@article{Li2020, 
author = {Zhaolin Li and Hailei Zhao and Jie Wang and Tianhou Zhang and Boyang Fu and Zijia Zhang and Xin Tao},
title = {Rational structure design to realize high-performance SiOx@C anode material for lithium ion batteries},
year = {2020},
journal = {Nano Research},
volume = {13},
number = {2},
pages = {527-532},
keywords = {anode, mesoporous structure, lithium ion batteries, electrochemical properties, silicon suboxide},
url = {https://www.sciopen.com/article/10.1007/s12274-020-2644-9},
doi = {10.1007/s12274-020-2644-9},
abstract = {Silicon suboxide (SiOx) is considered to be one of the most promising materials for next-generation anode due to its high energy density. For its preparation, the wet-chemistry method is a cost-effective and readily scalable route, while the so-derived SiOx usually shows lower capacity compared with that prepared by high temperature-vacuum evaporation route. Herein, we present an elaborate particle structure design to realize the wet-chemistry preparation of a high-performance SiOx/C nanocomposite. Dandelion-like highly porous SiOx particle coated with conformal carbon layer is designed and prepared. The highly-porous SiOx skeleton provides plenty specific surface for intimate contact with carbon layer to allow a deep reduction of SiOx to a low O/Si ratio at relatively low temperature (700 °C), enabling a high specific capacity. The abundant mesoscale voids effectively accommodate the volume variation of SiOx skeleton, ensuring the high structural stability of SiOx@C during lithiation/delithiation process. Meanwhile, the three-dimensional (3D) conformal carbon layer provides a fast electron/ion transportation, allowing an enhanced electrode reaction kinetics. Owing to the optimized O/Si ratio and well-engineered structure, the prepared SiOx@C electrode delivers an ultra-high capacity (1,115.8 mAh·g-1 at 0.1 A·g-1 after 200 cycles) and ultra-long lifespan (635 mAh·g-1 at 2 A·g-1 after 1,000 cycles). To the best of our knowledge, the achieved combination of ultra-high specific capacity and ultra-long cycling life is unprecedented.}
}