Enhanced cyclability of sulfur cathodes in lithium-sulfur batteries with Na-alginate as a binder

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (5): 790-794.

Enhanced cyclability of sulfur cathodes in lithium-sulfur batteries with Na-alginate as a binder

Weizhai Bao^a, Zhian Zhang^a,b, Yongqing Gan^a, Xiwen Wang^a, Jie Lia^b

a. School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China;
b. Engineering Research Center of High Performance Battery Materials and Devices, Research Institute of Central South University in Shenzhen, Shenzhen 518057, Guangdong, China

收稿日期:2013-07-04 修回日期:2013-08-12 出版日期:2013-09-20 发布日期:2013-09-30
通讯作者: Zhian Zhang
基金资助:
This work was supported by the Strategic Emerging Industries Program of Shenzhen, China (JCYJ20120618164543322) and the National Natural Science Foundation of China (20803095).

Enhanced cyclability of sulfur cathodes in lithium-sulfur batteries with Na-alginate as a binder

Weizhai Bao^a, Zhian Zhang^a,b, Yongqing Gan^a, Xiwen Wang^a, Jie Lia^b

a. School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China;
b. Engineering Research Center of High Performance Battery Materials and Devices, Research Institute of Central South University in Shenzhen, Shenzhen 518057, Guangdong, China

Received:2013-07-04 Revised:2013-08-12 Online:2013-09-20 Published:2013-09-30
Supported by:
This work was supported by the Strategic Emerging Industries Program of Shenzhen, China (JCYJ20120618164543322) and the National Natural Science Foundation of China (20803095).

摘要/Abstract

摘要： Na-alginate as a binder in an aqueous solvent has been applied in the preparation of sulfur cathodes for lithium-sulfur batteries. Their electrochemical performances have been investigated by a charge-discharge cycle test and electrochemical impedance spectroscopy (EIS). The EIS tests indicated that the alginate sulfur cathode had lower resistance and better kinetic characteristics than those of the poly(vinylidene fluoride) (PVDF) sulfur cathode using PVDF as a binder in a N-methy-2-pyrrolidone (NMP) solvent. The charge-discharge tests showed that the discharge capacity and the capacity retention rate of Na-alginate sulfur cathode were 508 mAh·g^-1 and 65.4% at the 50th cycle with a current density of 335 mA·g^-1. Compared with PVDF sulfur cathode, the alginate sulfur cathode showed a remarkably better cycle performance. These results show that the alginate binder has promising potential for lithium-sulfur battery applications.

关键词: lithium-sulfur battery, binder, Na-alginate, electrochemical performance

Abstract: Na-alginate as a binder in an aqueous solvent has been applied in the preparation of sulfur cathodes for lithium-sulfur batteries. Their electrochemical performances have been investigated by a charge-discharge cycle test and electrochemical impedance spectroscopy (EIS). The EIS tests indicated that the alginate sulfur cathode had lower resistance and better kinetic characteristics than those of the poly(vinylidene fluoride) (PVDF) sulfur cathode using PVDF as a binder in a N-methy-2-pyrrolidone (NMP) solvent. The charge-discharge tests showed that the discharge capacity and the capacity retention rate of Na-alginate sulfur cathode were 508 mAh·g^-1 and 65.4% at the 50th cycle with a current density of 335 mA·g^-1. Compared with PVDF sulfur cathode, the alginate sulfur cathode showed a remarkably better cycle performance. These results show that the alginate binder has promising potential for lithium-sulfur battery applications.

Key words: lithium-sulfur battery, binder, Na-alginate, electrochemical performance

Weizhai Bao, Zhian Zhang, Yongqing Gan, Xiwen Wang, Jie Lia. Enhanced cyclability of sulfur cathodes in lithium-sulfur batteries with Na-alginate as a binder[J]. 能源化学(英文), 2013, 22(5): 790-794.

Weizhai Bao, Zhian Zhang, Yongqing Gan, Xiwen Wang, Jie Lia. Enhanced cyclability of sulfur cathodes in lithium-sulfur batteries with Na-alginate as a binder[J]. Journal of Energy Chemistry, 2013, 22(5): 790-794.

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Enhanced cyclability of sulfur cathodes in lithium-sulfur batteries with Na-alginate as a binder

Enhanced cyclability of sulfur cathodes in lithium-sulfur batteries with Na-alginate as a binder

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