In situ one-pot synthesis of Sn/lignite-based porous carbon composite for enhanced lithium storage

Junsheng Zhu; Zhaoqi Zhang; Xiaobo Ding; Jing-Pei Cao; Guangzhou Hu

doi:10.1016/j.jcis.2020.12.030

In situ one-pot synthesis of Sn/lignite-based porous carbon composite for enhanced lithium storage

J Colloid Interface Sci. 2021 Apr:587:367-375. doi: 10.1016/j.jcis.2020.12.030. Epub 2020 Dec 17.

Authors

Junsheng Zhu¹, Zhaoqi Zhang², Xiaobo Ding², Jing-Pei Cao³, Guangzhou Hu²

Affiliations

¹ School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China. Electronic address: zhujschina@163.com.
² School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China.
³ School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China. Electronic address: caojingpei@cumt.edu.cn.

PMID: 33360906
DOI: 10.1016/j.jcis.2020.12.030

Abstract

To expand the variety of Sn/C composites, lignite-based porous carbon was initially prepared with Baoqing lignite as the raw material and K₂CO₃ as the extractant and activator. A novel Sn/lignite-based porous carbon composite was subsequently fabricated via an in situ one-pot synthesis method. In the nanocomposite, Sn nanoparticles are uniformly distributed on lignite-based porous carbon, improving the lithium-ion storage performance of the as-prepared material. Compared with pure Sn and bare lignite-based porous carbon, Sn/lignite-based porous carbon displayed a superior electrochemical performance. The composite material exhibits a high reversible capacity of 941 mAh g^-1 after 200 cycles at 100 mA g^-1. Even after 800 charge/discharge cycles at a high current density of 1000 mA g^-1, the nanocomposite retains a reversible capacity of 573 mAh g^-1. The enhanced lithium-ion storage performance can be attributed to the combined effect of Sn and lignite-based porous carbon.

Keywords: Lignite–based porous carbon; Lithium–ion battery; Nanocomposite; Sn.