Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 49, Pages 22126-22131Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202008726
Keywords
hydrogen bonds; metal-organic polymers; redox centers; sodium-ion batteries; specific capacity
Categories
Funding
- National Natural Science Foundation of China [21822506, 51761165025, 21835004, 51671107]
- Tianjin Natural Science Foundation [19JCJQJC62400]
- Fundamental Research Funds for the Central Universities [020-63201040]
- 111 project [B12015]
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Organic electrode materials suffer from low electronic conductivity and poor structure stability. Herein, a metal-organic polymer, Ni-coordinated tetramino-benzoquinone (Ni-TABQ), is synthesized via d-pi hybridization. The polymer chains are stitched by hydrogen bonds to feature as a robust two-dimensional (2D) layered structure. It offers both electron conduction and Na(+)diffusion pathways along the directions of the polymer chains and the hydrogen bonds. With both the conjugated benzoid carbonyls and imines as the redox centers for the insertion and extraction of Na+, the Ni-TABQ delivers high capacities of about 469.5 mAh g(-1)at 100 mA g(-1)and 345.4 mAh g(-1)at 8 A g(-1). The large capacities are sustained for 100 cycles with almost 100 % coulombic efficiencies. The exceptional electrochemical performance is attributed to the unique 2D electron conduction and Na(+)diffusion pathways enabled by the robust Ni-N and hydrogen bonds.
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