High-Performance Viologen Compound | CAS 138926-07-5 Ethyl Viologen Bis(hexafluorophosphate) Empowers Upgrading of New Energy & Advanced Materials

Against the background of continuous breakthroughs in new energy materials, electrochromic devices and advanced electrochemical research, viologen compounds have become a hotspot in materials science owing to their unique redox properties. Our company officially launches high-purity Ethyl Viologen Bis(hexafluorophosphate) (CAS 138926-07-5), which provides core material solutions for cutting-edge fields including lithium batteries, electrochromism and sensors with excellent electrochemical stability, reversible color-changing performance and high purity, supporting scientific innovation and industrial upgrading.

I. Basic Product Information

Chinese Name: Ethyl Viologen Bis(hexafluorophosphate)

English Name: Ethyl Viologen Bis(hexafluorophosphate)

CAS No.: 138926-07-5

Formula: C₁₄H₁₈F₁₂N₂P₂

Molecular Weight: 504.23

Appearance: White to pale yellow crystalline powder

Purity: ≥98% (HPLC), customizable to 99% high-purity grade

Melting Point: 242–244 °C

Solubility: Freely soluble in organic solvents such as acetonitrile and dimethyl carbonate; slightly soluble in water; excellent electrochemical stability

II. Core Performance Advantages

1. Outstanding Electrochemical Performance

Reversible two-electron redox: Exhibits typical viologen characteristics, undergoing two successive one-electron redox reactions (EV²⁺ ↔ EV⁺· ↔ EV⁰) with stable redox potential and fast response.

High cycling stability: The hexafluorophosphate anion (PF₆⁻) significantly improves ionic conductivity and oxidation resistance. Capacity retention exceeds 90% after 500 cycles, far superior to traditional chloride-based viologens.

Low impedance: As an additive, it stabilizes the electrode-electrolyte interface (SEI film) and effectively suppresses battery impedance increase.

2. Unique Electrochromic Properties

Remarkable reversible color change: Colorless in oxidized state (EV²⁺) and deep blue in reduced state (EV⁺·), with high contrast and excellent coloration efficiency.

Fast response: Coloration/bleaching time < 500 ms; cycle life > 10⁵ cycles, suitable for smart windows, displays and other applications.

Good processability: High crystallinity and controllable solubility; can be formed into films via solution spin-coating, electrochemical deposition, etc.

3. Material Stability & Safety

Excellent thermal stability: Decomposition temperature > 300 °C, compatible with high-temperature battery conditions and device processing.

Chemical inertness: Hydrolysis-resistant and oxidation-resistant, stable for long-term storage; non-hazardous chemical.

Low toxicity: No heavy metal residues, meets environmental protection standards, suitable for biosensing and flexible electronics.

III. Core Application Fields

1. Lithium-Ion Batteries (Core Application)

High-voltage cathode additive: At 0.2 wt% dosage in NCM811 electrolyte, capacity retention increases from 65% to 81.6% after 100 cycles, significantly inhibiting electrolyte decomposition and transition metal dissolution.

Organic electrode material: Composite with carbon materials (EV-KB) for high-loading electrodes (1.5–9 mg cm⁻²), specific capacity up to 106 mAh g⁻¹, solving issues of high solubility and poor cycling of traditional viologens.

Redox flow batteries: Used as cathodic active material with energy efficiency > 80%, suitable for large-scale energy storage systems.

2. Electrochromic Devices

Smart windows: PET-ITO based flexible devices realize reversible color switching between colorless and deep blue, optical contrast > 40%, used in energy-saving buildings and automotive sunroofs.

Flexible displays & anti-counterfeiting: Driven by low voltage (±1.5 V), flexible and bendable, used in e-paper, smart labels and dynamic anti-counterfeiting labels.

3. Other Cutting-Edge Applications

Electrochemical sensing: Acts as an electron transfer mediator for detecting heavy metal ions and biomolecules with nM-level sensitivity.

Photocatalysis & energy storage: Synergizes with semiconductor materials to enhance photogenerated charge separation, applied in CO₂ reduction and water splitting systems.

Supercapacitors: Used as pseudocapacitive active material with power density up to 5 kW kg⁻¹ and cycle life > 10⁴ cycles.

IV. Production & Quality Assurance

Synthesis process: Two-step method (quaternization + anion exchange), solvent-free reaction, yield > 75%, impurity residue < 0.5%.

Full-process quality control: Raw materials tested by ICP-MS and GC-MS; online monitoring during synthesis; finished products fully characterized by HPLC, TGA, DSC and electrochemical workstation.

Compliance & certification: ISO 9001 and REACH certified; complete MSDS, COA and synthetic route provided, supporting scientific research filing and industrial registration.

Large-scale supply: Kilogram to ton-level capacity; packaging: 100 g / 500 g / 1 kg / 25 kg; sealed and stored dry and away from light; global cold-chain delivery.

V. Market Prospect & Value

With the explosive growth of new energy vehicles, energy storage power stations and smart buildings, the demand for high-performance organic functional materials is growing at over 25% annually.

Ethyl Viologen Bis(hexafluorophosphate) combines excellent electrochemical stability, high electrochromic efficiency and flexible processability, filling gaps in high-voltage battery additives and flexible electrochromic materials. It has been recognized by the Chinese Academy of Sciences, 985 universities and leading battery enterprises, becoming a key material for next-generation energy storage and optoelectronic devices.

Driven by material innovation, we are leading the revolution in energy and optoelectronics. With dual-function characteristics, Ethyl Viologen Bis(hexafluorophosphate) (CAS 138926-07-5) serves as a core bridge connecting basic research and industrial applications.

Adhering to the philosophy of technology leadership, superior quality and precise service, we provide full-chain support from R&D to mass production, and work with global partners to explore the blue ocean of advanced materials, empowering a green and low-carbon future.

For samples, technical parameters or application solutions, please contact us!