Electrode thickness design toward bulk energy storage devices with high areal/volumetric energy density

Wang, Feng; Zhang, Lin; Zhang, Qian; Yang, Jinjiang; Duan, Gaigai; Xu, Wenhui; Yang, Feng; Jiang, Shaohua

doi:10.1016/j.apenergy.2021.116734

Cited by 76 publications

(32 citation statements)

References 50 publications

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“…The high-resolution C1s can be divided into four peaks at 284.89, 285.2, 286.1, and 288.5 eV, which are corresponding to C=C, C-N, C-O, and O=C-O (Figure 2b), respectively. [44][45][46] The presence of C-O and O=C-O peak coming from high-resolution C1s suggest the presence of oxygen functionalities associated with CNTs. These oxygen-rich functional groups have the ability to coordinate Ni 2+ and Co 2+ ions, so that the Ni and Co elements can be evenly distributed on the carbon nanotubes, which also corresponds to the uniform distribution of Ni and Co elements in the mapping diagram.…”

Section: Resultsmentioning

confidence: 99%

Encapsulated NiCo₂S₄‐based straight bamboo‐shaped N‐CNT as efficient and stable oxygen electrocatalysts

Gao

Zhao

2021

Electrochemical Science Adv

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Developing highly effective and stable non-precious bifunctional oxygen electrocatalysts is crucial and challenging. Herein, we report nano-mediated straight bamboo-shaped nitrogen-doped carbon nanotubes modified with encapsulated NiCo 2 S 4 -based nanoparticles (E-NiCo 2 S 4 /SBS-NCNTs) by electrodeposition and procedural calcination strategy, in which nitrogen-doped carbon nanotubes with straight bamboo shape (SBS-NCNTs) show more average diameter and encapsulated NiCo 2 S 4 -based nanoparticles (E-NiCo 2 S 4 ) are coated by carbon, and what makes us even more excited is that they are evenly dispersed on SBS-NCNTs surface, not just at the tip or inside. When applied for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), E-NiCo 2 S 4 /SBS-NCNTs show excellent catalytic activity, and onset potential (E onset ) in OER and ORR is only 1.52 V and 0.95 V (vs. RHE) in 0.1 M KOH, respectively. More importantly, the hybrids exhibit good methanol tolerance, with almost unchanged for ORR performance after adding 0.5 M methanol, and it has highly stability, the current density dropped by 22% after 7 h of reaction. The interaction of NiCo 2 S 4 with the external carbon layer can greatly enhance the electrocatalytic activity toward the OER and it has a complete 4ereaction process toward the ORR. The excellent electrocatalytic activity is mainly due to synergistic enhancement effect, in which SBS-NCNTs with highly catalytic activity provide good conductivity, expose more active sites and promotes fast mass transfer; Carbon-coated NiCo 2 S 4 -based nanoparticles can improve the local work function of SBS-NCNT through synergistic electronic interaction, promoting O 2 adsorption, ensure rapid electron transport, and enable SBS-NCNT to improve its electrocatalytic activity. Because of the weakness of Ostwald effect and synergistic enhancement, the stability and catalytic activity of NiCo 2 S 4 -based nanoparticles can be greatly improved. All these advantages can synergistically improve the electrocatalytic efficiency and make it become one of the most promising bifunctional oxygen electrocatalysts.

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Section: Resultsmentioning

confidence: 99%

Encapsulated NiCo₂S₄‐based straight bamboo‐shaped N‐CNT as efficient and stable oxygen electrocatalysts

Gao

Zhao

2021

Electrochemical Science Adv

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“…It is clear that our all N-PCM-9-based SCs show outperformed areal energy density than many reported SCs based on FTC electrodes. 41,59,61,[63][64][65][66] It also owns comparable or even better gravimetric density than other thick carbon electrode-based SCs. 59,63,[67][68][69][70][71][72][73] Figure 7(C) further compares the device thickness, areal and gravimetric capacitances of N-PCM-9-based quasi-solid-state SC with other thick-electrodebased SCs.…”

Section: Electrochemical Performancementioning

confidence: 96%

“…41,59,61,[63][64][65][66] It also owns comparable or even better gravimetric density than other thick carbon electrode-based SCs. 59,63,[67][68][69][70][71][72][73] Figure 7(C) further compares the device thickness, areal and gravimetric capacitances of N-PCM-9-based quasi-solid-state SC with other thick-electrodebased SCs. 41,59,60,[63][64][65][74][75][76][77] Considering they are correlating factors, comprehensively, our N-PCM-9-based SC shows compatible device thickness, gravimetric capacitance, and much better areal capacitance than others.…”

Section: Electrochemical Performancementioning

confidence: 96%

“…59,63,[67][68][69][70][71][72][73] Figure 7(C) further compares the device thickness, areal and gravimetric capacitances of N-PCM-9-based quasi-solid-state SC with other thick-electrodebased SCs. 41,59,60,[63][64][65][74][75][76][77] Considering they are correlating factors, comprehensively, our N-PCM-9-based SC shows compatible device thickness, gravimetric capacitance, and much better areal capacitance than others. These results corroborate that the remarkable areal performance, freestanding/binder-free features, long cycling life, and sustainable production route of N-PCM-9 make it a competitive SC electrode.…”

