i2Cool Raises Tens of Millions of Yuan for Electricity-Free Cooling Technology

i2Cool, a Shenzhen-based company developing electricity-free passive radiative cooling materials, has completed a Series B funding round worth tens of millions of yuan, equivalent to several million US dollars, backed by Shenzhen TopoScend Capital, with Linglu Capital serving as exclusive financial adviser. Proceeds will fund standardised nanoparticle production lines, continued technology development, talent recruitment, and commercial expansion across priority global markets.

 

Why Passive Radiative Cooling Addresses a Fundamentally Different Energy Problem Than Air Conditioning

 

Conventional air conditioning cools spaces by actively removing heat using electricity-powered compressors and refrigerants, a process that itself generates additional electricity demand and, depending on the refrigerant used, can carry its own direct emissions impact. i2Cool's technology instead achieves cooling passively, without consuming any electricity or using refrigerants at all, by engineering material surfaces to simultaneously reflect incoming solar radiation and emit thermal energy directly into space through what's known as the atmospheric window, a specific wavelength band, roughly 8 to 13 micrometres, where Earth's atmosphere is largely transparent, allowing heat to radiate outward into space rather than being absorbed and re-emitted back toward the surface as greenhouse gases typically do at other wavelengths.

That mechanism means a surface coated with this kind of radiative cooling material can actually cool below ambient air temperature during daytime, using no external energy input whatsoever, a genuinely different physical process from conventional cooling technology, since it exploits the specific optical properties of the atmosphere itself rather than relying on mechanical heat extraction and electrical power. That distinction matters considerably for the technology's potential energy and emissions impact, since any application where this material replaces or supplements conventional air conditioning represents a direct reduction in electricity demand for cooling specifically, rather than simply making existing cooling systems marginally more efficient.

 

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Why the Company's Own Caveat About Its Science Publication Deserves Attention

 

The release cites research involving i2Cool team members published in the journal Science, describing a "hierarchically structured passive radiative cooling ceramic" achieving 99.6 percent solar reflectivity and 96.5 percent mid-infrared emissivity. Notably, the release itself explicitly states these figures "relate specifically to the research material reported in the paper and should not be interpreted as uniform specifications across all of i2Cool's commercial products," a distinction the company separately quantifies for its actual commercial products at "more than 95%" for both solar reflectivity and mid-infrared emissivity.

That explicit caveat is worth taking at face value: academic research papers frequently report peak performance figures achieved under carefully controlled laboratory conditions using materials that may not yet be commercially manufacturable at scale, cost, or durability suitable for real-world deployment, and the gap between a 99.6 percent laboratory result and a "more than 95%" commercial product specification, while both genuinely strong performance figures, represents a meaningful and expected difference between research-grade material performance and what a company can reliably manufacture and sell commercially at volume.

 

Why the AI-Powered Optical Simulation Claim Warrants Scrutiny as an Internal Benchmark

 

The release states that combining AI-powered optical simulation with polymer materials science has improved the company's R&D efficiency "by a factor of 12 compared with conventional methods," but explicitly attributes this figure to "the company's internal development benchmarks" rather than an independently verified or externally audited measurement. That distinction matters for how much weight to place on the specific multiplier cited, since internal efficiency benchmarks, while potentially genuinely reflecting real workflow improvements, are inherently self-reported and not independently verified in the way the company's more externally referenceable figures, such as its Science publication citation or its disclosed order backlog, can be cross-checked against outside sources.

 

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Why the Order Backlog and Revenue Growth Figures Suggest Genuine Commercial Traction

 

i2Cool reports an order backlog of 120 million yuan, approximately $17.9 million, alongside a three-year compound annual growth rate of 377 percent in operating revenue, with overseas markets now accounting for 50 percent of total revenue across more than 30 countries and regions. That combination of a substantial existing order backlog, rapid historical revenue growth, and a genuinely diversified international customer base, rather than revenue concentrated primarily within China's domestic market, suggests the company has moved beyond early-stage pilot deployment into demonstrated, repeatable commercial sales across multiple distinct geographic markets.

The company's stated expansion into AI data centres, robotics and new energy vehicles, alongside its established building and power infrastructure applications, and named industry partnerships with Sunwoda Electronic, Towngas and Toyota Tsusho, further indicates the technology is finding application across genuinely different end-use sectors rather than remaining confined to a single narrow use case, a pattern that could support continued growth if the underlying cooling performance translates effectively across these varied application contexts.

 

Why TopoScend Capital's Framing Connects This Investment to Broader Chinese Industrial Policy

 

TopoScend Capital Vice President Yanping Shi specifically tied the investment to China's upcoming 15th Five-Year Plan period and its "dual-carbon goals," stating that "tighter carbon-intensity requirements are accelerating green transformation across industries." That framing positions this Series B round within a broader pattern of Chinese state-linked and policy-aligned investment capital specifically targeting companies whose technology supports the country's stated decarbonisation and energy efficiency policy objectives, similar to the pattern visible in CATL's carbon neutrality announcement and broader Chinese battery and clean technology investment covered elsewhere in recent reporting, where domestic climate policy commitments appear to directly inform where domestic investment capital is being deliberately directed.