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Long-Term Stable Hollowed Silicon for Li-Ion Batteries Based on an Improved Low-Temperature Molten Salt Strategy.

ABSTRACT: Nanostructured hollow silicon has attracted tremendous attention as high-performance anode materials in Li-ion battery applications. However, the large-scale production of pure hollowed silicon with long cycling stability is still a great challenge. Here, we report an improved low-temperature molten salt strategy to synthesize nanosized hollowed silicon with a stable structure on a large scale. As an anode material for rechargeable lithium-ion batteries, it exhibits a high capacity, excellent long cycling, and steady rate performance at different current densities. Especially, a high reversible capacity of 2028.6 mA h g-1 at 0.5 A g-1 after 150 cycles, 994.3 mA h g-1 at 3 A g-1 after 500 cycles, and 538.8 mAh g-1 at 5 A g-1 after 1200 cycles could be obtained. This kind of nanosized hollowed silicon can be applied as a basic anode material in silicon-based composites for long-term stable Li-ion battery applications.

SUBMITTER: Li X

PROVIDER: S-EPMC7594121 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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Long-Term Stable Hollowed Silicon for Li-Ion Batteries Based on an Improved Low-Temperature Molten Salt Strategy.

Li Xinxi X Zheng Binghe B Liu Long L Zhang Guoqing G Liu Zhongyun Z Luo Wen W

ACS omega 20201012 42

Nanostructured hollow silicon has attracted tremendous attention as high-performance anode materials in Li-ion battery applications. However, the large-scale production of pure hollowed silicon with long cycling stability is still a great challenge. Here, we report an improved low-temperature molten salt strategy to synthesize nanosized hollowed silicon with a stable structure on a large scale. As an anode material for rechargeable lithium-ion batteries, it exhibits a high capacity, excellent lo ...[more]

PMID: 33134699

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