title: Ultrasmall Sn nanoparticles embedded in nitrogen-doped porous carbon as high-performance anode for lithium-ion batteries.
abstract: In this Letter, we reported on the preparation and Li-ion battery anode application of ultrasmall Sn nanoparticles (∼5 nm) embedded in nitrogen-doped porous carbon network (denoted as 5-Sn/C). Pyrolysis of Sn(Salen) at 650 °C under Ar atmosphere was carried out to prepare N-doped porous 5-Sn/C with the BET specific surface area of 286.3 m(2) g(-1). The 5-Sn/C showed an initial discharge capacity of 1014 mAh g(-1) and a capacity retention of 722 mAh g(-1) after 200 cycles at the current density of 0.2 A g(-1). Furthermore, a reversible capacity of ∼480 mAh g(-1) was obtained at much higher current density of 5 A g(-1). The remarkable electrochemical performance of 5-Sn/C was attributed to the effective combination of ultrasmall Sn nanoparticles, uniform distribution, and porous carbon network structure, which simultaneously solved the major problems of pulverization, loss of electrical contact, and particle aggregation facing Sn anode.
authors: Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry; Collaborative Innovation Center of Chemical Science and Engineering, Nankai University , Tianjin 300071, China.
authors: Zhiqiang
authors: Z
authors: Zhu
authors: Shiwen
authors: S
authors: Wang
authors: Jing
authors: J
authors: Du
authors: Qi
authors: Q
authors: Jin
authors: Tianran
authors: T
authors: Zhang
authors: Fangyi
authors: F
authors: Cheng
authors: Jun
authors: J
authors: Chen