A Porous Perchlorate‐Doped Polypyrrole Nanocoating on Nickel Nanotube Arrays for Stable Wide‐Potential‐Window Supercapacitors

Chen, Gao‐Feng; Li, Xian-Xia; Zhang, Liyi; Li, Nan; Ma, Tianyi; Liu, Zhao‐Qing

doi:10.1002/adma.201601781

Cited by 182 publications

(80 citation statements)

References 68 publications

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“…In 2016, An et al manufactured mesoporous Ni@C hybrids for supercapacitor with a high capacitance value of 2006 F g −1 at 1 A g −1 . Moreover, Liu's group reported that material based on NiNTAs@PPy showed stable wide potential window in supercapacitor application . Nevertheless, the construction of zero valent metallic nickel with carbon composite structure is disputed.…”

Section: Introductionmentioning

confidence: 99%

A Core‐Shell Assembly of Hierarchical Porous Ni@C Nanospheres Synthesized from Metal‐Organic Framework for Electrochemical Energy Application

Kumar

Kim

Jeong

et al. 2019

Physica Status Solidi (a)

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Metal‐organic frameworks (MOFs) have emerged as one of the most outstanding innovated and functional materials for electrochemical application. Here, the structure of novel MOFs‐derived hierarchically porous Nickel@Carbon nanospheres (HP‐Ni@C‐N) synthesized via pyrolysis after the solvothermal reaction is discussed. The method includes the decomposition of the trimesic acid as an organic molecule at a specific temperature of transformation into a carbon matrix wrapping of nickel nanoparticles (Ni NPs). Furthermore, HP‐Ni@C‐N supported on nickel foam as an electrochemical energy storage supercapacitor application and obtained 912 F g−1 at 10 mV s−1 is reported. Interestingly, the covalent bridge between the Ni core and carbon shell facilitates the faster ions transportation. Therefore, it is presumed that this work can be informative and elucidative for the construction of MOFs‐derived transition metals hybrid nanostructures.

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Section: Introductionmentioning

confidence: 99%

A Core‐Shell Assembly of Hierarchical Porous Ni@C Nanospheres Synthesized from Metal‐Organic Framework for Electrochemical Energy Application

Kumar

Kim

Jeong

et al. 2019

Physica Status Solidi (a)

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“…The accelerated development of portable electronic devices has stimulated worldwide demand for progressive improvements of energy storage systems . Advanced electrochemical technologies, such as metal–air batteries, lithium‐ion batteries, and supercapacitors, are identified as the most promising candidates for portable and mobile applications to date. Notably, in contrast to batteries with closed systems, zinc–air batteries, which are made of a half‐closed structure to use oxygen from the atmosphere as the reactant at the positive electrode, demonstrate high theoretical energy density, as the reactant is stored outside the battery .…”

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confidence: 99%

Facilitated Oxygen Chemisorption in Heteroatom‐Doped Carbon for Improved Oxygen Reaction Activity in All‐Solid‐State Zinc–Air Batteries

et al. 2017

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Driven by the intensified demand for energy storage systems with high-power density and safety, all-solid-state zinc-air batteries have drawn extensive attention. However, the electrocatalyst active sites and the underlying mechanisms occurring in zinc-air batteries remain confusing due to the lack of in situ analytical techniques. In this work, the in situ observations, including X-ray diffraction and Raman spectroscopy, of a heteroatom-doped carbon air cathode are reported, in which the chemisorption of oxygen molecules and oxygen-containing intermediates on the carbon material can be facilitated by the electron deficiency caused by heteroatom doping, thus improving the oxygen reaction activity for zinc-air batteries. As expected, solid-state zinc-air batteries equipped with such air cathodes exhibit superior reversibility and durability. This work thus provides a profound understanding of the reaction principles of heteroatom-doped carbon materials in zinc-air batteries.

