In the race for higher energy density within the new energy lithium battery industry, silicon-carbon anodes have emerged as the core key material for next-generation high-capacity batteries, owing to their theoretical capacity far exceeding that of traditional graphite anodes.
However, the significant volume expansion of silicon-based materials—reaching up to 300% during charge-discharge cycles—causes electrode structural failure and repeated formation and detachment of the SEI film. This process generates substantial gas production. This “gas evolution challenge” not only severely impacts battery cycle life and safety but also represents a critical bottleneck constraining the large-scale commercial application of silicon-carbon anodes.
While the industry continues to experiment with solutions for silicon-carbon anode gas evolution, Wofly Technology has already emerged as a key force in overcoming this challenge through its deep insights into lithium battery material processes and accumulated technological expertise. We understand that resolving gas evolution isn't merely about “blocking” it, but requires building a comprehensive solution across the entire chain: “material modification - process optimization - equipment adaptation.” This integrated approach is precisely Wofly Technology's core strength.
Ⅰ. Precise Diagnosis
To resolve gas generation issues, it is essential to first identify the sources and mechanisms of gas formation and establish a comprehensive analytical system for gas generation in silicon-carbon anodes.
⒈ Gas Component Analysis
Using high-precision online gas detection equipment, we accurately capture gases such as CO, CO₂, and CH₄ generated during charging and discharging processes. This confirms that the breakdown and decomposition of the SEI film, along with reactions between the electrolyte and active materials, are the primary sources of gas generation.
⒉ Volume Expansion Tracking
Through in-situ electron microscopy observation and expansion force testing, the volume change patterns of electrodes under different silicon contents and coating processes were recorded in real time. It was discovered that “silicon particle agglomeration” and “binder failure” are the key factors accelerating gas generation.
Based on this data analysis, we transcend the limitations of “single-link optimization” and propose an end-to-end solution spanning “from material design to process implementation,” laying the groundwork for subsequent technological breakthroughs.
Ⅱ. Technological Breakthrough
In the industrialization of silicon-carbon anodes, Wofly Technology is not merely an equipment supplier but a collaborative partner deeply involved in technological R&D. We assist the industry in overcoming gas generation challenges through three key dimensions.
⒈ Customized Coating Equipment
Giving Silicon Particles an “Anti-Expansion Coat”
• Utilizes a customized system to achieve uniform mixing of silicon particles with carbon sources (such as asphalt or resin), preventing coating defects caused by localized agglomeration;
• Precisely controls reaction temperature and pressure curves to ensure a dense yet elastic coating layer that both blocks electrolyte penetration and buffers expansion stress from silicon particles, thereby reducing SEI film rupture and gas generation at the source.
⒉ Intelligent Drying System
Eliminates the risk of moisture-induced gas generation
• Pioneering the use of “gradient heating + pulsed vacuum” technology to maintain material moisture content below industry averages;
• Equipped with an online moisture monitoring module that provides real-time feedback on drying effectiveness, preventing structural damage caused by over-drying and balancing “dryness” with “material stability.”
⒊ Full-Process Engineering Consulting
Bridge the final gap from lab to production line
• Provide selection recommendations, suggesting polymer binders with superior elasticity to enhance electrode structural stability;
• Customize equipment parameters and process curves for anode formulations with varying silicon content to prevent gas evolution issues caused by one-size-fits-all production approaches.
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Ⅲ. Industry Outlook
As demand for high-energy-density batteries grows increasingly urgent in sectors like new energy vehicles and energy storage, the commercialization of silicon-carbon anodes is accelerating. The extent to which gas evolution issues are resolved will directly determine the pace of industry advancement. Wofly Technology firmly believes that the deep integration of equipment technology and material processing is the core path to solving industry challenges.
1. Moving Forward Together
Moving forward, we will continue to address the technical challenges of silicon-carbon anodes. On one hand, we will develop more efficient “in-situ coating-drying integrated equipment” to further streamline processes and reduce costs. On the other hand, we will explore AI applications in optimizing process parameters, leveraging big data analytics to accurately predict gas generation risks and provide customers with “predictive maintenance” services.
2. Wofly Power
From breakthroughs in laboratory technology to stable mass production on the assembly line, Wofly Technology has consistently moved in sync with the lithium battery industry. We understand that every reduction in gas production rate represents progress toward the goal of “higher energy density and safer batteries”; every piece of equipment put into operation injects “Wofly's strength” into the advancement of the new energy industry.
Exploring the Path to Technological Breakthroughs
The gas evolution challenge in silicon-carbon anodes presents both an industry-wide “challenge” and a “opportunity” for technological breakthroughs. Wofly Technology is committed to collaborating with industry partners through superior equipment and professional services to overcome technical hurdles. We aim to accelerate the large-scale commercialization of silicon-carbon anodes, contributing to the sustainable development of the global new energy sector!
If you are facing challenges with gas evolution in silicon-carbon anodes, or require customized equipment solutions and process optimization, we invite you to join us in exploring breakthroughs in this field!
Post time: Oct-15-2025