Since 2026, the lithium-battery electrolyte additive sector has entered a new round of structural prosperity. Driven by both the rapid surge in energy-storage demand and tight supply-side capacity, the prices of core addiztives—represented by vinyl carbonate (VC)—have continued to rise. As of early August, the average domestic price of VC had exceeded 230,000 yuan per ton, representing a year-on-year increase of over 400%. Against this backdrop, Shijiazhuang Pengnuo Technology Co., Ltd., which specializes in fine chemicals and new-energy materials, is providing downstream battery manufacturers with performance-enhancing solutions through a range of high-quality electrolyte additives, including Ethylene Sulfate (CAS 1072-53-3).
Industry Trend: Energy storage boosts demand, and additives become a critical link in the industrial chain.
In the first half of 2026, niche segments of the lithium battery industry chain showed a significant recovery. As the country accelerates the development of new energy storage and new-energy bases, shipments of energy storage batteries have surged. Compared to power batteries, energy storage electrolytes require a higher proportion of film-forming additives—typically, the proportion of core additives such as VC in energy storage electrolytes exceeds 3%, significantly higher than the 1%–3% typically found in conventional power batteries. This structural shift has directly driven rapid growth in demand for electrolyte additives.
On the supply side, additive products often involve high-risk chemical reactions and are classified as high-barrier, hazardous chemicals. Environmental impact assessments and safety reviews are rigorously enforced, and project construction periods typically last over a year and a half, limiting the industry’s supply elasticity. The earlier elimination of excess capacity, coupled with low industry inventory levels, has led to a persistent mismatch between supply and demand. Leading battery companies such as CATL and BYD have already intensively secured upstream additive production capacity through long-term contracts and equity investments. Product Focus: Vinyl Sulfate — The “Invisible Guardian” of High-Performance Batteries
Among the many electrolyte additives, ethylene sulfite (DTD) has become an indispensable key material in high-end lithium battery systems thanks to its unique film-forming mechanism and outstanding overall performance.
Ethylene sulfite is a cyclic sulfate ester compound with the molecular formula C₂H₄SO₄, appearing as a white powder at room temperature. Its core value lies in the fact that during the first charge-discharge cycle (formation) of lithium-ion batteries, ethylene sulfite preferentially undergoes a reduction reaction on the surface of the negative electrode, ahead of the electrolyte solvent, thereby forming a thin, dense solid electrolyte interphase (SEI) film rich in inorganic components such as lithium sulfate and alkyl lithium sulfates.
This SEI film acts like an “invisible guardian” on the electrode surface, playing a triple-key role:
·Blocking side reactions: Effectively isolates the direct contact between the electrolyte and electrode materials, preventing solvent molecules from co-intercalating and causing damage to the electrode structure.
·Reduced interfacial impedance: The formed SEI film allows only lithium ions to pass through freely, resulting in low interfacial impedance, which helps enhance the battery’s rate capability and low-temperature discharge performance. �� Extending cycle life: A stable SEI film significantly inhibits the continuous decomposition of the electrolyte during cycling, thereby greatly extending the battery’s cycle life. Studies have shown that adding approximately 1 wt% of ethylene sulfite to conventional carbonate electrolytes enables batteries to exhibit the highest capacity retention and optimal cycling performance. Moreover, ethylene sulfite boasts excellent high-voltage stability and can form a cathode electrolyte interphase (CEI) film rich in sulfur oxides on the cathode surface. This film effectively suppresses side reactions between the cathode and electrolyte under high-voltage conditions of 4.45 V and above, making it particularly suitable for high-end battery systems such as high-voltage lithium cobalt oxide and ternary materials. Pengnuo’s Strategic Layout: Building a Systematic Portfolio of Electrolyte Additive Products
Shijiazhuang Pengnuo Technology Co., Ltd. is deeply engaged in the fine chemical industry and has built a relatively comprehensive product portfolio centered around lithium-ion battery electrolyte additives. In addition to its core product, ethylene sulfite, the company also supplies the following series of additive products:
Table
This product portfolio covers multiple technology pathways, including cyclic sulfates and sulfonate lactones, and can meet the differentiated additive requirements of various battery systems (power, energy storage, and consumer electronics), providing downstream customers with one-stop procurement and technical support.
Quality First: The Core Competitiveness of Fine Chemical Enterprises
As a technology enterprise specializing in the R&D and supply of fine chemicals, Shijiazhuang Pengnuo Technology always puts product quality first. Lithium-battery electrolyte additives have extremely high purity requirements— even trace amounts of impurities can significantly affect the battery’s electrochemical and safety performance. During the production process, the company strictly adheres to rigorous quality-control standards to ensure that its products meet the stringent purity specifications required for battery-grade applications. Moreover, the company can provide customized purity specifications and packaging solutions tailored to customer needs. In addition to electrolyte additives, Pengnuo Technology’s product portfolio also extensively covers conductive polymers (such as PEDOT:PSS), rare-earth compounds, biological buffers, UV absorbers, pharmaceutical intermediates, and many other fields. The company’s cumulative product lineup exceeds 150 varieties, serving a range of high-tech industries including new energy, electronic information, biopharmaceuticals, and polymer materials.
Looking ahead: Seizing the opportunity to localize new energy materials. With the continued rapid development of the global new-energy vehicle and energy-storage industries, the localization and high-endization of lithium-battery materials are accelerating. As a “chip-level” material crucial for enhancing battery performance, electrolyte additives are receiving increasing attention from the industry due to their technological iteration and supply-chain security.
A relevant official from Shijiazhuang Pengnuo Technology Co., Ltd. stated that the company will continue to increase its R&D investment in the field of new energy materials. Focusing on next-generation battery technologies such as high voltage, long range, fast charging, and solid-state batteries, the company will develop more high-performance electrolyte additive products, thereby contributing its expertise in fine chemicals to the high-quality development of China’s new energy industry.
Shijiazhuang Pengnuo Technology Co., Ltd. is a technology-based enterprise specializing in the R&D, production, and sales of fine chemicals. Its product portfolio covers areas such as lithium-ion battery electrolyte additives, conductive polymers, rare-earth materials, biological buffers, UV absorbers, and pharmaceutical intermediates. The company is committed to providing high-quality chemical material solutions for advanced technology industries including new energy, electronic information, and biopharmaceuticals.
• Official Website:www.pengnuochemical.com
• E‑mail:sales@pengnuochemical.com
Post time: Aug-27-2026