Journal
ADVANCED MATERIALS
Volume 31, Issue 51, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201905744
Keywords
electronic tuning; energy storage; faradaic capacitance; metal-organic frameworks; redox strategies
Categories
Funding
- National 1000 Young Talents Program of China
- National Natural Science Foundation of China [21805103, 21805104]
- Fundamental Research Funds for the Central Universities [2018KFYXKJC044, 2018KFYYXJJ121, 2017KFXKJC002, 2017KFYXJJ164]
- Opening Fund of Hubei Key Laboratory of Material Chemistry and Service Failure [2019MCF02]
- Center for Nanoscale Characterization AMP
- Devices (CNCD), WNLO
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The development of efficient electrode materials is a cutting-edge approach for high-performance energy storage devices. Herein, an effective chemical redox approach is reported for tuning the crystalline and electronic structures of bimetallic cobalt/nickel-organic frameworks (Co-Ni MOFs) to boost faradaic redox reaction for high energy density. The as-obtained cobalt/nickel boride/sulfide exhibits a high specific capacitance (1281 F g(-1) at 1 A g(-1)), remarkable rate performance (802.9 F g(-1) at 20 A g(-1)), and outstanding cycling stability (92.1% retention after 10 000 cycles). An energy storage device fabricated with a cobalt/nickel boride/sulfide electrode exhibits a high energy density of 50.0 Wh kg(-1) at a power density of 857.7 W kg(-1), and capacity retention of 87.7% (up to 5000 cycles at 12 A g(-1)). Such an effective redox approach realizes the systematic electronic tuning that activates the fast faradaic reactions of the metal species in cobalt/nickel boride/sulfide which may shed substantial light on inspiring MOFs and their derivatives for energy storage devices.
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