In-Situ Synthesis of Carbon-Encapsulated Atomic Cobalt as Highly Efficient Polysulfide Electrocatalysts for Highly Stable Lithium-Sulfur Batteries

时间:2022-04-13作者:浏览量:700


In-Situ Synthesis of Carbon-Encapsulated Atomic Cobalt as Highly Efficient Polysulfide Electrocatalysts for Highly Stable Lithium-Sulfur Batteries

作者:

Wang, ZS (Wang, Zhuosen) [1] , [2] ; Shen, JD (Shen, Jiadong) [2] ; Xu, XJ (Xu, Xijun) [2] ; Yuan, JJ (Yuan, Jujun) [3] ; Zuo, SY (Zuo, Shiyong) [2] ; Liu, ZB (Liu, Zhengbo) [2] ; Zhang, DC (Zhang, Dechao) [2] ; Liu, J (Liu, Jun) [2] , [3]

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文献号2106640

DOI10.1002/smll.202106640

在线发表FEB 2022

已索引2022-02-28

文献类型Article; Early Access

摘要

Lithium-sulfur (Li-S) batteries have been considered as one of the most promising electrochemical energy storage systems because of their high energy density. However, a series of issues severely limit the practical performances of Li-S batteries such as low conductivity, significant volume change, and shuttle effect. The hollow carbon spheres with huge voids and high electrical conductivity are promising as sulfur hosts. Unfortunately, the nonpolar nature of carbon materials cannot prevent the shuttle effect effectively. In this case, the atomic cobalt is introduced to a nitrogen-doped hollow carbon sphere (ACo@HCS) through polymerization and controlled pyrolysis. The atomic cobalt dopants not only act as active sites to restrict the shuttle effect, but also can promote the kinetics of the sulfur redox reactions. ACo@HCS acting as sulfur host exhibits a high discharge capacity (1003 mAh g(-1)) at a 1.0 C rate after 500 cycles, and the corresponding decay rate is as low as 0.002% per cycle. This exciting work paves a new way to design high-performance Li-S batteries.


关键词

作者关键词atomic catalystscarbon-encapsulationcathodeskineticsLi-S batteries

Keywords PlusN-DOPED CARBONGRAPHENEPOWER

作者信息

通讯作者地址

Liu, Jun

(通讯作者)

South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China

通讯作者地址

Yuan, Jujun;

Liu, Jun

(通讯作者)

Gannan Normal Univ, Sch Phys & Elect, Ganzhou 341000, Peoples R China

地址

1 Zhengzhou Univ, Henan Inst Adv Technol, Zhengzhou 450052, Peoples R China

2 South China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China

3 Gannan Normal Univ, Sch Phys & Elect, Ganzhou 341000, Peoples R China

电子邮件地址yuanjujun@gnnu.edu.cnmsjliu@scut.edu.cn

类别/分类

研究方向ChemistryScience & Technology - Other TopicsMaterials SciencePhysics