Amid the wave of new energy storage technology upgrading toward "higher safety, lower energy consumption, and wider application scenarios," electrode sheets—acting as the "core energy carrier" of energy storage devices—have their manufacturing process innovation directly determining the efficiency and upper limit of technology implementation. Traditional wet-process electrode sheets rely on organic solvents to prepare slurries, which not only face pressure from environmental compliance but also struggle to meet multi-scenario needs in terms of performance adaptability. In contrast, dry-process electrode sheets, with their green attribute of "solvent-free manufacturing" and flexible advantage of "high adaptability to multiple devices," are rapidly emerging as the "new favorite" in the new energy storage field. From breakthroughs in fast charging for lithium-ion batteries to the expansion of application scenarios for supercapacitors, they comprehensively drive the industrialization of energy storage technology.

I. Solvent-Free: Solving Manufacturing Pain Points to Meet the Rigid Demand for Green Development

The large-scale expansion of the new energy industry has made "cost reduction and carbon emission reduction" a core indicator of industry competition. The long-standing "solvent dependence" pain point of wet-process electrode sheets is precisely addressed by the "solvent-free process" of dry-process electrode sheets, which has become the primary reason for their popularity.

In the preparation of wet-process electrode sheets, the use of organic solvents runs through the entire process of "slurry mixing - high-temperature drying - solvent recovery," which not only increases costs but also brings environmental and safety risks. Additional equipment investment is required for solvent recovery, the drying process accounts for a high proportion of energy consumption, harmful substances generated by volatilization need special treatment, and residual solvents may even affect the stability and service life of energy storage devices.

Dry-process electrode sheets completely abandon solvents and directly composite active materials, conductive agents, and dry binders onto current collectors through a process of dry powder mixing, high-shear fiberization, and precision calendering. This transformation brings three core values: first, better cost advantages—by eliminating solvent procurement, recovery, and drying energy consumption, the overall manufacturing cost is significantly reduced; second, prominent environmental attributes—no harmful substances are emitted throughout the process, perfectly aligning with the "dual carbon" goals and helping enterprises meet strict environmental compliance requirements; third, more stable quality—no solvent residues avoid electrode micropore collapse and interface side reactions, greatly improving the consistency of energy storage devices and reducing performance deviations caused by manufacturing processes.

With increasingly strict environmental policies, the "solvent-free" feature of dry-process electrode sheets not only helps enterprises avoid compliance risks but also enhances supply chain competitiveness through green manufacturing labels. For example, a European battery enterprise successfully entered the EU "green battery" certification list with its dry-process electrode sheet technology, obtaining tariff reductions and priority market access qualifications—proving the industrial value of solvent-free manufacturing.

II. Highly Adaptable: Cross-Device Compatibility to Unlock Multi-Scenario Application Potential

The demand scenarios for new energy storage are becoming increasingly diverse: lithium-ion batteries need to balance fast charging and long range, supercapacitors need to balance power density and energy density, home energy storage requires high safety, and industrial energy storage pursues low costs. Dry-process electrode sheets, with their "high adaptability" to different energy storage devices, break the limitation of traditional electrode sheets' "one process for one device" and become a key material connecting multiple scenarios.

Adapting to Lithium-Ion Batteries: Breaking Through Fast Charging and Safety Bottlenecks

The fast-charging capability of lithium-ion batteries is limited by the ion transport efficiency of electrodes. Due to uneven binder distribution, wet-process electrode sheets tend to form "ion transport dead zones," leading to increased internal resistance and severe heat generation during fast charging. Dry-process electrode sheets build a "3D three-dimensional conductive network" through dry mixing, where conductive agents uniformly wrap active materials, greatly improving ion migration rate to easily achieve fast charging, with better capacity retention after cyclic use. At the same time, the solvent-free feature of dry-process electrode sheets can effectively suppress the volume expansion of high-capacity anode materials and improve battery thermal stability, building a solid safety barrier for scenarios such as new energy vehicles and energy storage stations.

Adapting to Supercapacitors: Balancing Power Density and Energy Density

Although supercapacitors are known for their high power density, their low energy density limits their application in long-duration energy storage. When preparing supercapacitors with wet-process electrode sheets, solvent volatilization easily causes electrode micropore blockage, affecting charge storage and transmission efficiency. Dry-process electrode sheets, through precise control of the calendering process, build a hierarchical pore structure of "macropores for charge storage and micropores for mass transfer," significantly increasing electrode specific surface area. While maintaining high power density, they effectively improve energy density and expand the application boundaries of supercapacitors. For example, in the scenario of rail transit braking energy recovery, supercapacitors equipped with dry-process electrode sheets can efficiently capture braking electrical energy, achieve energy conservation and consumption reduction, and improve operational efficiency.

Adapting to Hybrid Energy Storage Systems: Achieving the "1+1>2" Synergistic Effect

With the increasing complexity of energy storage scenarios, "hybrid energy storage systems" composed of lithium-ion batteries and supercapacitors have become a new trend. The high adaptability of dry-process electrode sheets enables more efficient system integration. For instance, in a solar-storage-charging integrated station, dry-process electrode lithium-ion batteries are responsible for long-duration energy storage, while dry-process electrode supercapacitors handle instantaneous power regulation. Thanks to the same-source electrode sheet process, the two are highly matched in charge-discharge control logic and temperature adaptability, greatly improving system response speed and energy utilization efficiency, and avoiding performance losses caused by poor device adaptability.

III. Technological Iteration: From Process Optimization to Material Synergy, Consolidating the "New Favorite" Status

The rise of dry-process electrode sheets is no accident; it is driven by the dual forces of "process breakthroughs and material synergy." In terms of process, the maturity of technologies such as "multi-layer simultaneous calendering" and "low-temperature fiberization" has upgraded dry-process electrode sheets from "single structure" to "gradient structure." By adjusting the ratio of active materials and conductive agents in different layers, they can meet both "high energy" and "high power" requirements, improving transmission efficiency while ensuring no loss of energy density.

In terms of materials, the synergistic adaptation between dry-process electrode sheets and new energy storage materials further expands their application scope. To address the interface stability issue of high-activity cathode materials, the dry process can uniformly mix coating layers with cathode particles to suppress side reactions; to solve the "solid-solid contact" pain point of solid electrolytes, dry-process electrode sheets achieve tight bonding with solid electrolytes through precision calendering, reducing interface impedance. This positive cycle of "process adapting to materials and materials feeding back to performance" allows dry-process electrode sheets to maintain competitiveness in technological iteration.

From "solvent-free" solving manufacturing and environmental pain points, to "high adaptability" unlocking multi-scenario applications, and then to "technological iteration" consolidating performance advantages, dry-process electrode sheets accurately meet the core needs of new energy storage technology. At a time when the demand for fast charging of lithium-ion batteries is surging, the application scenarios of supercapacitors are expanding, and hybrid energy storage systems are becoming popular, dry-process electrode sheets are not just a process innovation, but also a key link promoting energy storage technology from "single device optimization" to "system-level upgrading." With the further maturity of large-scale production technology, dry-process electrode sheets will surely occupy a more core position in the new energy storage field and become an important material force supporting the achievement of "dual carbon" goals.