Puresci Tackles The Hydrogen Sulfide Challenge in Sulfide-Based Solid-State Batteries, Supporting LG Energy Solution’s Ochang Facility Ahead of Initial Mass Production

As 2027 approaches, the battery industry is moving closer to the initial mass production of all-solid-state batteries. Leading companies, including BYD, CATL, Gotion High-Tech, and Farasis Energy, have identified 2027 as a key milestone in their solid-state battery development plans. The global new energy industry is entering a critical stage of preparation for the initial scale-up of this next-generation technology.

Against this backdrop, Puresci is addressing a critical yet often overlooked challenge in sulfide-based solid-state batteries: the efficient and reliable treatment of hydrogen sulfide (H₂S).

Recently, Puresci, together with its Korean partner, visited LG Energy Solution’s Ochang facility in South Korea to engage in in-depth technical discussions on production environment control and hydrogen sulfide treatment for solid-state battery manufacturing.

This engagement marks an important step in bringing Puresci’s hydrogen sulfide treatment process package into technical discussions with a leading global battery manufacturer, helping address a key process challenge ahead of the anticipated scale-up of solid-state battery production in 2027.

01. Addressing a Critical Challenge: Hydrogen Sulfide Treatment as a Key Barrier to Sulfide-Based Battery Manufacturing

Sulfide-based solid electrolytes are considered one of the most promising technologies for all-solid-state batteries, thanks to their high ionic conductivity and favorable mechanical properties.

However, while much of the industry's early attention has focused on electrolyte materials themselves, hydrogen sulfide generated during certain manufacturing processes and under specific operating conditions presents another critical challenge. Hydrogen sulfide is toxic and corrosive, creating potential risks for personnel safety, production equipment, and manufacturing environments.

The ability to manage hydrogen sulfide safely, reliably, and cost-effectively is therefore an important consideration in the industrial-scale production of sulfide-based solid-state batteries.

Building on more than a decade of experience in air treatment technologies and materials, Puresci identified this technical gap early and invested in a dedicated laboratory for hydrogen sulfide treatment research and development.

Through sustained technical development and testing, Puresci has achieved the following treatment performance under specified test conditions:

• Inlet H₂S concentration: 5 ppm

• Outlet H₂S concentration: Below 0.6 ppm

• Single-pass removal efficiency: Greater than 90%

These results represent performance indicators developed for practical process applications, rather than merely laboratory demonstrations. Puresci focuses on addressing real manufacturing challenges through measurable and application-oriented engineering solutions.

02. From Individual Products to an Integrated Process Package: A Scalable Solution for Industrial Applications

In 2026, Puresci officially introduced its hydrogen sulfide treatment process package to the global market.

Rather than offering a standalone product, Puresci provides an integrated solution designed to address multiple requirements in solid-state battery manufacturing, including:

• Dedicated hydrogen sulfide treatment products: Designed for long service life, application flexibility, and operation without generating hazardous waste under specified operating conditions.

• Gas monitoring and concentration warning systems: Supporting process monitoring and early warning through hydrogen sulfide detection and concentration monitoring.

• Process-adaptable dynamic treatment modules: Configurable for different production areas and operating conditions, including integrated dehumidification and H₂S removal, as well as dust removal and H₂S treatment.

• Energy optimization and regeneration solutions: Designed to help reduce overall operating costs and improve resource utilization.

The process package is covered by related patent applications across relevant jurisdictions, supporting the development of Puresci’s proprietary intellectual property portfolio.

For battery manufacturers, this integrated approach can reduce the need to develop hydrogen sulfide treatment processes entirely from scratch. By combining dedicated treatment products, monitoring systems, process integration, and energy optimization, Puresci aims to help customers reduce engineering uncertainty and support safer, more reliable production scale-up.

03. Technical Engagement at LG Energy Solution: Advancing Process Validation for Solid-State Battery Manufacturing

Puresci’s recent visit to LG Energy Solution’s Ochang facility, together with its Korea

n partner, represents an important opportunity to explore the application of its hydrogen sulfide treatment process package in the solid-state battery sector.

As a leading global battery manufacturer, LG Energy Solution operates in an industry where supplier capabilities, process reliability, and the validation of technical performance are critical considerations.

The technical discussions focused on several key areas:

• Hydrogen sulfide generation and release characteristics: Exploring the mechanisms and release patterns associated with sulfide electrolyte manufacturing processes.

• Process integration: Discussing potential approaches for integrating Puresci’s treatment package into relevant production environments.

• Scale-up and validation: Exploring verification approaches for translating laboratory performance data into practical, large-scale industrial applications.

This engagement goes beyond a routine business visit. It provides an opportunity to exchange technical insights and explore process requirements ahead of the anticipated scale-up of solid-state battery manufacturing.

Puresci believes this is an important step toward deeper collaboration with the global solid-state battery industry.

Looking Ahead: Enabling Safer and More Efficient Solid-State Battery Manufacturing

As solid-state batteries move toward industrialization, effective management of hydrogen sulfide and other process-related challenges will become increasingly important.

Puresci will continue to build on its expertise in air treatment technologies, functional materials, and integrated process engineering to develop solutions that address the evolving needs of advanced battery manufacturing.

By combining hydrogen sulfide treatment, environmental monitoring, process integration, and energy optimization, Puresci aims to support battery manufacturers and industrial partners in building safer, more efficient, and more sustainable production processes.

Puresci — Advancing Air Treatment Technology for the Next Generation of Energy.