Critical role of surface craters for improving the reversibility of Li metal storage in porous carbon frameworks

被引:17
作者
Choi, Seung Hyun [1 ]
Hyeon, Yuhwan [2 ,3 ,4 ]
Shin, Hong Rim
Eom, Gwang Hyeon [1 ]
Pham, Hien Thi Thu [1 ]
Whang, Dongmok [3 ,4 ]
Kim, So Yeun
Lee, Jong-Won [5 ]
Kim, Jung Ho [2 ]
Park, Min-Sik [1 ]
机构
[1] Kyung Hee Univ, Integrated Educ Program Frontier Mat BK21 Four, Dept Adv Mat Engn Informat & Elect, 1732 Deogyeong Daero, Yongin 17104, South Korea
[2] Univ Wollongong, Australian Inst Innovat Mat AIIM, Inst Superconducting & Elect Mat ISEM, Wollongong, NSW 2500, Australia
[3] Sungkyunkwan Univ SKKU, SKKU Adv Inst Nanotechnol SAINT, Suwon 16419, South Korea
[4] Sungkyunkwan Univ SKKU, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea
[5] Daegu Gyeongbuk Inst Sci & Technol DGIST, Dept Energy Sci & Engn, 333 Techno Jungang Daero, Daegu 42988, South Korea
基金
新加坡国家研究基金会;
关键词
Lithium metal batteries; Porous host materials; Mesopores; Coulombic efficiency; Mass transport; LITHIUM; ANODE; ENERGY; ELECTROLYTE; INTERPHASE; LAYER; HOST;
D O I
10.1016/j.nanoen.2021.106243
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Recently, a certain type of porous carbon framework (PCF) based on zeolitic imidazolate frameworks (ZIFs) has been proposed as a promising anode material for metallic Li storage owing to its controllable pore structure and functionality. With the purpose of improving the Li storage capability and reversibility, meso-scale surface craters (SCs) are strategically introduced on the outermost surface of the PCF via hard templating with colloidal SiO2 nanoparticles. Combined structural and electrochemical investigations demonstrate the critical role of SCs in improving the reversibility of PCF in repeated Li plating and stripping. The SCs on the PCF surface provide facile pathways for the transport of Li ions through the electrode, promote Li plating in the internal pores, and serve as meso-scale sites for metallic Li storage. Furthermore, an SC-integrated PCF anode has shown improved rate capability and cycling performance in a full-cell configured with a commercial cathode, when compared to the conventional PCF anode. This work could offer practical guidelines for the development of robust Li storage materials for advanced Li-metal batteries.
引用
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页数:10
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