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“…The integration process often requires judicious surface modification of the scaffold materials to create specific interactions (e.g., covalent bonding, π–π stacking) with the EAP, and a lengthy screening process to determine the reaction conditions for the growth of a certain EAP on the scaffold. A few less common methods based on deliberate synthetic strategies for improving EAP stability have also been demonstrated, such as creation of supramolecular structures, synthesis of hyperbranched EAPs, and dopant/EAP engineering . These scaffolding and synthetic approaches have shown great promise when applied to certain types of EAP systems, but are highly dependent on the chemical nature of the EAP.…”

Section: Introductionmentioning

confidence: 99%

“…We hypothesize that an EAP system, whose microstructure is confined conformally by an ultrathin elastic polymer network, would exhibit improved morphological integrity, leading to low extents of structural pulverization and ion channel collapse. In contrast to the scaffolding and synthetic approaches studied extensively in the past, our soft confinement approach is applicable independently of the surface chemistry and morphology of the EAPs to be stabilized, and hence can be used flexibly in various types of EAP systems with different structures for a range of applications. The concept of soft confinement is illustrated schematically in Figure .…”

Section: Introductionmentioning

confidence: 99%

Enhancing Performance Stability of Electrochemically Active Polymers by Vapor‐Deposited Organic Networks

Mao

Liu

Tian

et al. 2018

Adv Funct Materials

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Performance stability of electrochemically active polymers (EAPs) remains one of the greatest and long-standing challenges with regard to EAP-based technologies for a myriad of energy, biomedical, and environmental applications. The performance instability of EAPs originates from their structural alteration under repeated charge-discharge cycling and/or flexing. In this work, a conceptually new "soft confinement" strategy to enhance EAP performance stability, including cyclic and mechanical, by using rationally designed, vapor-deposited organic networks is presented. These chemically cross-linked networks, when in contact with an electrolyte solution, turn into ultrathin, elastic hydrogel coatings that encapsulate conformally the EAP micro-/nanostructures. Such hydrogel coatings allow easy passage of ions that intercalate with EAPs, while simultaneously mitigating the structural pulverization of the EAPs and/or their detachment from substrates. Fundamentally distinct from extensively studied "scaffolding" or "synthetic" approaches to stabilizing EAPs, this soft confinement strategy relies on a postmodification step completely decoupled from the EAP synthesis/fabrication, and enjoys the unique advantage of substrate-independency. Hence, this strategy is broadly applicable to various types of EAPs. The proposed stability enhancement strategy is demonstrated to be effective for a range of EAP systems with differing chemical and morphological characteristics under various testing conditions (repeated charging/discharging, bending, and twisting). electronic devices. [14][15][16] Possible mecha nisms causing the cycling instability of EAPs include structural pulverization due to repeated swelling and shrinkage of polymer backbones, and collapse of initially present ion channels resulting in difficulty of subsequent redoping. [14,[17][18][19][20] A widely adopted approach to enhancing EAP stability is integration of the EAPs with conductive scaffolds, such as porous graphite foams, [21] carbon nanotube sponges, [22] nickel foams, [23] and partially exfoliated graphite. [18] These scaffolds are usually porous and dimensionally stable, and thus act as robust supports for EAP films to reduce their structural alteration. Such a "scaffolding" approach relies on effective hybridization of the EAP with the underlying conductive substrate, a non trivial task. The integration process often requires judicious surface modification of the scaffold materials to create specific interactions (e.g., covalent bonding, π-π stacking) with the EAP, and a lengthy screening process to determine the reac tion conditions for the growth of a certain EAP on the scaffold. A few less common methods based on deliberate synthetic strategies for improving EAP stability have also been dem onstrated, such as creation of supramolecular structures, [24] synthesis of hyperbranched EAPs, [25] and dopant/EAP engi neering. [26,27] These scaffolding and synthetic approaches have shown great promise when applied to certain types of EAP sys tems, but are highly...

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A Porous Perchlorate‐Doped Polypyrrole Nanocoating on Nickel Nanotube Arrays for Stable Wide‐Potential‐Window Supercapacitors

Cited by 182 publications

References 68 publications

A Core‐Shell Assembly of Hierarchical Porous Ni@C Nanospheres Synthesized from Metal‐Organic Framework for Electrochemical Energy Application

A Core‐Shell Assembly of Hierarchical Porous Ni@C Nanospheres Synthesized from Metal‐Organic Framework for Electrochemical Energy Application

Facilitated Oxygen Chemisorption in Heteroatom‐Doped Carbon for Improved Oxygen Reaction Activity in All‐Solid‐State Zinc–Air Batteries

Enhancing Performance Stability of Electrochemically Active Polymers by Vapor‐Deposited Organic Networks

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