Decoupling and correlating the ion transport by engineering 2D carbon nanosheets for enhanced charge storage

Yu, Jinhe; Yu, Chang; Guo, Wei; Zhao, Wang; Li, Shaofeng; Chang, Jiangwei; Tan, Xin; Ding, Yiwang; Zhang, Mengdi; Yang, Le; Xie, Yuanyang; Fu, Rong; Qiu, Jieshan

doi:10.1016/j.nanoen.2019.103921

Cited by 104 publications

(68 citation statements)

References 48 publications

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“…The Warburg coefficient values of PCS and PCS-MnO 2 composites are 0.33 ohm s −1/2 , 0.69 ohm s −1/2 , 1.35 ohm s −1/2 , and 1.97 ohm s −1/2 , respectively. It is known that the Warburg coefficient is inversely proportional to the ion diffusion coefficient [ 45 ]. Therefore, it can be inferred from the Warburg coefficient and the change trend that abundant mesopores are beneficial for ion diffusion, and as the amount of loaded MnO 2 increases, the difficulty of ion diffusion increases.…”

Section: Resultsmentioning

confidence: 99%

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Liu

et al. 2020

Nanomaterials

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Polyethylene terephthalate (PET) plastic has been extensively used in our social life, but its poor biodegradability has led to serious environmental pollution and aroused worldwide concern. Up to now, various strategies have been proposed to address the issue, yet such strategies remain seriously impeded by many obstacles. Herein, waste PET plastic was selectively carbonized into three-dimensional (3D) porous carbon nanosheets (PCS) with high yield of 36.4 wt%, to be further hybridized with MnO2 nanoflakes to form PCS-MnO2 composites. Due to the introduction of an appropriate amount of MnO2 nanoflakes, the resulting PCS-MnO2 composite exhibited a specific capacitance of 210.5 F g−1 as well as a high areal capacitance of 0.33 F m−2. Furthermore, the PCS-MnO2 composite also showed excellent cycle stability (90.1% capacitance retention over 5000 cycles under a current density of 10 A g−1). The present study paved an avenue for the highly efficient recycling of PET waste into high value-added products (PCSs) for electrochemical energy storage.

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Section: Resultsmentioning

confidence: 99%

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Liu

et al. 2020

Nanomaterials

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“…[471] The resistance contains many components, such as the electrode matrix resistance (including the active materials resistance, the conductive additives resistance, the binder's resistance, the contact resistance between these additives and/or contact resistance between active materials), the current collector resistance, and the contact resistance between the electrode and the current collector. [472][473][474] If the electroactive materials own high electrical conductivity, the total resistance of the electrode will stay low, resulting in high rate performance. [475] That is the reason why carbon-based EDLCs and RuO 2 -based pseudocapacitors normally display high power densities.…”

Section: Improving Electrons Transportmentioning

confidence: 99%

Wide Voltage Aqueous Asymmetric Supercapacitors: Advances, Strategies, and Challenges

Huang

Yuan

Chen

2021

Adv Funct Materials

142

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Asymmetric supercapacitors (ASCs) can substantially broaden their working voltage range, benefiting from the advantages of both cathode and anode while breaking through the energy storage limitations of corresponding symmetric cells. Wide voltage aqueous ASCs hold great promise for future electronic systems that require satisfied energy density, power density, and cycle life, due to the advantages of aqueous electrolyte in terms of low cost, operational safety, facile manufacture, environment-friendly, and high ionic conductivity. This review will first briefly present an overview of the historical developments, charge storage mechanisms, and matching principles of wide voltage aqueous ASCs. Then, the cathode and anode materials with wide potential windows for building wide voltage aqueous ASCs over the last few decades are summarized. The next section details the optimization methods of aqueous electrolyte related to wide voltage aqueous ASCs. In addition, the basic device configurations of wide voltage aqueous ASCs are classified and discussed. Furthermore, several strategies are proposed for achieving highperformance wide voltage aqueous ASCs in terms of voltage window, specific capacitance, rate performance, and electrochemical stability. Finally, to motivate further research and development, several key scientific challenges and the perspectives are discussed.

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“…4b). 46 By using dopamine and MgAl-layered double hydroxides as the carbon suppliers and 2D structure-directing templates, carbon sheets with controllable thickness could be obtained by simply varying the reaction time, and the fabricated electrode with an optimal thickness of B99.23 nm could be fabricated, delivering an outstanding retention rate of 81% at 100 A g À1 and high energy output of 94 W h kg À1 at 1.8 kW kg À1 in an ionic liquid device. Further, 1D carbon nanofibers and nanorods could afford shortcut channels for electron transfer, and they can be readily shaped into relevant geometries or assembled with functionalized modules for preparing advanced CSs.…”

Section: Morphology Controlmentioning

confidence: 99%

“…Schematic illustration of ion transfer inside a 2D carbon electrode; correlation between the sheet thickness and ion transport behavior; and Ragone plots (b). (Reproduced with permission 46. Copyright 2019, Elsevier.)…”

mentioning

confidence: 99%

Recent advances in carbon-based supercapacitors

et al. 2020

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Decoupling and correlating the ion transport by engineering 2D carbon nanosheets for enhanced charge storage

Cited by 104 publications

References 48 publications

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Controllable Carbonization of Plastic Waste into Three-Dimensional Porous Carbon Nanosheets by Combined Catalyst for High Performance Capacitor

Wide Voltage Aqueous Asymmetric Supercapacitors: Advances, Strategies, and Challenges

Recent advances in carbon-based supercapacitors

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