Abstract
The safety issues caused by lithium-ion battery (LIB) failures are the pain points that constrain the development of LIB. Developing a high sensitivity and low-cost gas sensor targeting trace electrolyte vapors, such as methyl ethyl carbonate (EMC), can help achieve early warning in accidents. Tin dioxide (SnO2) has always been one of the most widely used gas sensitive materials. Herein, the concave octahedral hollow SnO2 nanocages (SnO2-Hoc) are quickly prepared by template-engaged coordinating etching. The response value of its sensor to 10 ppm EMC is 7.24 at 140℃ and it shows sufficient sensitivity in LIB leakage simulation tests. The hollow concave octahedral structure promotes the EMC diffusion, and the lower energy barrier of EMC cleavage is the key to selective response. Overall, this work synthesized SnO2-Hoc sensor to directly detect trace EMC, which is expected to provide new guarantees for the LIB safe application.
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