Secondary Battery Materials

EPCHEMTECH supplies the top-quality electrolytes and additives.

Secondary Battery Materials

Secondary Battery Materials: EPCHEMTECH supplies electrolytes and additives, which are materials for secondary batteries. We develop and produce electrolytes and additives that enhance battery performance, including lifespan, stability, and charging speed.

Korea's first independent manufacturing technology for LiFSI in lithium-ion secondary batteries was developed in 2016, and a patent for it was obtained. We continue to strengthen our technologies.

  • Lithium salt
  • Sodium Salt
  • Additive
  • Separator Binder
  • Ionic Liquid Electrolyte

Lithium salt

Name Product Name Structure Features Inquiry
LiFSI Lithium bis(fluorosulfonyl)imide

Improving battery stability and lifespan

Suppressing battery discharge at low temperature
LiPO2F2 Lithium difluorophosphate

Reducing charging time

Improving battery lifespan and producing high output
LiBOB Lithium bis(oxalato)borate

Improving battery lifespan

Increasing high-temperature stability
LiDFOP Lithium difluoro bis(oxalato)phosphate

Improving battery stability and performance

TEL : Chemical Business Division 063-731-0045

Electrolyte

  • Electrolyte plays a role in moving lithium ions between electrodes at battery charging and discharging

Next-generation Electrolyte

LiFSI

  • Providing the highest iconic conductivity among electrolytes available in the market, producing excellent stability against high temperatures as the pyrolysis temperature is high
  • Effects to increase battery lifespan, reduce charging time, and improve low-temperature performance verified
  • The increasing amount of LiFSI electrolyte supplements the performance of the LFP battery
  • Core electrolyte to be applied to new batteries such as lithium-sulfur battery
Type FSI TFSI PF6
Pyrolysis Temperature(°C) 308 337 154
Li+ Ionic Conductivity (10-3 S/cm) 9.8 4.7 8.0

Sodium Salt

Name Product Name Structure Features Inquiry
NaFSI Sodium bis(fluorosulfonyl)imide

High ionic conductivity and wide operating temperature range

Improving sodium battery lifespan
NaPO2F2 Sodium difluorophosphate

Forming CEI of high ionic conductivity

Improving sodium battery output
NaBOB Sodium bis(oxalato)borate

Wide operating voltage range

Increasing high-temperature stability of batteries
NaDFOP Sodium difluoro bis(oxalato)phosphate

Excellent reversible specific charge capacity and fast charging speed

Improving battery stability and performance

TEL : Chemical Business Division 063-731-0045

Additive

Name Product Name Structure Features Inquiry
CsFSI Cesium bis(fluorosulfonyl)imide

Forming a thin and solid SEI layer, improving explosion stability at battery penetration

Reducing gas, improving high-temperature output
FEC Fluoroethylene carbonate

Increasing oxidation-resistant lifespan, improving inter-facial moving speed
VC Vinylene Carbonate

Forming the SEI layer, preventing deterioration through SEI

Improving battery stability, extending battery lifespan
HTCN 1,3,6-Hexanetricarbonitrile

Improving battery lifespan

Preventing metallic ion melting by forming an anode protective layer
TMSB Tris(trimethylsilyl)borate

Increasing battery stability under high output

Preventing deterioration, improving lifespan
DPN Ethylene Glycol bis [propionitrile]Ether

Ensuring stable driving at high output
CHB Cyclohexylbenzene

Improving stability against explosion due to overcharging, minimizing capacity reduction under high temperature

TEL : Chemical Business Division 063-731-0045

CsFSI

Additive to improve the stability of lithium-ion batteries against explosions, with a small amount added to the electrolyte

  • Improving battery output at storage under high temperature
  • Improving battery cycle life characteristics at ambient temperature and high temperature
  • Effect to improve stability verified through battery penetration test

New additive supplied by EPCHEMTECH, output after storage under high temperature improved by 14% in comparison to VC addition

Type Electrolyte composition
LiPF6 in EC/EMC/DMC
LiPF6 in EC/EMC/DMC + VC
LiPF6 in EC/EMC/DMC + VC + LiFSI
LiPF6 in EC/EMC/DMC + VC + CsFSI 0.5%
LiPF6 in EC/EMC/DMC + VC + CsFSI 0.1%

Separator Binder

Name Product Name Features Inquiry
EP-WB01 Water-based binder 01

Prevent membrane shrinkage or rupture

Explosion proof

TEL : Chemical Business Division 063-731-0045

Separator Binder

  • Core material to improve separator performance, strengthening safety by decreasing heat shrinkage rate

Water-Based Binder - EP-WB01

  • Water based type thermosetting binder
  • Excellent adhesion to ceramic materials (separator)
  • Providing excellent heat resistance to prevent separator shrinking and improve explosion prevention performance

Comparison of adhesive strength and charge/discharge performance

Heat resistance test

Before heating

General membrane
EP-WB-01
Coated separator

After heating in a 120 degree oven

General membrane
EP-WB-01
Coated separator

Ionic Liquid Electrolyte

Name Product Name Features Inquiry
EP-IL01 Ionic-liquid 01

Non-volatile, nonflammable

Improving battery stability against explosion

Preventing battery deterioration

TEL : Chemical Business Division 063-731-0045

EP-IL01 (Ionic liquid electrolyte for solid-state battery)

Ionic liquid electrolyte containing FSI anion, used for flame-retardant products and solid-state electrolyte

  • Non-volatile and nonflammable, used for flame-retardant products
  • Self-extinguishing, improving battery stability against explosion
  • Preventing battery deterioration by filling blank space between electrode and solid electrolyte

Self-extinguishing Features

Ionic liquid electrolytes have the characteristics of being non-flammable, can be mixed with organic solvents, and have the characteristic of
self-extinguishing in the event of a battery fire

At the initial stage of ignition, the fire is ignited by the carbonate solvent, which is a flammable organic solvent, but as time passes, self-extinguishment occurs by the liquid electrolyte, which is a flammable solvent.

  • Polymer and solid electrolyte shorten the battery lifespan by forming pores (blank space) between the electrode and electrolyte
  • Preventing battery performance deterioration and improving stability against explosion by filling pores using ionic liquid electrolyte as the solvent