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Self-Powered Thermoelectric Fabric ThermoKnit Enters Mass Production: Body Heat Alone Can Continuously Power Wearable Devices

ThermoKnit thermoelectric fabric, jointly released by the Chinese Academy of Sciences' Suzhou Institute of Nano-Tech and Anta Sports, generates continuous electricity from the temperature difference between body heat and the environment, producing 12 milliwatts per square meter with a 5-degree differential.

Self-Powered Thermoelectric Fabric ThermoKnit Enters Mass Production: Body Heat Alone Can Continuously Power Wearable Devices

ThermoKnit thermoelectric fabric, jointly developed by the Chinese Academy of Sciences' Suzhou Institute of Nano-Tech and Nano-Bionics and Anta Sports, began mass production on June 10. The fabric weaves bismuth telluride thermoelectric fibers directly into the textile, generating continuous electricity from the temperature difference between human skin and the surrounding environment.

At a room temperature of 25 degrees Celsius (with a body-to-ambient temperature differential of about 12 degrees), ThermoKnit can produce approximately 12 milliwatts of power per square meter — enough to continuously drive a heart rate sensor and a Bluetooth Low Energy chip. After 50 standard wash tests, the fabric's power generation efficiency declined by only 8%.

Anta plans to launch its first ThermoKnit-powered sports T-shirt in autumn 2030, with built-in heart rate, body temperature, and motion sensors that operate continuously without a rechargeable battery. The product is expected to be priced at 599 RMB.