Amorphous Fe-Phytate Enables Fast Polysulfide Redox for High-Loading Lithium Sulfur Batteries

Zeng, Guangfeng1; Chen, Dongjiang2; Zhen, Cheng3; Feng, Chao4; Pang, Yashuai4; He, Weidong5

2023-06-01

10.1002/smll.202302548

SMALL   影响因子和分区

1613-6810

1613-6829

Utilizing catalysts to accelerate polysulfides conversion are of paramount importance to eliminate the shuttling effect and improve the practical performance of lithium-sulfur (Li-S) batteries. The amorphism, attributes to the abundant unsaturated surface active sites, has recently been recognized as a contribution to increase the activity of catalysts. However, the investigation on amorphous catalysts has received limited interest in lithium-sulfur batteries due to lack of understanding of their composition structure activity. Herein, a amorphous Fe-Phytate structure is proposed to enhance polysulfide conversion and suppress polysulfide shuttling by modifying polypropylene separator (C-Fe-Phytate@PP). The polar Fe-Phytate with distorted VI coordination Fe active centers strongly intake polysulfide electron by forming Fe-S bond to accelerate the polysulfide conversion. The surface mediated polysulfides redox gives rise to a higher exchange current in comparison with carbon. Furthermore, Fe-Phytate owns robust adsorption to polysulfide and effectively reduce the shuttling effect. With the C-Fe-Phytate@PP separator, the Li-S batteries exhibit an outstanding rate capability of 690 mAh g(-1) at 5 C and an ultrahigh areal capacity of 7.8 mAh cm(-2) even at a high sulfur loading of 7.3 mg cm(-2). The work provides a novel separator for facilitating the actual applications of Li-S batteries.

amorphous materials lithium-sulfur batteries polar Fe-O-P bond polysulfides conversion polysulfides trapping

SCI ; EI

英语

其他

Basic Ability Improvement Project of Young and middle aged Teachers in Guangxi Colleges[2023KY0600] ; high-level personnel Research Funds of Yulin Normal University[G2022ZK06] ; China Postdoctoral Science Foundation[2022M720651] ; Natural Science Foundation of Sichuan Province[2023NSFSC0992] ; Sichuan Province Innovative Talent Funding Project for Postdoctoral Fellows[BX202216]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001015544300001

WILEY-V C H VERLAG GMBH

20232614315117

Amorphous materials ; Catalyst activity ; Iron compounds ; Lithium batteries ; Lithium compounds ; Lithium sulfur batteries ; Polypropylenes ; Separators ; Sulfur compounds

Primary Batteries:702.1.1 ; Secondary Batteries:702.1.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Polymers:815.1.1 ; Synthetic Rubber:818.2.1 ; Amorphous Solids:933.2

Web of Science

1.Yulin Normal Univ, Collage Chem & Food Sci, Yulin 537000, Peoples R China
2.Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Device, Chengdu 610054, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Univ Elect Sci & Technol China, Sch Phys, Chengdu 610054, Peoples R China
5.Harbin Inst Technol, Ctr Composite Mat & Struct, Natl Key Lab Sci & Technol Adv Composites Special, Harbin 150080, Peoples R China

Zeng, Guangfeng,Chen, Dongjiang,Zhen, Cheng,et al. Amorphous Fe-Phytate Enables Fast Polysulfide Redox for High-Loading Lithium Sulfur Batteries[J]. SMALL,2023,19(43).

Zeng, Guangfeng,Chen, Dongjiang,Zhen, Cheng,Feng, Chao,Pang, Yashuai,&He, Weidong.(2023).Amorphous Fe-Phytate Enables Fast Polysulfide Redox for High-Loading Lithium Sulfur Batteries.SMALL,19(43).

Zeng, Guangfeng,et al."Amorphous Fe-Phytate Enables Fast Polysulfide Redox for High-Loading Lithium Sulfur Batteries".SMALL 19.43(2023).