Mechanistic Understanding of Metal Phosphide Host for Sulfur Cathode in High-Energy-Density Lithium-Sulfur Batteries
作者:Shen, JD (Shen, Jiadong)[ 1,2 ] ; Xu, XJ (Xu, Xijun)[ 1,2 ] ; Liu, J (Liu, Jun)[ 1,2 ] ; Liu, ZB (Liu, Zhengbo)[ 1,2 ] ; Li, FK (Li, Fangkun)[ 1,2 ] ; Hu, RZ (Hu, Renzong)[ 1,2 ] ; Liu, JW (Liu, Jiangwen)[ 1,2 ] ; Hou, XH (Hou, Xianhua)[ 4 ] ; Feng, YZ (Feng, Yuezhan)[ 5 ] ; Yu, Y (Yu, Yan)[ 3,6 ] ...更多内容
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ACS NANO
卷: 13 期: 8 页: 8986-8996
DOI: 10.1021/acsnano.9b02903
出版年: AUG 2019
文献类型:Article
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摘要
For solving the drawbacks of low conductivity and the shuttle effect in a sulfur cathode, various nonpolar carbon and polar metal compounds with strong chemical absorption ability are applied as sulfur host materials for lithium sulfur (Li-S) batteries. Nevertheless, previous research simply attributed the performance improvement of sulfur cathodes to the chemical adsorption ability of polar metal compounds toward lithium polysulfides (LPS), while a deep understanding of the enhanced electrochemical performance in these various sulfur hosts, especially at the molecular levels, is still unclear. Herein, for a mechanistic understanding of superior metal phosphide host in Li-S battery chemistry, an integrated phosphide-based host of CF/FePRC (carbon cloth with grown FeP@C nanotube arrays) is chosen as the model, and this binder-free cathode can exclude interference from the binder and conductive additives. With a systematic electrochemical investigation of the loading sulfur in such oxide-and phosphide-based hosts (CF/Fe3O4@C and CF/FeP@C), it is found that CF/FeP@C@S shows much superior Li-S performances. The greatly enhanced performance of CF/FeP@C@S suggests that FeP can well suppress the shuttle effect of LPS and accelerate their transformation during the charge discharge process. The first-principles calculations reveal the performance variations of Fe3O4 and FeP in Li-S batteries mainly because the shifts of the p band of the FeP could accelerate the interfacial electronics transfer dynamics by increasing the electronic concentration in the Fermi level of adsorbed Li2S4. The current work sheds light on the promising design of superior Li-S batteries from both theoretical and experimental aspects.
关键词
作者关键词:Li-S batteries; sulfur cathode; flexible electrode; metal phosphide; mechanistic understanding
KeyWords Plus:GRAPHENE OXIDE; TUBE
作者信息
通讯作者地址: Liu, J; Zhu, M (通讯作者)
显示更多South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China.
通讯作者地址: Liu, J; Zhu, M (通讯作者)
显示更多South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China.
通讯作者地址: Yu, Y (通讯作者)
显示更多Univ Sci & Technol China, Chinese Acad Sci, Dept Mat Sci & Engn, Hefei Natl Lab Phys Sci Microscale,Key Lab Mat En, Hefei 230026, Anhui, Peoples R China.
通讯作者地址: Yu, Y (通讯作者)
显示更多Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China.
地址:
显示更多[ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China
显示更多[ 2 ] South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China
显示更多[ 3 ] Univ Sci & Technol China, Chinese Acad Sci, Dept Mat Sci & Engn, Hefei Natl Lab Phys Sci Microscale,Key Lab Mat En, Hefei 230026, Anhui, Peoples R China
显示更多[ 4 ] South China Normal Univ, Sch Phys & Telecommun Engn, Guangdong Prov Key Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Guangdong, Peoples R China
显示更多[ 5 ] Zhengzhou Univ, Key Lab Mat Proc & Mold, Minist Educ, Zhengzhou 450002, Henan, Peoples R China
显示更多[ 6 ] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
电子邮件地址:msjliu@scut.edu.cn; yanyumse@ustc.edu.cn; memzhu@scut.edu.cn
基金资助致谢
基金资助机构授权号
National Key R&D Research Program of China
2018YFB0905400
National Natural Science Foundation of China
51771076
51622210
51872277
DNL Cooperation Fund, CAS
DNL180310
Innovative Research Groups of the National Natural Science Foundation of China
NSFC51621001
1000 Plan from the Chinese Government
Guangdong Pearl River Talents Plan
2017GC010218
Guangzhou Science and Technology Plan Projects
201804010104
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出版商
AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
期刊信息
Impact Factor (影响因子): Journal Citation Reports
类别 / 分类
研究方向:Chemistry; Science & Technology - Other Topics; Materials Science
Web of Science 类别:Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary