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A Redox-Active 2D Metal-Organic Framework for Efficient Lithium Storage with Extraordinary High Capacity

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [1];  [1];  [3];  [3];  [3];  [4];  [4];  [2];  [1]
  1. Tianjin Univ., Tianjin (China). Dept. of Chemistry, Inst. of Molecular Plus, Tianjin Key Lab. of Molecular Optoelectronic Science
  2. Tianjin Univ., Tianjin (China). School of Materials Science and Engineering, Key Lab. of Advanced Ceramics and Machining Technology Tianjin Key Lab. of Composite and Functional Materials
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry
  4. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072 China
Metal–organic framework cathodes usually exhibit low capacity and poor electrochemical performance for Li-ion storage owing to intrinsic low conductivity and inferior redox activity. Now a redox-active 2D copper–benzoquinoid (Cu-THQ) MOF has been synthesized by a simple solvothermal method. The abundant porosity and intrinsic redox character endow the 2D Cu-THQ MOF with promising electrochemical activity. Superior performance is achieved as a Li-ion battery cathode with a high reversible capacity (387 mA h g-1), large specific energy density (775 Wh kg-1), and good cycling stability. The reaction mechanism is unveiled by comprehensive spectroscopic techniques: a three-electron redox reaction per coordination unit and one-electron redox reaction per copper ion mechanism is demonstrated. This elucidatory understanding sheds new light on future rational design of high-performance MOF-based cathode materials for efficient energy storage and conversion.
Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
SC0012704
OSTI ID:
1597261
Alternate ID(s):
OSTI ID: 1689989
Report Number(s):
BNL--213603-2020-JAAM
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Vol. 59; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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