Hierarchical NiCo<sub>2</sub>O<sub>4</sub> nanosheets/nitrogen doped graphene/carbon nanotube film with ultrahigh capacitance and long cycle stability as a flexible binder-free electrode for supercapacitors

Yue, Shihong; Tong, Hao; Lu, Liang; Tang, Weiwei; Bai, Wenlong; Jin, Fengqiao; Han, Qiwei; He, Jie; Liu, Jie; Zhang, Xiaogang

doi:10.1039/c6ta09128h

Cited by 135 publications

(33 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Carbon‐based supercapacitors have greatly attracted attention due to the large surface area, excellent conductivity, wide pore size distribution, and high cycle stability of carbon electrode materials . Main carbon electrode materials include 1D carbon nanotubes (CNTs), carbon fibers (CFs), 2D graphene, and 3D mes‐carbon .…”

Section: Introductionmentioning

confidence: 99%

Hierarchical 3D All‐Carbon Composite Structure Modified with N‐Doped Graphene Quantum Dots for High‐Performance Flexible Supercapacitors

Liu

Wang

et al. 2018

Small

111

View full text Add to dashboard Cite

Flexible supercapacitors have shown enormous potential for portable electronic devices. Herein, hierarchical 3D all-carbon electrode materials are prepared by assembling N-doped graphene quantum dots (N-GQDs) on carbonized MOF materials (cZIF-8) interweaved with carbon nanotubes (CNTs) for flexible all-solid-state supercapacitors. In this ternary electrode, cZIF-8 provides a large accessible surface area, CNTs act as the electrical conductive network, and N-GQDs serve as highly pseudocapactive materials. Due to the synergistic effect and hierarchical assembly of these components, N-GQD@cZIF-8/CNT electrodes exhibit a high specific capacitance of 540 F g at 0.5 A g in a 1 m H SO electrolyte and excellent cycle stability with 90.9% capacity retention over 8000 cycles. The assembled supercapacitor possesses an energy density of 18.75 Wh kg with a power density of 108.7 W kg . Meanwhile, three supercapacitors connected in series can power light-emitting diodes for 20 min. All-solid-state N-GQD@cZIF-8/CNT flexible supercapacitor exhibits an energy density of 14 Wh kg with a power density of 89.3 W kg , while the capacitance retention after 5000 cycles reaches 82%. This work provides an effective way to construct novel electrode materials with high energy storage density as well as good cycling performance and power density for high-performance energy storage devices via the rational design.

show abstract

Section: Introductionmentioning

confidence: 99%

Hierarchical 3D All‐Carbon Composite Structure Modified with N‐Doped Graphene Quantum Dots for High‐Performance Flexible Supercapacitors

Liu

Wang

et al. 2018

Small

111

View full text Add to dashboard Cite

show abstract

“…Despite several advances in the present device, high capacitance and wide potential window were the feature of high energy delivery. Our supercapacitor cell of high energy density was superior to recently reported ASCs such as bacterial cellulose derived carbon fiber@MnO 2 //N‐carbon fiber, graphene‐MnO 2 //graphene‐MoO 3, 3D‐CoO polypyrrole//AC, Ni(OH) 2 ‐graphite foam//graphite oxide, CuO‐MnO 2 //graphite oxide, RGO‐MnO 2 ‐few‐walled carbon nanotubes (FWCNT)//AC, RuO 2 ‐RGO//polyaniline (PANI)‐RGO, Ni(OH) 2 ‐carbon nanotubes (CNT)//AC, RGO‐MnO 2 //AC, RGO//MnO 2 , RGO‐TiO 2 //AC, N‐doped carbon‐MnO 2 // N ‐carbon‐PANI, NiMoO 4 //AC, NiCoAl‐NiCo carbonate hydroxide//AC, NiCo 2 S 4 ‐Nitrogen doped carbon foams (NCF)//NCF, NiCo 2 O 4 /NGN/CNT//NGN/CNT, and several electric double‐layer capacitors (EDLC) and pseudocapacitors. Such high energy storage capacity device must be a harbinger to bridge the gaps of the batteries and traditional supercapacitors, which can desirably widen the application in modern electronics.…”

Section: Resultsmentioning

confidence: 68%

Highly Nanoporous Nickel Cobaltite Hexagonal Nanostructure‐Graphene Composites for the Next Generation Energy Storage/Conversion Devices

