A super-high energy density asymmetric supercapacitor based on 3D core–shell structured NiCo-layered double hydroxide@carbon nanotube and activated polyaniline-derived carbon electrodes with commercial level mass loading

Li, Xiaocheng; Shen, Juanjuan; Sun, Wei; Hong, Xuda; Wang, Rutao; Zhao, Xinqing; Yan, Xingbin

doi:10.1039/c5ta01292a

Cited by 168 publications

(69 citation statements)

References 51 publications

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“…[8][9] However, the hydroxide materials usually suffer from poor rate capability or limited cycle life. [11][12][13][14][15][16][17][18] For example, an electrode material fabricated by integrating Ni-Co double hydroxides/graphene composite with carbon nanotubes displayed superior rate capability (the double hydroxide showed a specific capacitance of 2360 F/g at 0.5 A/g and 2030 F/g at 20 A/g, with 86% retention when the current increased 40 times) and moderate cyclic stability (75% capacitance retention after 5000 cycles). 10 Great efforts have been devoted to improve performance of Ni-Co double hydroxides by integrating with carbon-based materials.…”

Section: Introductionmentioning

confidence: 99%

“…[11][12][13][14][15][16][17][18] For example, an electrode material fabricated by integrating Ni-Co double hydroxides/graphene composite with carbon nanotubes displayed superior rate capability (the double hydroxide showed a specific capacitance of 2360 F/g at 0.5 A/g and 2030 F/g at 20 A/g, with 86% retention when the current increased 40 times) and moderate cyclic stability (75% capacitance retention after 5000 cycles). 13 However, the development of pesudo-capacitve electrodes with comprehensive electrochemical properties, such as high capacity, high rate capability and good cycling life, is still a scientific challenge. This hybrid electrode also exhibited good stability with 81% capacitance retention after 2000 charge-discharge cycles.…”

Section: Introductionmentioning

confidence: 99%

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Integration of nickel–cobalt double hydroxide nanosheets and polypyrrole films with functionalized partially exfoliated graphite for asymmetric supercapacitors with improved rate capability

Song

Cai

et al. 2015

J. Mater. Chem. A

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High-rate asymmetric supercapacitors (ASCs) made of abundant and low-cost electrode materials and operating in safe aqueous electrolytes could be attractive for electrochemical energy storage. Here, we design a new type of ASC by using pseudo-capacitive nanomaterials, Ni-Co double hydroxide (Ni-Co DH) nanosheets and polypyrrole (PPy) film, for cathode and anode, respectively which were integrated with functionalized partial-exfoliated graphite (FEG) current collector.Benefiting from the "super highway" for fast electron/ion transportation in the hybrid systems, the as-prepared electrodes exhibit superior rate capability (2442 and 2039 F/g at 1 and 50 A/g, with 83.5% retention for Ni-Co DH; 560 and 441 F/g at 1 and 50 A/g, with 79% retention for PPy). The assembled ASC displays a high specific capacitance (261 F/g at 1 A/g) and excellent rate capability, 77% of its initial capacitance can be retained when the current density increases 30 times from 1 to 30 A/g. An energy density of 61.3 Wh/kg can be achieved by the ASC at 0.65 kW/kg. Even at an ultra-high power density of 19.5 kW/kg, the ASC can still deliver a high energy density of 47.2 Wh/kg. Through careful control of charges which can be stored in anode and cathode, cycling stability of the ASC is much improved, 91% capacitance retention can be achieved after 5000 charge-discharge cycles. These features demonstrate a new avenue for developing high-performance pseudocapacitive electrodes and rational assembly strategies for high power/energy density charge storage devices with good cycling stability.A high-rate asymmetric supercapacitor (ASC) was developped by employing high rate pseudo-capacitive nanomaterial/graphene hybrid electrode for both electrodes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integration of nickel–cobalt double hydroxide nanosheets and polypyrrole films with functionalized partially exfoliated graphite for asymmetric supercapacitors with improved rate capability

