Water-based dual-network conductive polymer binders for high-performance Li-S batteries

Wang, Hui1,4; Wang, Yinyan1; Zhang, Guangzhao3; Yang, Zhuohong2; Chen, Yukun4; Deng, Yonghong3; Yang, Yu2; Wang, Chaoyang1

2021-03-01

10.1016/j.electacta.2021.137822

ELECTROCHIMICA ACTA   影响因子和分区

0013-4686

1873-3859

Binder is an essential component in the typical Li-S batteries. It plays a critical role in maintaining the structural integrity of electrodes and ensuring the effective connection between active materials and conductive agents. However, the existing commercial binders are not promising enough for the commercial Li-S battery construction; there are still rooms for improvement in terms of their bonding strength, conductivity, and affinity to the soluble polysulfide intermediates. Herein, the fabrication of a novel dual-network conductive (DNC) binder is reported. This as-developed binder consists of a conductive network (composed of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(styrenesulfonate) (PSS)), and a crosslinking absorbing network composed of phosphorylated soy protein isolate (P-SPI), polyethylene oxide (PEO), and phytic acid (PA), demonstrating an excellent conductivity and polysulfide adsorption capability. Functions of different binder components are also investigated via detailed properties analysis and molecular dynamics simulations, which manifests an optimum prescription of the two networks. Remarkably, the DNC binder-based Li-S batteries with a sulfur loading of similar to 1.7 mg cm(-2) possess an excellent long-term stability , which has a high retention capacity of 751.9 mAh g(-1) after 400 cycles at 0.5 C with a coulombic efficiency of 99.57%. A good rate performance of 692.4 mAh g(-1) at 4 C under a sulfur loading of similar to 1.2 mg cm(-2) is also achieved. (C) 2021 Elsevier Ltd. All rights reserved.

Conductive polymer Crosslinking Binder Li-S battery

SCI ; EI

英语

其他

Science and Technology Program of Guangzhou[202002030307] ; Guangdong Basic and Applied Basic Research Foundation[2019A1515010595] ; Key-Area Research and Development Program of Guangdong Province[2019B090908001] ; Science and Technology Foundation of Guangdong Province[2020A0505100051] ; National Natural Science Foundation of China[21805127] ; Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001]

Electrochemistry

Electrochemistry

WOS:000620284600001

PERGAMON-ELSEVIER SCIENCE LTD

20210509856334

Binders ; Conducting polymers ; Lithium compounds ; Molecular dynamics ; Polyethylene oxides ; Polysulfides

Physical Chemistry:801.4 ; Chemical Agents and Basic Industrial Chemicals:803 ; Polymeric Materials:815.1 ; Organic Polymers:815.1.1

CHEMISTRY

Web of Science

1.South China Univ Technol, Res Inst Mat Sci, Guangzhou 510640, Peoples R China
2.South China Agr Univ, Coll Mat & Energy, Key Lab Biobased Mat & Energy, Minist Educ, Guangzhou 510642, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Peoples R China
4.South China Univ Technol, Lab Adv Elastomer, Guangzhou 510640, Peoples R China

Wang, Hui,Wang, Yinyan,Zhang, Guangzhao,et al. Water-based dual-network conductive polymer binders for high-performance Li-S batteries[J]. ELECTROCHIMICA ACTA,2021,371.

Wang, Hui.,Wang, Yinyan.,Zhang, Guangzhao.,Yang, Zhuohong.,Chen, Yukun.,...&Wang, Chaoyang.(2021).Water-based dual-network conductive polymer binders for high-performance Li-S batteries.ELECTROCHIMICA ACTA,371.

Wang, Hui,et al."Water-based dual-network conductive polymer binders for high-performance Li-S batteries".ELECTROCHIMICA ACTA 371(2021).