Section: Electrochemical Performancementioning

confidence: 99%

See 1 more Smart Citation

Nature‐inspired porous multichannel carbon monolith: Molecular cooperative enables sustainable production and high‐performance capacitive energy storage

Liu

Zheng

et al. 2021

InfoMat

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The advancement of supercapacitors (SCs) is closely bound up with the breakthrough of rational design of energy materials. Freestanding and thick carbon (FTC) materials with well-organized porous structure is promising SC electrode delivering high areal capacitive performance. However, controllable and sustainable fabrication of such FTC electrode is still of great challenges. Inspired by natural honeycombs with cross-linked multichannel structure, herein, an innovative molecular-cooperative-interaction strategy is elaborately provided to realize honeycomb-like FTC electrodes. The nitrogen-doped porous carbon monolith (N-PCM) is obtained with advantages of interconnect pore structure and abundant nitrogen doping. Such strategy is based on naturally abundant molecular precursors, and free of pore-templates, expensive polymerization catalyst, and dangerous reaction solvent, rendering it a sustainable and cost-effective process. Systematic control experiments reveal that strong interactions among molecular precursors promise the structural stability of N-PCM during carbonization, and rational selection of molecular precursors with chemical blowing features is key step for well-developed honeycomb-like pore structure. Interestingly, the optimized sample exhibits hierarchical pore structure with specific surface area of 626.4 m 2 g À1 and rational N-doping of 7.01 wt%. The derived SC electrode with high mass loading of 40.1 mg cm À2 shows an excellent areal capacitance of 3621 mF cm À2 at 1 mA cm À2 and good rate performance with 2920 mF cm À2 at 25 mA cm À2 . Moreover, the constructed aqueous symmetric SC and quasi-solid-state SC produce high energy densities of 0.32 and 0.27 mWh cm À2 , respectively. We believe that such a composition/microstructure controllable method can promote the fabrication and development of other thick electrodes for energy storage devices.

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“…Activated carbon (ACs) is a commonly‐used electrode material, having the advantages of large surface area, good electrical properties, and low cost. Acs are usually generated by physical (thermal) and/or chemical activation of various carbonaceous materials such as wood, coal, nut shells, etc [38–47] . Physical activation usually refers to the high temperature (700∼1200 °C) treatment of carbon precursors in the presence of oxidizing gases such as steam, carbon dioxide, and air.…”

Section: The Micro‐mechanism Of Energy Storagementioning

confidence: 99%

Mechanisms of Porous Carbon‐based Supercapacitors

Cao

et al. 2021

ChemNanoMat

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Supercapacitors are electrochemical energy storage devices that function by the adsorption of ions from an electrolyte onto an electrode with a high surface area. Due to the advantages such as high‐power density and a longer life span, supercapacitors bearing nanoscale porous carbon‐based electrodes, have gained special interest. The high specific surface area of nano‐scale porous carbon‐based electrodes could substantially increase the energy density of supercapacitors. Here we review the research pertaining to the energy storage of supercapacitors and the mechanism regulating the microscopic energy storage within nanopores. The advantages and challenges of various in situ characterization techniques and simulation techniques in the energy storage mechanism were discussed. The effective combination of in situ characterization techniques and computer simulations has been highlighted since it provides a useful means to understand the intrinsic properties of the electrode/electrolyte interface and various physicochemical reactions that take place during charging/discharging. This understanding is valuable for the design and development of next‐generation supercapacitors with the high power density and high energy density.

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Electrode thickness design toward bulk energy storage devices with high areal/volumetric energy density

Cited by 76 publications

References 50 publications

Encapsulated NiCo₂S₄‐based straight bamboo‐shaped N‐CNT as efficient and stable oxygen electrocatalysts

Encapsulated NiCo₂S₄‐based straight bamboo‐shaped N‐CNT as efficient and stable oxygen electrocatalysts

Nature‐inspired porous multichannel carbon monolith: Molecular cooperative enables sustainable production and high‐performance capacitive energy storage

Mechanisms of Porous Carbon‐based Supercapacitors

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Electrode thickness design toward bulk energy storage devices with high areal/volumetric energy density

Cited by 76 publications

References 50 publications

Encapsulated NiCo2S4‐based straight bamboo‐shaped N‐CNT as efficient and stable oxygen electrocatalysts

Encapsulated NiCo2S4‐based straight bamboo‐shaped N‐CNT as efficient and stable oxygen electrocatalysts

Nature‐inspired porous multichannel carbon monolith: Molecular cooperative enables sustainable production and high‐performance capacitive energy storage

Mechanisms of Porous Carbon‐based Supercapacitors

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Product

Resources

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Encapsulated NiCo₂S₄‐based straight bamboo‐shaped N‐CNT as efficient and stable oxygen electrocatalysts

Encapsulated NiCo₂S₄‐based straight bamboo‐shaped N‐CNT as efficient and stable oxygen electrocatalysts