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PRODUCT INTRODUCTION

Electrolyte

The electrolyte produced by Dongwha Electrolyte is applied in various forms and applications, such as lithium secondary batteries and lithium primary batteries (prismatic, cylindrical and polymer), and capacitors. We supply various high-performance and high-stability electrolytes to battery-related companies.

The electrolyte for lithium secondary batteries is an ion conductor that dissolves lithium salts in high-dielectric, high-viscosity, and low-viscosity organic solvents. It must have high ionic conductivity, low freezing point, appropriate concentration of lithium salt and electrochemical stability.

We are advancing toward becoming the world's best electrolyte manufacturer through various formulation applications and additive researches In order to manufacture high-performance, high-stability electrolytes.

01. Introduction

An electrolyte is produced by dissolving lithium salts such as LiPF6 in a mixture of 3 to 5 types of cyclic carbonate-based and linear carbonate-based organic solvents.

Type of organic solvent
Cyclic Carbonate

Linear Carbonate
Lithium Salt includes LiAsF6, LiCIO4, LiBF4, LiTFSI, LiBOB, and LiFSI

02. Features of electrolyte

수지 제품별 특징 및 활용분야
Category Features
High power Low resistance / high ionic conductivity electrolyte
Long-life 전극계면층 안정화 전해액
High capacity High voltage / oxidation-inhabited electrolyte / electrolyte for silicon cathode
High reliability High temperature decomposition and gas generation-inhibited electrolyte / polymer electrolyte
High stability Flame retardant / electrolyte with overcharge inhibitor

03. Applications of electrolyte

Lithium-ion battery (cylindrical, square, polymer) of laptops, smartphones, and wireless home appliances, ESS, electric vehicle (xEV).

04. Features of Electrolyte Products

· Solvent purity 99.99%
· Moisture content 20ppm
· Metal ion 5ppm
· Protic Solvent content 100ppm
- Promote decomposition under high voltage (above 3.5V) and react easily with lithium metal
- H2 generation and irreversible capacity increase due to decomposition reaction with lithium metal
· Impurities ↓
· Effect on resistance value after battery manufacturing
· Influence on quality stability of electrolyte
· Causes battery performance variation

05. Electrolyte specification

Test Item Unit Specification Actual Data Test Method
Moisture ppm 20 Max. 10 Max. Karl-Fischer
Acid as HF ppm 50 Max. 30 Max. Titration
Chloride Content ppm 5 Max. 1 Max. Turbidimetry
Sulfate Content ppm 10 Max. 1 Max. Turbidimetry
Alkaline Metal ppm 5 Max. 1 Max. ICP-MS
Heavy Metal ppm 5 Max. 1 Max. ICP-MS

06. Core competency

· Leading company for electrolyte for lithium secondary batteries
- 61,000 tonnes/year production capacity
- Own supply chain of core additives for xEV
· Building a global business infrastructure
- Own production sites in three countries (Korea, China, Malaysia)
- Global raw material supply and demand channels (LiPF6 strategic partners)
· Accumulated development capability
- 112 patents (80 domestic and 32 overseas)
- Excellent manpower in electrolyte field
- Established a joint development system with affiliates and major additive companies
· Provide Best Solution
- Possesses full-cell test equipment (co-development and evaluation with customers)
- Fast response to customer needs and maintain long-term partnership
- Joint development of next-generation models with major xEV battery makers