Song

Cai

et al. 2015

J. Mater. Chem. A

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“…The electricalc onductivity of the constructed composite electrode can be improved, and the efficiency or mass loading of electroactive LDH can also be enhanced. [68]…”

Section: Nanostructuresmentioning

confidence: 99%

“…CNTs, as one of the best known1 Dn anomaterials, are of low weight, excellent mechanical stability and electronic conductivity,a nd high chemical stability. [68] In recent years, with ad eep understanding of CNTsa nd CNT-based nanomaterials, their broad application prospects have been exploited. They are among perfect conductive substrates for active materials in energy storage, such as SCs, and energy conversion.…”

Section: Carbon Nanotubes (Cnts)mentioning

confidence: 99%

Recent Progress in Two‐Dimensional Layered Double Hydroxides and Their Derivatives for Supercapacitors

et al. 2020

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High‐performance supercapacitors have attracted great attention due to their high power, fast charging/discharging, long lifetime, and high safety. However, the generally low energy density and overall device performance of supercapacitors limit their applications. In recent years, the design of rational electrode materials has proven to be an effective pathway to improve the capacitive performances of supercapacitors. Layered double hydroxides (LDHs), have shown great potential in new‐generation supercapacitors, due to their unique two‐dimensional layered structures with a high surface area and tunable composition of the host layers and intercalation species. Herein, recent progress in LDH‐based, LDH‐derived, and composite‐type electrode materials targeted for applications in supercapacitors, by tuning the chemical/metal composition, growth morphology, architectures, and device integration, is reviewed. The complicated relationships between the composition, morphology, structure, and capacitive performance are presented. A brief projection is given for the challenges and perspectives of LDHs for energy research.

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“…Even though carbon core-shell-based materials have been explored for lithium-ion batteries, their application in supercapacitors is limited 21,22 . 3D core-shell nanostructured NiCo-LDH@CNTs carbon as electrode materials for supercapacitors exhibit a high specific capacitance of 1023 Cg −1 at 1 Ag −1 due its unique structural design, good electrical conductivity and large specific surface area 23 . Ni-Al LDH/CNT core-shell nanostructures have high surface area and exhibit a specific capacity of 1071 Cg −1 at a current density of 0.5 Ag −1 24 .…”

Section: Introductionmentioning

confidence: 99%

Rationally engineered 3D-dendritic cell-like morphologies of LDH nanostructures using graphene-based core–shell structures

et al. 2019

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Functionalization of graphene-based materials using chemical moieties not only modify the electronic structure of the underlying graphene but also enable in limited enhancement of targeted properties. Surface modification of graphene-based materials using other nanostructures enhances the effective properties by minimally modifying the properties of pristine graphene backbone. In this pursuit, we have synthesized bio-inspired hierarchical nanostructures based on Ni-Co layered double hydroxide on reduced graphene oxide core-shells using template based wet chemical approach. The material synthesized have been characterized structurally and electrochemically. The fabricated dendritic morphology of the composite delivers a high specific capacity of 1056 Cg −1. A cost effective solid state hybrid supercapacitor device was also fabricated using the synthesized electrode material which shows excellent performance with high energy density and fast charging capability.

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A super-high energy density asymmetric supercapacitor based on 3D core–shell structured NiCo-layered double hydroxide@carbon nanotube and activated polyaniline-derived carbon electrodes with commercial level mass loading

Abstract: An asymmetric supercapacitor device with an energy density of 89.7 W h kg−1 at commercial level mass loading was successfully fabricated.

Cited by 168 publications

References 51 publications

Integration of nickel–cobalt double hydroxide nanosheets and polypyrrole films with functionalized partially exfoliated graphite for asymmetric supercapacitors with improved rate capability

Integration of nickel–cobalt double hydroxide nanosheets and polypyrrole films with functionalized partially exfoliated graphite for asymmetric supercapacitors with improved rate capability

Recent Progress in Two‐Dimensional Layered Double Hydroxides and Their Derivatives for Supercapacitors

Rationally engineered 3D-dendritic cell-like morphologies of LDH nanostructures using graphene-based core–shell structures

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