Azobenzene mesogens mediated preparation of SnS nanocrystals encapsulated with in-situ N-doped carbon and their enhanced electrochemical performance for lithium ion batteries application

doi:10.1088/1674-1056/25/9/096102

中国物理B ›› 2016, Vol. 25 ›› Issue (9): 96102-096102.doi: 10.1088/1674-1056/25/9/096102

• SPECIAL TOPIC—Physical research in liquid crystal • 上一篇下一篇

Azobenzene mesogens mediated preparation of SnS nanocrystals encapsulated with in-situ N-doped carbon and their enhanced electrochemical performance for lithium ion batteries application

Meng Wang(王勐), Yang Zhou(周旸), Junfei Duan(段军飞), Dongzhong Chen(谌东中)

1. Department of Polymer Science and Engineering, Key Laboratory of High Performance Polymer Materials and Technology of Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China;
2. Department of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410076, China

收稿日期:2016-06-01 出版日期:2016-09-05 发布日期:2016-09-05
通讯作者: Junfei Duan, Dongzhong Chen E-mail:junfei_duan@yahoo.com;cdz@nju.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 21574062) and the Huaian High-Technology Research Institute of Nanjing University, China (Grant No. 2011Q1).

Azobenzene mesogens mediated preparation of SnS nanocrystals encapsulated with in-situ N-doped carbon and their enhanced electrochemical performance for lithium ion batteries application

Meng Wang(王勐)¹, Yang Zhou(周旸)¹, Junfei Duan(段军飞)², Dongzhong Chen(谌东中)¹

1. Department of Polymer Science and Engineering, Key Laboratory of High Performance Polymer Materials and Technology of Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China;
2. Department of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410076, China

Received:2016-06-01 Online:2016-09-05 Published:2016-09-05
Contact: Junfei Duan, Dongzhong Chen E-mail:junfei_duan@yahoo.com;cdz@nju.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 21574062) and the Huaian High-Technology Research Institute of Nanjing University, China (Grant No. 2011Q1).

摘要/Abstract

摘要： In this work, azobenzene mesogen-containing tin thiolates have been synthesized, which possess ordered lamellar structures persistent to higher temperature and serve as liquid crystalline precursors. Based on the preorganized tin thiolate precursors, SnS nanocrystals encapsulated with in-situ N-doped carbon layer have been achieved through a simple solventless pyrolysis process with the azobenzene mesogenic thiolate precursor served as Sn, S, N, and C sources simultaneously. Thus prepared nanocomposite materials as anode of lithium ion batteries present a large specific capacity of 604.6 mAh·g^-1 at a current density of 100 mA·g^-1, keeping a high capacity retention up to 96% after 80 cycles, and display high rate capability due to the synergistic effect of well-dispersed SnS nanocrystals and N-doped carbon layer. Such encouraging results shed a light on the controlled preparation of advanced nanocomposites based on liquid crystalline metallomesogen precursors and may boost their novel intriguing applications.

关键词: azobenzene-containing tin thiolates, liquid crystalline precursor, controlled synthesis, in-situ N-doped

Abstract: In this work, azobenzene mesogen-containing tin thiolates have been synthesized, which possess ordered lamellar structures persistent to higher temperature and serve as liquid crystalline precursors. Based on the preorganized tin thiolate precursors, SnS nanocrystals encapsulated with in-situ N-doped carbon layer have been achieved through a simple solventless pyrolysis process with the azobenzene mesogenic thiolate precursor served as Sn, S, N, and C sources simultaneously. Thus prepared nanocomposite materials as anode of lithium ion batteries present a large specific capacity of 604.6 mAh·g^-1 at a current density of 100 mA·g^-1, keeping a high capacity retention up to 96% after 80 cycles, and display high rate capability due to the synergistic effect of well-dispersed SnS nanocrystals and N-doped carbon layer. Such encouraging results shed a light on the controlled preparation of advanced nanocomposites based on liquid crystalline metallomesogen precursors and may boost their novel intriguing applications.

Key words: azobenzene-containing tin thiolates, liquid crystalline precursor, controlled synthesis, in-situ N-doped

中图分类号: (Liquid crystals)

61.30.-v

81.07.Bc (Nanocrystalline materials) 82.47.Aa (Lithium-ion batteries)

王勐, 周旸, 段军飞, 谌东中. Azobenzene mesogens mediated preparation of SnS nanocrystals encapsulated with in-situ N-doped carbon and their enhanced electrochemical performance for lithium ion batteries application[J]. 中国物理B, 2016, 25(9): 96102-096102.

Meng Wang(王勐), Yang Zhou(周旸), Junfei Duan(段军飞), Dongzhong Chen(谌东中). Azobenzene mesogens mediated preparation of SnS nanocrystals encapsulated with in-situ N-doped carbon and their enhanced electrochemical performance for lithium ion batteries application[J]. Chin. Phys. B, 2016, 25(9): 96102-096102.

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Azobenzene mesogens mediated preparation of SnS nanocrystals encapsulated with in-situ N-doped carbon and their enhanced electrochemical performance for lithium ion batteries application

Azobenzene mesogens mediated preparation of SnS nanocrystals encapsulated with in-situ N-doped carbon and their enhanced electrochemical performance for lithium ion batteries application

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