Annamalai

Liu

Tao

2017

Adv Materials Inter

View full text Add to dashboard Cite

set forth to study their physicochemical properties of electroactive materials in order to uncover the bottlenecks and further achieve advances in next generation energy devices at low cost. [10] Synergistic effects widen the properties of binary metal oxides for the applications such as in catalyses, electronics, and sensors. Their abundant redox active sites and relatively higher conductivity than that of the monometal oxide can be also efficiently utilized to prepare active electrode materials of energy storage and conversion devices. [11][12][13][14][15][16] Among bimetal oxides, nickel cobaltite has received tremendous attention owning to its low cost, high activity, and good stability. Recently numerous NiCo 2 O 4 micro-and mesostructures such as nanosheets, nanowires, nanoneedles, nanorods, core ring nanoplates, and several hollow mesostructured materials were reported as potential energy device electrodes. [17][18][19][20][21][22][23][24] However, existing materials are still unsatisfactory in terms of energy delivery and activity. It is inevitably required to develop cheap and efficient materials for energy devices. Designing the architecture of an active material is always a great interest especially for energy devices. [25][26][27] It is recognized that favorable structure, easy mass storage, and high conductivity of the active materials can minimize the energy depletion at high current. Thus investigation of active materials tailored with these properties is demanded for modern energy devices.Here we reported a rational design for the controllable construction of spinel type nickel cobaltite-graphene nanostructures as high-performance energy storage/conversion electrodes. Plenty of chemical active sites originated from building blocks and sub-units imported great activity to the electrode materials, while large surface to bulk ratio enhanced the electrode-electrolyte contact. Interestingly, shell ring structures alleviated the volume changes during the continuous cycling process. Further, ample electrolyte storage and fast ion diffusion rate were identified to directly associate with large pore volume and complex pore structures. We used the resultant active electrode materials to fabricate symmetric supercapacitors (SSCs), which exhibited remarkable specific capacitance of 537 F g −1 and retained three fourth of original capacitance at 30 A g −1 . When these electrode materials were assembled as asymmetric supercapacitor (ASC) with the use of graphene-singleThe design and assembly of innovative heterostructures comprising of multifunctional properties are technically important for the applications in efficient energy devices. Here, a novel method is reported to construct hierarchical nanostructures as functional materials for the fabrication of high-performance energy devices. Optimized conditions and extensive spectroscopic studies are performed to understand the morphology evolution. Tunable structure, richer redox active sites, enhanced mass storage, and fast electron transfer cumulatively ensure ...

show abstract

“…The interplanar distance of 0.29 nm was ascribed to the spinel lattice plane of (220), the spacingo f0 .23 nm corresponds to the characteristic crystal face of (222), and the interval of 0.24 nm was mirrored in the crystallographic plane of (311). [33] Sixd istinct diffraction rings were clearly observed and annotated one by one in Figure 4c,i ndicating the high purity and crystallinity of NiCo 2 O 4 @AMCRs. [34] All the diffractive rings identified that the synthetic outcomes were absolutec ubic spinel NiCo 2 O 4 ,w hich crystallized in the Fd-3m space group.…”

Section: Resultsmentioning

confidence: 80%

Transition‐Metal Oxides Anchored on Nitrogen‐Enriched Carbon Ribbons for High‐Performance Pseudocapacitors

Pang

Zhang

Chen

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

Increasing demand for effective energy-storage systems derived from low-cost and ecofriendly raw materials has aroused wide concern. In this contribution, we propose nitrogen-abundant amorphous micron-sized carbon ribbons (AMCRs) originating from biomass raupo as a novel substrate due to their specific quasi 2D morphologies and outstanding dispersion ability. Owing to the innate nitrogen atoms on the surface of AMCRs, ultrathin binary and ternary metal oxide (NiO, CoO, and NiCo O ) nanosheets can be uniformly developed under benign conditions. These three composites were separately fabricated as electrodes for supercapacitors in a three-electrode system and exhibited favorable activities. Among them, the ternary metal oxide composites NiCo O @AMCRs delivered the supreme specific capacitance of 1691 F g and best cycling stability (89 % capacity retention over 10,000 cycles). Moreover, symmetric supercapacitors (NiCo O @AMCRs//NiCo O @AMCRs) were assembled inside sleeve devices with 2 m KOH aqueous electrolyte, which demonstrated admirable cyclic stability (79.1 % capacity retention over 8,000 cycles), and an excellent energy density of 26 Wh kg at the power density of 1.8 kW kg .

show abstract

Hierarchical NiCo₂O₄ nanosheets/nitrogen doped graphene/carbon nanotube film with ultrahigh capacitance and long cycle stability as a flexible binder-free electrode for supercapacitors

Abstract: Developing flexible and lightweight energy storage systems for miniaturized electronic equipment and high volumetric performance is arousing increasing interest.

Cited by 135 publications

References 59 publications

Hierarchical 3D All‐Carbon Composite Structure Modified with N‐Doped Graphene Quantum Dots for High‐Performance Flexible Supercapacitors

Hierarchical 3D All‐Carbon Composite Structure Modified with N‐Doped Graphene Quantum Dots for High‐Performance Flexible Supercapacitors

Highly Nanoporous Nickel Cobaltite Hexagonal Nanostructure‐Graphene Composites for the Next Generation Energy Storage/Conversion Devices

Transition‐Metal Oxides Anchored on Nitrogen‐Enriched Carbon Ribbons for High‐Performance Pseudocapacitors

Contact Info

Product

Resources

About

Hierarchical NiCo2O4 nanosheets/nitrogen doped graphene/carbon nanotube film with ultrahigh capacitance and long cycle stability as a flexible binder-free electrode for supercapacitors

Abstract: Developing flexible and lightweight energy storage systems for miniaturized electronic equipment and high volumetric performance is arousing increasing interest.

Cited by 135 publications

References 59 publications

Hierarchical 3D All‐Carbon Composite Structure Modified with N‐Doped Graphene Quantum Dots for High‐Performance Flexible Supercapacitors

Hierarchical 3D All‐Carbon Composite Structure Modified with N‐Doped Graphene Quantum Dots for High‐Performance Flexible Supercapacitors

Highly Nanoporous Nickel Cobaltite Hexagonal Nanostructure‐Graphene Composites for the Next Generation Energy Storage/Conversion Devices

Transition‐Metal Oxides Anchored on Nitrogen‐Enriched Carbon Ribbons for High‐Performance Pseudocapacitors

Contact Info

Product

Resources

About

Hierarchical NiCo₂O₄ nanosheets/nitrogen doped graphene/carbon nanotube film with ultrahigh capacitance and long cycle stability as a flexible binder-free electrode for supercapacitors