en.Wedoany.com Reported - A research team from China's Tsinghua University has developed a ceramic-based micro lithium-ion battery that can withstand extreme temperatures, providing a safer power solution for smart sensors, aerospace equipment, and military applications.
Unlike traditional lithium-ion batteries that use flammable liquid electrolytes, this rechargeable solid-state battery operates stably at 150 degrees Celsius and can withstand short-term exposure to 300 degrees Celsius without performance degradation. When traditional lithium-ion batteries are exposed to high temperatures or suffer physical damage (such as puncture), the volatile electrolyte may cause fire or explosion, limiting their application in critical fields such as fire alarm systems, industrial IoT sensors, aerospace, and military defense. In a paper published on June 5 in the peer-reviewed journal Matter, the research team noted that the all-ceramic battery is small in size, high in energy density, and can operate stably over a wide temperature range without external pressure, offering a safe and mechanically robust power solution for microelectronic devices.
Lithium-ion batteries commonly use liquid electrolytes as the medium for lithium ion movement. With the proliferation of miniature devices such as smart sensors and wearable electronics, the demand for compact, safe, high-energy-density power sources that can operate in harsh environments is growing. Solid-state lithium batteries, which use solid media to transmit charge, have become a research hotspot due to their excellent safety and non-flammability. All-ceramic solid-state batteries are one of the candidate options for micro devices, but the research team pointed out that manufacturing thinner ceramic solid-state electrolytes requires balancing thickness with mechanical strength—depositing ceramic materials layer by layer may compromise their integrity.
To address this issue, the team proposed a novel multilayer anode-free all-ceramic micro lithium-ion battery, enhancing performance through technology that improves interlayer contact. This process enables the fabrication of stackable batteries whose size can be easily adapted for different applications, demonstrating good operational performance and stability over a wide temperature range from 0 to 150 degrees Celsius. Experiments showed that the battery can even continue to function normally after withstanding a thermal shock of 300 degrees Celsius for 20 seconds.
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