Lu Hao1; Wang Junyang1; Liu Bonan2; Chu Geng3; Zhou Ge1; Luo Fei4; Zheng Jieyun1; Yu Xiqian1; Li Hong1
Source Publicationchinesephysicsb
AbstractSilicon monoxide (SiO) has been considered as one of the most promising anode materials for next generation highenergy- density Li-ion batteries (LiBs) thanks to its high theoretical capacity. However, the poor intrinsic electronic conductivity and large volume change during lithium intercalation/de-intercalation restrict its practical applications. Fabrication of SiO/C composites is an effective way to overcome these problems. Herein, a series of micro-sized SiO@C/graphite (SiO@C/G) composite anode materials, with designed capacity of 600 mAh·g~(–1), are successfully prepared through a pitch pyrolysis reaction method. The electrochemical performance of SiO@C/G composite anodes with different carbon coating contents of 5 wt%, 10 wt%, 15 wt%, and 35 wt% is investigated. The results show that the SiO@C/G composite with 15-wt% carbon coating content exhibits the best cycle performance, with a high capacity retention of 90.7% at 25 °C and 90.1% at 45 °C after 100 cycles in full cells with LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2 as cathodes. The scanning electron microscope (SEM) and electrochemistry impedance spectroscopy (EIS) results suggest that a moderate carbon coating layer can promote the formation of stable SEI film, which is favorable for maintaining good interfacial conductivity and thus enhancing the cycling stability of SiO electrode.
Document Type期刊论文
4.Tianmulake Excellent Anode Materials Co., Ltd.
Recommended Citation
GB/T 7714
Lu Hao,Wang Junyang,Liu Bonan,et al. influenceofcarboncoatingontheelectrochemicalperformanceofsiocgraphitecompositeanodematerials[J]. chinesephysicsb,2019,28(6).
APA Lu Hao.,Wang Junyang.,Liu Bonan.,Chu Geng.,Zhou Ge.,...&Li Hong.(2019).influenceofcarboncoatingontheelectrochemicalperformanceofsiocgraphitecompositeanodematerials.chinesephysicsb,28(6).
MLA Lu Hao,et al."influenceofcarboncoatingontheelectrochemicalperformanceofsiocgraphitecompositeanodematerials".chinesephysicsb 28.6(2019).
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