Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 918, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.165726
Keywords
High energy-density; Lithium-ion capacitors; Battery-type Anodes; Transition-metal oxides; Electrospinning nanofibers
Categories
Funding
- National Natural Science Foundation of China [2213000238]
- YanKuang Group Co., Ltd. Technology Project [YKKJ2019AJ08JG-R63]
- Taishan Scholar Project [ts201712020]
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Lithium-ion capacitors (LICs) with nitrogen-doped amorphous carbon and hierarchically porous structure exhibit high rate capacity and cycling stability. By assembling NAC-L-Co3O4//NPCP LICs, high energy density and high power output are achieved. Additionally, LIC devices demonstrate excellent cycle lifespan.
Lithium-ion capacitors (LICs) are emerging as progressive energy storage systems with high energy density, high power output, and a long cycle life span. The key to constructing LICs with high performances is alleviating the dynamics mismatch between the faradic anode and capacitor-type cathode. Herein, nitrogen-doped amorphous carbon linked hierarchically porous Co3O4 nanofibers (NAC-L-Co3O4 NFs) were prepared by electrospinning strategy, where the amorphous carbon can mitigation the volume variation of Co3O4 during the lithiation/delithiation process, while the hierarchically porous structure provides effective channels and exposes more active sites for fast electron transfer and Li+ storage. The delicate structure endows NAC-L-Co3O4 NFs with remarkable rate capacity and robust cycling durability. Furthermore, nitrogen-doped carbon polyhedron (NPCP) is prepared for the cathode, displaying superior rate performances and cycling stability. As a result, by assembling the NAC-L-Co3O4//NPCP LICs, a high energy density of 296 Wh kg(-1) and a high output of 11750 W kg(-1) is delivered. Additionally, the LIC devices display excellent cycle lifespan (80% capacity retention after 10000 cycles at 1 A g(-1)). (C) 2022 Published by Elsevier B.V.
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