Sub-100 nm hollow SnO_2@C nanoparticles as anode material for lithium ion batteries and significantl

• 作 者: Shuang-Lei Yang Bang-Hong Zhou Mei Lei Lan-Ping Huang Jun Pan Wei Wu Hong-Bo Zhang
• 机 构: State Key Laboratory for Powder Metallurgy, Central South University,Laboratory of Printable Functio
• 出 处: Chinese Chemical Letters
• 发表日期: 2015年10期
• 关键词: hollow lithium anode facile battery hydrothermal cycle coated recovered Rational

Rational designing and controlling of nanostructures is a key factor in realizing appropriate properties required for the high-performance energy fields. In the present study, hollow Sn O2@C nanoparticles(NPs) with a mean size of 50 nm have been synthesized in large-scale via a facile hydrothermal approach.The morphology and composition of as-obtained products were studied by various characterized techniques. As an anode material for lithium ion batteries(LIBs), the as-prepared hollow Sn O2@C NPs exhibit significant improvement in cycle performances. The discharge capacity of lithium battery is as high as 370 m Ah g 1, and the current density is 3910 m A g 1(5 C) after 573 cycles. Furthermore, the capacity recovers up to 1100 m Ah g 1at the rate performances in which the current density is recovered to 156.4 m A g 1(0.2 C). Undoubtedly, sub-100 nm Sn O2@C NPs provide significant improvement to the electrochemical performance of LIBs as superior-anode nanomaterials, and this carbon coating strategy can pave the way for developing high-performance LIBs.

Rational designing and controlling of nanostructures is a key factor in realizing appropriate properties required for the high-performance energy fields. In the present study, hollow Sn O2 @ C nanoparticles (NPs) with a mean size of 50 nm have been synthesized in large- scale via a facile hydrothermal approach. The morphology and composition of as-obtained products were studied by various characterized techniques. As an anode material for lithium ion batteries (LIBs), the as-prepared hollow Sn O2 @ C NPs exhibit significant improvement in cycle performances. The discharge capacity of lithium battery is as high as 370 m Ah g 1, and the current density is 3910 m A g 1 (5 C) after 573 cycles. performances in which the current density is recovered to 156.4 m A g 1 (0.2 C). Undoubtedly, sub-100 nm Sn O 2 @ C NPs provide significant improvement to the electrochemical performance of LIBs as superior-anode nanomaterials, and this carbon coat ing strategy can pave the way for developing high-performance LIBs.