-Reflection Coating Agent for Smartphone Camera Modules

Low-Reflection Coating Agent for Smartphone Camera Modules
Low-Reflection Coating Agent for Smartphone Camera Modules

Low-reflection coating designed to enhance the resolution of smartphone camera modules

Item Unit Value
L* - 0.88
Reflective % 0.13
X-cut B 5
Processing - Spray coating, PAD coating