期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 30, 页码 14903-14909出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta03987a
关键词
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资金
- National Key Research and development program of China [2018FYB0104202, 2016YFA0202603]
- National Natural Science Foundation of China [21673171, 51502226]
- Programme of Introducing Talents of Discipline to Universities [B17034]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
The application of silicon oxide (SiOx)-based anode materials in lithium-ion batteries is hampered by their low conductivity and large volume expansion. To tackle both issues, ultrafine SiOx/C composite nanospheres with a uniform diameter of similar to 40 nm were fabricated through a tri-component co-assembly approach. The ultrafine SiOx/C nanospheres demonstrated a high specific capacity of 895 mA h g(-1) after 200 cycles at 200 mA g(-1). At a high current density of 1 A g(-1), a capacity of 828 mA h g(-1 )could be achieved after 1000 cycles. The ultrafine SiOx/C nanospheres were further assembled into pomegranate-like assemblies through spray drying. The resultant pomegranate-like structure manifested a discharge capacity of 1024 mA h g(-1 )after 200 cycles at 500 mA g(-1).
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