Two-dimensional fused π-conjugated multi-activity covalent organic framework as high-performance cathode for lithium-ion batteries

被引:3
|
作者
Sun, Zhonghui [1 ]
Seo, Jeong-Min [2 ]
Liu, Huiling [3 ]
Wei, Yingzhen [4 ]
Zhang, Yue [1 ]
Li, Zhongping [2 ]
Yao, Hongyan [1 ]
Guan, Shaowei [1 ]
Baek, Jong-Beom [2 ]
机构
[1] Jilin Univ, Key Lab Highperformance Plast, Natl & Local Joint Engn Lab Synth Technol High Per, Changchun 130012, Peoples R China
[2] Ulsan Nation Inst Sci & Technol UNIST, Ctr Dimens Controllable Organ Frameworks, Dept Energy & Chem Engn, Ulsan 44919, South Korea
[3] Jilin Univ, Inst Theoret Chem, Lab Theoret & Computat Chem, Changchun 130023, Peoples R China
[4] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China
基金
新加坡国家研究基金会;
关键词
Covalent organic frameworks; Energy storage; High capacity; Lithium-ion batteries; Organic cathode; CARBONYLS; POLYMERS; DESIGN; ENERGY;
D O I
10.1016/j.nanoen.2024.110073
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
Electrochemically active covalent organic frameworks (COFs) with robust skeletons and permanent porosity are attracting wide interest as promising electrode materials for Li-ion batteries (LIBs). However, current COF-based electrodes suffer from poor capacity and rate performance due to limited redox-active sites and low conductivity. To address these challenges, combining the advantages of high stability of the macromolecular skeleton and high-density redox-active C--O and C--N groups, a novel two-dimensional (2D) fused pi-conjugated COF (denoted as HAPT-COF) with ultrahigh theoretical capacity is fabricated. In particular, the post-hydrothermal reaction between HAPT-COF and graphene oxide (GO) affords intercalated COF-based nanocomposites (HAPTCOF@rGO), featuring with improved utilization of redox-active sites, electronic conductivity, and structure stability. The C--O and C--N groups on the walls contribute to reversible 18 Li-ions storage for each HAPT-COF repeating unit across three stages. Owing to these advantages, the HAPT-COF@rGO exhibited an excellent reversible capacity (558 mAh g- 1 at 0.1 C), cycling stability (92% capacity retention after 1000 cycles at 10 C), and superior rate performance (318 mAh g- 1 at 10 C), ranking the best among reported polymer cathodes in LIBs.
引用
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页数:9
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