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A conjugated plier-linked nano-spacing graphite network for sodium-ion battery

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Title
A conjugated plier-linked nano-spacing graphite network for sodium-ion battery
Author(s)
Yongguang Luo; Lingling Wang; Kim, Doyoung; Li, Qian; Kang, Yingbo; Yang Liu; Yu, Jianmin; Hongdan Wang; Hyoyoung Lee
Publication Date
2021-08
Journal
ENERGY STORAGE MATERIALS, v.39, pp.70 - 80
Publisher
ELSEVIER
Abstract
© 2021 Elsevier B.V. All rights reserved. A sodium-ion battery to use natural graphite is challenging due to the hard accessibility of sodium ions into graphite. Here, we report a plier-linked graphite network (PGN) with plier-like, conjugated active-molecule for sodium-ion battery anode. The newly designed PGN with conjugated linkers provides additional sodium-ion storage sites and sufficient nano-meter level wide two-dimensional spaces for sodium-ion access. The plier-linked graphite network (PDA-PGN) with 9,9-dihexylfluorene-2,7-diboronic acid (PDA) among variable linkers delivers the highest sodiation/desodiation capacity (298/245 mAh g(-1)), at approximately 10 times the level of graphite, while maintaining acceptable rate capability and stability, realizing 1.52 mAh cm(-2) areal capacity with high electrode thickness (282 mu m) and mass loading (7.8 mg cm(-2)). We revealed the knowledge of a major synergistic phenomenon between the conjugated PDA molecules and the nano-sized interlayer distance. Our PDA-PGN design added the new understanding to the alkali-metal ion storage and offers the production potential for low-cost and versatile electrodes.
URI
https://pr.ibs.re.kr/handle/8788114/9916
DOI
10.1016/j.ensm.2021.04.008
ISSN
2405-8297
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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