Sustainable eco-friendly sub-micron NaCl crystal powder-assisted method to synthesize SiOx/C as anode materials originated from rice husk for lithium-ion batteries
Se Hun Lee, Youngseul cho, Young Pyo Jeon, Yujin Chang, Kyu Sang Lee, Dongpyo Hong, Ok Sung Jeon, Yongyeol Park, Hyun Seo Yang, Young Joon Yoo, Sang Yoon Park, Yuanzhe Piao
EcoMat, 5(11), e12401(2023)
DOI: 10.1002/eom2.12401
Abstract
In the present study, we produced SiOx/C from rice husk by the NaCl sub-micron crystal-assisted synthesis method which can mitigate environmental degradation and hazards, simplify preparation, and improve electrochemical performance. During synthesis, NaCl induces catalytic graphitization, carbon activation, and amorphous silica formation. Moreover, it is only partially consumed and can be recrystallized and reused indefinitely. Our NaCl sub-micron crystal powder-assisted method created lithium-ion batteries (LIBs) with rice husk-derived SiOx/C anodes that exhibited a high initial charge/discharge capacity of 422.05/915.93 mAhg1 at 0.05 Ag1 current density and stable cycling performance. In addition, the SiOx/C electrode produced by the NaCl micro-crystal method had 333.96 mAhg1 capacity at 0.05 Ag1 current density. By contrast, bare rice husk electrode exhibited a lower capacity of 333.96 mAhg1 at the same condition.