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S, O dual-doped porous carbon derived from activation of waste papers as electrodes for high performance lithium ion capacitors
To circumvent the imbalances of electrochemical kinetics and charge-storage capacity between Li(+) ion battery anodes and capacitive cathodes in lithium-ion capacitors (LICs), dual carbon based LICs are constructed and investigated extensively. Herein, S, O dual-doped 3D net-like porous carbon (S-NP...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
RSC
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9417749/ https://www.ncbi.nlm.nih.gov/pubmed/36133845 http://dx.doi.org/10.1039/d0na00824a |
Sumario: | To circumvent the imbalances of electrochemical kinetics and charge-storage capacity between Li(+) ion battery anodes and capacitive cathodes in lithium-ion capacitors (LICs), dual carbon based LICs are constructed and investigated extensively. Herein, S, O dual-doped 3D net-like porous carbon (S-NPC) is prepared using waste paper as the carbon source through a facile solvothermal treatment and chemical activation. Benefiting from the combination effect of the rich S,O-doping (about 2.1 at% for S, and 9.0 at% for O), high surface area (2262 m(2) g(−1)) and interconnected porous network structure, the S-NPC-40 material exhibits excellent electrochemical performance as both cathode material and anode material for LICs. S, O doping not only increases the pseudocapacity but also improves the electronic conductivity, which is beneficial to reduce the mismatch between the two electrodes. The S-NPC-40//S-NPC-40 LIC delivers high energy densities of 176.1 and 77.8 W h kg(−1) at power densities of 400 and 20 kW kg(−1), respectively, as well as superior cycling stability with 82% capacitance retention after 20 000 cycles at 2 A g(−1). This research provides an efficient method to convert waste paper to porous carbon electrode materials for high performance LIC devices. |
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