Hierarchical porous carbon nanofibers for compatible anode and cathode of potassium-ion hybrid capacitor

Hu, Xiang; Zhong, Guobao; Li, Junwei; Liu, Yangjié; Yuan, Jun; Chen, Junxiang; Zhan, Hongbing; Wen, Zhenhai

doi:10.1039/d0ee00477d

Cited by 260 publications

(182 citation statements)

References 40 publications

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“…Figure 3B presents the Raman spectra of SiO 2 @C and MCS, respectively. For SiO 2 /C, two prominent peaks at 1,588 and 1,360 cm −1 are observed, corresponding to the well-documented G band (sp 2 type graphitized carbon) and D band (sp 3 type disordered carbon), respectively (Li et al, 2010 ; Hu et al, 2020 ). The Raman spectra of the MCS also contain both G and D bands.…”

Section: Resultsmentioning

confidence: 88%

“…Great efforts have been made to develop suitable host material with enhanced the K + insertion/extraction kinetics. Currently, various electrode materials such as carbon materials (Hu et al, 2020 ; Liu M. et al, 2020 ; Zhang et al, 2020 ), alloys (Zhang et al, 2017 ; Lei et al, 2018 ; Zheng et al, 2019 ), metal oxide/sulfides (Li et al, 2020a ; Liu Y. et al, 2020 ; Zhou et al, 2020 ), titanium based insertion materials (Sultana et al, 2016 ; Dong et al, 2018 ), and MXene (Okubo et al, 2018 ; Tang et al, 2020 ; Zhao et al, 2020 ) have been extensively studied as promising anodes for K-ion storage. Benefiting from the abundant resources, low cost, allotrope, and excellent physical/chemical stability, carbon materials have been widely reported and used for KIBs (Jian et al, 2015 ; Liu et al, 2019b ; Zhang R. et al, 2019 ; Huang et al, 2020 ; Li et al, 2020b ).…”

Section: Introductionmentioning

confidence: 99%

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Aerosol-Assisted Assembly of Mesoporous Carbon Spheres With Fast and Stable K-ion Storage

Guo

Wang

et al. 2020

Front. Chem.

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Cost effective anode material with rational design is of significance for rechargeable potassium ion batteries (KIBs). Graphite anode currently still suffers unfavorable rate capability and moderate cycling stability. In this work, we report a mesoporous carbon sphere with rich porous structure as an anode material for KIBs with the assistance of an aerosol spray technology. The as-developed carbon spheres exhibit a well-defined spherical structure with favorable surface area of 1106.32 m 2 g −1 . Furthermore, the effect of different electrolytes on the electrochemical performance of the carbon anode has been investigated systematically. As expected, the carbon material shows excellent potassium storage performance in terms of improved specific capacity of 188.2 mAh g −1 , rate capability and prolonged cyclability with a high capacity of 105.3 mAh g −1 after 500 cycles at a rate of 100 mA g −1 toward potassium storage in KFSI based carbonate electrolyte.

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Section: Resultsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Aerosol-Assisted Assembly of Mesoporous Carbon Spheres With Fast and Stable K-ion Storage

Guo

Wang

et al. 2020

Front. Chem.

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“…[43,44] We further calculate the slope of logarithm peak current versus logarithm scan rate to distinguish diffusion-controlled or capacitive processes. [45,46] Figure S14, Supporting Information, indicates that the slope values for redox peaks are very close to 1, implying a fast capacitive process. With the increase in scan rate, the capacitive contribution to the total capacity gradually increases up to 98.8% at 10 mV s −1 (Figure 4g,h).…”

Section: Na Ion Storage Properties Of Mose 2 @Hbcmentioning

confidence: 97%

In Situ Hard‐Template Synthesis of Hollow Bowl‐Like Carbon: A Potential Versatile Platform for Sodium and Zinc Ion Capacitors

Fei

Wang

et al. 2020

Advanced Energy Materials

173

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Metal‐ion capacitors are being widely studied to reach a balance between power and energy output by combining the merits of conventional batteries and capacitors. The main challenge for Na‐ion capacitors is that the battery‐type anode usually has unsatisfactory power density and long‐term stability since most Na host materials have a poor kinetic and structural stability. Herein, asymmetric hollow bowl‐like carbon (HBC) materials are rationally designed and fabricated through an in situ hard‐template approach. The formation originates from a subtle control of capillary force and the mechanical strength of the carbon shell. The HBCs possess abundant mesopores, high volumes of accessible surface area as well as an open macropore network. As a 3D host, MoSe2 nanocrystals are anchored onto the HBC matrix by a solid‐phase reaction. The obtained MoSe2@HBC nanobowl electrode exhibits pseudocapacitive sodium storage with fast kinetics, improved capacity at high currents, and cycle stability, which is also supported by DFT calculations. Sodium ion capacitor full cells are fabricated using the two bowl‐like architectures (MoSe2@HBC as the anode and HBC as the cathode), which deliver high energy and power densities, long cycle life, and a comparably low self‐discharge rate. Moreover, application of the HBC in a zinc‐ion capacitor (ZIC) is also demonstrated.

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“…Metal organic frameworks (MOFs) materials have emerged as promising precursors and templates to synthesize carbon with controlled pore sizes and heteroatom doping owing to their superior property of high surface areas, abundantly accessible metal ions or clusters, and tailorable structures. [99][100][101][102][103] ZIF-67 derived from nitrogen-doped carbon nanotubes-coated porous carbon (CNT@PC) has been synthesized for boosting sodium and potassium-ion storage performance. The CNT@PC is prepared by carbonization of ZIF-67 precursor in Ar/H 2 atmosphere.…”

Section: Nitrogen-doped Carbonmentioning

confidence: 99%

Emerging Potassium‐ion Hybrid Capacitors

Liu

Chang

et al. 2020

ChemSusChem

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As a new type of capacitor–battery hybrid energy storage device, metal‐ion capacitors have attracted widespread attention because of their high‐power density while ensuring energy density and long lifespan. Potassium‐ion capacitors (KICs) featuring the merits of abundant potassium resources, lower standard electrode potential, and low cost have been considered as potential alternatives to lithium‐/sodium‐ion capacitors. However, KICs still face issues including unsatisfactory reaction kinetics, low energy density, and poor lifetime owing to the large radius of the potassium ion. In this Review, the importance of emerging potassium‐ion capacitor is addressed. The Review offers a brief discussion of the fundamental working principle of KICs, along with an overview of recent advances and achievements of a variety of electrode materials for dual carbon and non‐dual carbon KICs. Furthermore, electrolyte chemistry, binders as well as electrode/electrolyte interface, are summarized. Finally, existing challenges and perspectives on further development of KICs are also presented.

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Hierarchical porous carbon nanofibers for compatible anode and cathode of potassium-ion hybrid capacitor

Abstract: Hierarchical porous carbon nanofibers can efficiently eliminate kinetics and capacity mismatches between the anode and cathode of the potassium-ion hybrid capacitor.

Cited by 260 publications

References 40 publications

Aerosol-Assisted Assembly of Mesoporous Carbon Spheres With Fast and Stable K-ion Storage

Aerosol-Assisted Assembly of Mesoporous Carbon Spheres With Fast and Stable K-ion Storage

In Situ Hard‐Template Synthesis of Hollow Bowl‐Like Carbon: A Potential Versatile Platform for Sodium and Zinc Ion Capacitors

Emerging Potassium‐ion Hybrid Capacitors

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