Nitrogen and iron codoped porous carbon polyhedra for effectively confining polysulfides and efficiently catalyzing their conversion in lithium-sulfur batteries

时间:2020-12-10作者:浏览量:234


Nitrogen and iron codoped porous carbon polyhedra for effectively confining polysulfides and efficiently catalyzing their conversion in lithium-sulfur batteries

作者:Yu, JP (Yu, Jingping)[ 1,2 ] ; Khan, SA (Khan, Shahzad Ahmad)[ 1 ] ; Zhao, DK (Zhao, Dengke)[ 1 ] ; Li, LG (Li, Ligui)[ 1,2,3 ] ; Wu, ZX (Wu, Zexing)[ 4 ] ; Niu, XJ (Niu, Xiaojun)[ 1,2 ] ; Chen, SW (Chen, Shaowei)[ 5 ]


SUSTAINABLE ENERGY & FUELS


卷: 4 期: 10 页: 5215-5222

DOI: 10.1039/d0se00942c


出版年: OCT 1 2020


文献类型:Article


摘要

Effectively confining lithium polysulfides (LiPSs) and efficiently catalyzing their conversion represent a judicious approach to the preparation of high-rate, long lifespan lithium-sulfur (Li-S) batteries. Herein, an Fe-containing zeolitic imidazolate framework Fe-ZIF-8 is used as a precursor to synthesize a Fe-N-C polyhedron composite that shows a high specific surface area of 1459.3 m(2)g(-1), a large pore volume of 1.037 cm(3)g(-1)and a high nitrogen content of 7.29 at%. Benefiting from the high surface area and polarity of the carbon matrix, the Fe-N-C polyhedron composite can effectively adsorb and confine LiPSs. The S@Fe-N-C based electrode with a high sulfur loading of 72 wt% shows a high initial specific capacity of 1296 mA h g(-1)at 0.1C and can retain a capacity of 450 mA h g(-1)after 500 charge-discharge cycles at 1C, corresponding to a low fading rate of 0.068% per cycle. In contrast, a low capacity of 345 mA h g(-1)is observed for the S@N-C reference electrode even after only 200 cycles. Moreover, the Fe-N-x-C(y)sites within the S@Fe-N-C electrode can also efficiently catalyze the redox conversion of LiPSs during the charge-discharge process, leading to a much higher reversible capacity of 1178 mA h g(-1)at 0.1C, as compared with the 626 mA h g(-1)for the S@N-C electrode. These results support the approach to the preparation of N-doped porous carbons with catalytically active M-N-x-C-y(M is transition metal) sites for high-rate, long-lifespan sulfur cathodes for Li-S batteries.


关键词

KeyWords Plus:N-C COMPOSITE; MICROPOROUS CARBON; FRAMEWORK; CATHODE; ANODE; ELECTROCATALYSTS; NANOSHEETS; NANOTUBES; MOLECULES; NANOFIBER


作者信息

通讯作者地址:


South China University of Technology South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Guangzhou Key Lab Surface Chem Energy Mat, New Energy Res Inst,Sch Environm & Energy, Guangzhou 510006, Peoples R China.

Guangdong University of Petrochemical Technology Guangdong Univ Petrochem Technol, Guangdong Prov Key Lab Petrochem Pollut Proc & Co, Guangzhou, Peoples R China.

South China University of Technology South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.

通讯作者地址: Li, LG (通讯作者)


显示更多South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Guangzhou Key Lab Surface Chem Energy Mat, New Energy Res Inst,Sch Environm & Energy, Guangzhou 510006, Peoples R China.

通讯作者地址: Li, LG (通讯作者)

显示更多Guangdong Univ Petrochem Technol, Guangdong Prov Key Lab Petrochem Pollut Proc & Co, Guangzhou, Peoples R China.

通讯作者地址: Li, LG (通讯作者)

显示更多South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China.

地址:


显示更多[ 1 ]‎ South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Guangzhou Key Lab Surface Chem Energy Mat, New Energy Res Inst,Sch Environm & Energy, Guangzhou 510006, Peoples R China

显示更多[ 2 ]‎ Guangdong Univ Petrochem Technol, Guangdong Prov Key Lab Petrochem Pollut Proc & Co, Guangzhou, Peoples R China

显示更多[ 3 ]‎ South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Peoples R China

显示更多[ 4 ]‎ Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, State Key Lab Base Ecochem Engn, 53 Zhengzhou Rd, Qingdao 266042, Peoples R China

显示更多[ 5 ]‎ Univ Calif Santa Cruz, Dept Chem & Biochem, 1156 High St, Santa Cruz, CA 95064 USA

电子邮件地址:esguili@scut.edu.cn


基金资助致谢

基金资助机构显示详情授权号

National Natural Science Foundation of China (NSFC)


NSFC 51402111

Open Fund of Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, Guangdong University of Petrochemical Technology

2018B030322017

Open Fund of the Guangdong Provincial Key Laboratory of Advance Energy Storage Materials  

Fundamental Research, and the Funds for the Central Universities (SCUT Grant)

2018ZD21

查看基金资助信息   

出版商

ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND


期刊信息

Impact Factor (影响因子): Journal Citation Reports

类别 / 分类

研究方向:Chemistry; Energy & Fuels; Materials Science


Web of Science 类别:Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary