Morphology evolution of CoNi‐LDHs synergistically engineered by precipitant and variable cobalt for asymmetric supercapacitor with superior cycling stability

EcoEnergy, Год журнала: 2023, Номер 1(2), С. 448 - 459

Опубликована: Дек. 1, 2023

Abstract Cobalt–nickel layered double hydroxides (CoNi‐LDHs) have been extensively synthesized through precipitation methods for their application in supercapacitors (SC). However, the influence of precipitant quantity on both morphology evolution and SC performance has an underexplored area. This study systematically examines morphological changes CoNi‐LDHs by varying alkaline evaluates asymmetric SC. The findings reveal a progressive transformation with increase content, starting from nanorod (Co 1 Ni 2 (OH) ‐1HMA), progressing to nanorod/nansosheet composite ‐4HMA), ultimately evolving into nanosheet ‐8HMA). is attributed synergetic effect variable cobalt, which provides multiple valences induces evolution. resulting LDHs demonstrate different performances: (1) Co ‐1HMA exhibits maximum capacitance 1764 F/g, while ‐4HMA ‐8HMA show values 1460 F/g 1676 respectively; (2) rate capabilities showcase percentages 60.5% ‐1HMA, 83.1% ‐4HMA, 66.3% ‐8HMA; (3) energy densities are recorded at 72.1 Wh/kg 41.3 62.8 Co1Ni ‐8HMA. Particularly, superlong cycling stability, retaining approximately 99% after 25000 consecutive charge/discharge cycles 7.0 A/g. result underscores its significant potential efficient storage applications.

Язык: Английский

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Electrocatalysts composed of amorphous red phosphorous nanosheets coupled with carboxylic group carbon nanotubes for Li S batteries

Journal of Energy Storage, Год журнала: 2023, Номер 77, С. 109916 - 109916

Опубликована: Дек. 11, 2023

Язык: Английский

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Lithiophilic CoF2@C hollow spheres towards spatial lithium deposition for stable lithium metal batteries

Journal of Energy Chemistry, Год журнала: 2024, Номер 97, С. 55 - 67

Опубликована: Июнь 5, 2024

Язык: Английский

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In-situ engineering of centralized mesopores and edge nitrogen for porous carbons toward zinc ion hybrid capacitors

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 685, С. 674 - 684

Опубликована: Янв. 21, 2025

Язык: Английский

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Fabrication of nano-carbon cages via molten salt CO2 electrolysis for high-performance symmetrical supercapacitor

Nano Energy, Год журнала: 2025, Номер 136, С. 110704 - 110704

Опубликована: Янв. 27, 2025

Язык: Английский

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Insights into the Chemistry of the Cathodic Electrolyte Interphase for PTFE-Based Dry-Processed Cathodes

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(34), С. 40488 - 40495

Опубликована: Авг. 18, 2023

Dry processing is a promising method for high-performance and low-cost lithium-ion battery manufacturing which uses polytetrafluoroethylene (PTFE) as binder. However, the electrochemical stability of PTFE binder in cathodes generated chemistry cathode electrolyte interphase (CEI) layers are rarely reported. Herein, CEI properties studied via cycling high-loading dry-processed electrodes electrolytes with LiPF6 or LiClO4 salt. Using salt can eliminate other possible F sources, allowing decomposition to be studied. The detection LiF cells confirms that undergoes side reaction(s) cathodes. When compared LiClO4, layer much thicker when used These results provide insights into may potentially enlighten development binders high efficiency long durability DP-based LIBs.

Язык: Английский

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In-situ constructing hetero-structured Mo2C-Mo2N embedded in carbon nanosheet as an efficient separator modifier for high-performance lithium-sulfur batteries

Chemical Engineering Journal, Год журнала: 2023, Номер 475, С. 146133 - 146133

Опубликована: Сен. 19, 2023

Язык: Английский

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Self-assembly fabrication of lignin-derived carbon with dual heteroatoms doping for high-performance supercapacitor

Deleted Journal, Год журнала: 2023, Номер 5(1)

Опубликована: Май 12, 2023

Abstract Renewable and low-cost biomass is an ideal sustainable alternative to petroleum-based resources, but producing biomass-based carbon electrode with high performances remains a challenge. Herein, we propose facile self-assembly strategy fabricate biomass-derived N, S co-doping from lignosulfonate without any activation or template process. Taking advantage of the coordination between Fe ions lignosulfonate, resultant exhibits spherical structure abundant graphitized nanosheets, leading specific surface area rational pore structure, which are beneficial electron/ion transport storage. The contents doping N (8.47 wt%) (2.56 significantly boost electrochemical performances. As supercapacitor electrode, material displays capacitance 390 F g −1 , excellent cycling stability energy density 14.7 W h kg at power 450 . This study provides potential for synthesizing cost-effective heteroatom-doped materials functional groups heteroatom sources, such as chitosan, collagen, gelatin. Graphical

Язык: Английский

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Revealing the effect of graphite source on the properties of synthesized graphene oxide

Carbon letters, Год журнала: 2024, Номер 34(4), С. 1219 - 1228

Опубликована: Фев. 5, 2024

Язык: Английский

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In-Situ Ionothermal Synthesis of Nanoporous Carbon/Oxide Composites: A New Key to Functional Separators for Stable Lithium-Sulfur Batteries

Nano Energy, Год журнала: 2024, Номер 130, С. 110091 - 110091

Опубликована: Авг. 5, 2024

Язык: Английский

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