Phosphorus-doped thick carbon electrode for high-energy density and long-life supercapacitors

Wang, Feng; Cheong, Jun Young; He, Qiu; Duan, Gaigai; He, Shuijian; Zhang, Lin; Zhao, Yan; Kim, Il‐Doo; Jiang, Shaohua

doi:10.1016/j.cej.2021.128767

Cited by 123 publications

(56 citation statements)

References 71 publications

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“…The slight reduction of the cellulosic matrix (6.07%) below 200 1C corresponds to the evaporation of water. 20 A significant weight loss occurred in the range of 250-400 1C (weight loss of 59.60%), indicating that cellulose began to decompose. 21 Above 400 1C, the cellulosic matrix continued to break down, and the weight loss increased to 66.94%.…”

Section: Resultsmentioning

confidence: 98%

“…Micropores effectively maintain the transport channels for infiltration of the electrolyte ions, which are crucial for the high energy density of energy-storage devices. 32 Therefore, M-CMA-800 with a unique layered porous microtube array structure is expected to be an excellent candidate for the construction of supercapacitor electrodes. Electrochemical performance tests were performed with a three-electrode system in 1 M KOH electrolyte.…”

Section: Resultsmentioning

confidence: 99%

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Facile fabrication of carbon microtube arrays from waste wood for use as self-supporting supercapacitor electrodes

Luo

et al. 2022

Mater. Chem. Front.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Facile fabrication of carbon microtube arrays from waste wood for use as self-supporting supercapacitor electrodes

Luo

et al. 2022

Mater. Chem. Front.

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“…Furthermore, the flexible ASC device yielded an excellent energy density of 1.42 mWh cm −2 at a power density of 1.15 mW cm −2 and retains 1.01 mWh cm −2 at a power density of 22 mW cm −2 (Figure 5g), which are substantially higher than those of other recently reported supercapacitor devices. [ 19,45,58–65 ] Significantly, one flexible ASC device can light up a timer for 1.5 h and 26 red light emitting diodes (1.8–2.2 V) for several minutes, demonstrating the potential practical applications (Figure 5h,i).…”

Section: Resultsmentioning

confidence: 98%

Interface Engineering on Cellulose‐Based Flexible Electrode Enables High Mass Loading Wearable Supercapacitor with Ultrahigh Capacitance and Energy Density

Chen

Ling

Huang

et al. 2021

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For practical energy storage devices, a bottleneck is to retain decent integrated performances while increasing the mass loading of active materials to the commercial level, which highlights an urgent need for novel electrode structure design strategies. Here, an active nitrogen‐doped carbon interface with “high conductivity, high porosity, and high electrolyte affinity” on a flexible cellulose electrode surface is engineered to accommodate 1D active materials. The high conductivity of interface favors fast electron transport, while its high porosity and high electrolyte affinity properties benefit ion migration. As a result, the flexible anode accommodated by carbon nanotubes achieves an ultrahigh capacitance of 9501 mF cm−2 (315.6 F g−1) at a high mass loading of 30.1 mg cm−2, and the flexible cathode accommodated by polypyrrole nanotubes realizes a remarkably high capacitance of 6212 mF cm−2 (248 F g−1, 25 mg cm−2). The assembled flexible quasi‐solid‐state asymmetric supercapacitor delivers a maximum energy density of 1.42 mWh cm−2 (2.2 V, 2105 mF cm−2), representing the highest value among all reported flexible supercapacitors. This versatile design concept provides a new way to prepare high performance flexible 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%

“…The ordered porous carbon produced by the template technique matches the interconnected mesoporous structure of porous templates [55] . By selecting or modifying the pore structure of the template, the pore structure of the porous carbon may be directed and steered [38] . Song et al .…”

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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Phosphorus-doped thick carbon electrode for high-energy density and long-life supercapacitors

Cited by 123 publications

References 71 publications

Facile fabrication of carbon microtube arrays from waste wood for use as self-supporting supercapacitor electrodes

Facile fabrication of carbon microtube arrays from waste wood for use as self-supporting supercapacitor electrodes

Interface Engineering on Cellulose‐Based Flexible Electrode Enables High Mass Loading Wearable Supercapacitor with Ultrahigh Capacitance and Energy Density

Mechanisms of Porous Carbon‐based Supercapacitors

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