Bioinspired Co3O4/graphene layered composite films as self-supported electrodes for supercapacitors

He, Chengen; Liang, Yachao; Gao, Pengyuan; Cheng, Long; Shi, Dean; Xie, Xiaolin; Li, Robert Kowk-Yiu; Yang, Yingkui

doi:10.1016/j.compositesb.2017.03.025

Cited by 42 publications

(6 citation statements)

References 57 publications

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“…Their results showed that ≈93% capacitance was maintained after 5000 cycles. He and Liang fabricated Co 3 O 4 flakes and the graphene composite paper by the self‐assembly method, with 87% of capacitance remaining after 1000 cycles. To further prove the contribution of RGO and Co 3 O 4 to the cycle stability performance of G—Co 3 O 4 —PPy, testing was continued for an additional 600 cycles.…”

Section: Resultsmentioning

confidence: 99%

Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors

Jiang

Luo

et al. 2019

Energy Tech

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Supercapacitors are of great importance for energy storage and have been the subject of intensive research in recent years, in which conductive polymers are used to make flexible and freestanding electrodes. However, their insufficient access to the electrolytes and the low chemical stability of these conductive polymers lead to their poor performance. To solve these issues, a facile method that can be used to synthesize freestanding composite film electrodes of reduced graphene oxide–cobalt oxide–polypyrrole (RGO—Co3O4—PPy) as supercapacitors is demonstrated. They exhibit a high specific capacitance of 532.8 F g−1 and nearly no degradation after 700 cycles of charging and discharging. The synergistic effect of Co3O4, RGO, and PPy is responsible for the superior property. The three‐phase composite electrode utilizes the RGO nanosheet as a substrate to provide a large surface area for loading Co3O4 nanoparticles and also to enhance the electron transfer. Furthermore, the deposition of PPy largely reduces the resistivity of RGO—Co3O4—PPy, and the introduction of Co3O4 nanoparticles significantly improves cycle stability.

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Section: Resultsmentioning

confidence: 99%

Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors

Jiang

Luo

et al. 2019

Energy Tech

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“…in addition Co 3 O 4 @graphene When the current density of the composite increases to 8.0 A/g, the initial capacitance of the composite remains 83%. [150] In addition to compounding with the above carbon materials, the three-dimensional carbon structure can be used as a composite electrode support to provide additional advantages for rapid ion transfer. Ke et al used 3D nanostructures derived from carbon nanotubes (fCNTs) and Co 3 O 4 nanowire arrays as composite materials for high-performance supercapacitors.…”

Section: Rabani Et Al Uniformly Formed Co 3 O 4 Nanoparticles On the ...mentioning

confidence: 99%

“…The unique layered structure enhances the synergistic effect between graphene and porous Co 3 O 4 sheets, Co 3 O 4 @graphene the film exhibits a high specific capacitance of 623.8 F/g in 2 M KOH, and has good cycle stability (the capacitance remains 87% after 1000 cycles). in addition Co 3 O 4 @graphene When the current density of the composite increases to 8.0 A/g, the initial capacitance of the composite remains 83% [150] …”

Section: Binary Compositementioning

confidence: 99%

Recent Progress in Co₃O₄‐Based Nanomaterials for Supercapacitors

Liu

Yang

et al. 2023

ChemNanoMat

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Supercapacitors which have been widely used in portable electronics and hybrid electric vehicles are considered to be fascinating energy storage devices owing to their higher energy density than traditional capacitors and higher power density than batteries. The performance of supercapacitors is much dependent on the properties of the used electrode materials, and much effort has been devoted to exploring high‐performance electrodes. During the past decade, cobalt‐based materials, especially Co3O4 and its composites, have been regarded as prominent electrode materials for supercapacitors in view of their relatively low cost, high theoretical specific capacitance, non‐toxicity, and excellent electrochemical activity. In this review, we attempt to provide some basic insights into the rational design of Co3O4 based materials/composites and their capacitive properties for supercapacitors. The electrochemical advantages of Co3O4 as a supercapacitor material are summarized, and many examples are illustrated. The remaining challenges in exploration of Co3O4‐based materials as efficient electrodes for supercapacitors are also discussed and the future research directions are offered.

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“…Based on the laminated assembly approach, multiple nanosheets could be employed as building blocks to co-construct hybrid films with tunable interspace and special functions. In this regard, some hybrid films such as MoS 2 /graphene [77] , C 3 N 4 /graphene [78,79] , Ti 3 C 2 T x /graphene [80] , MoO 3 /graphene [81] , Co 3 O 4 /graphene [82] , Al/graphene [83] , Sb/graphene [84] , and C 3 N 4 /MXenes [85] have been widely fabricated by laminated assembly approach and given rise to new synergic effects for en- ergy storage. As using the multiple nanosheets to construct hybrid films, the self-stacking of single nanosheets should be avoided.…”

Section: Laminated Assemblymentioning

confidence: 99%

Two-dimensional nanosheets as building blocks to construct three-dimensional structures for lithium storage

Zhang

Wang

et al. 2018

Journal of Energy Chemistry

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2D nanosheets such as graphene, silicene, phosphorene, metal dichalcogenides and MXenes are emerging and promising for lithium storage due to their ultrathin nature and corresponding chemical/physical properties. However, the serious restacking and aggregation of the 2D nanosheets are still hampering their applications. To circumvent the issues of 2D nanosheets, one efficient strategy is to construct 3D structures with hierarchical porous structures, good chemical/mechanical stabilities and tunable electrical conductivities. In this review, we firstly focus on the available synthetic approaches of 3D structures from 2D nanosheets, and then summarize the relationships between the microstructures of 3D structures built from 2D nanosheets and their electrochemical behaviors for lithium storage. On the basis of above results, some challenges are briefly discussed in the perspective of the development of various functional 3D structures.

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Bioinspired Co3O4/graphene layered composite films as self-supported electrodes for supercapacitors

Cited by 42 publications

References 57 publications

Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors

Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors

Recent Progress in Co₃O₄‐Based Nanomaterials for Supercapacitors

Two-dimensional nanosheets as building blocks to construct three-dimensional structures for lithium storage

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Bioinspired Co3O4/graphene layered composite films as self-supported electrodes for supercapacitors

Cited by 42 publications

References 57 publications

Freestanding RGO—Co3O4—PPy Composite Films as Electrodes for Supercapacitors

Freestanding RGO—Co3O4—PPy Composite Films as Electrodes for Supercapacitors

Recent Progress in Co3O4‐Based Nanomaterials for Supercapacitors

Two-dimensional nanosheets as building blocks to construct three-dimensional structures for lithium storage

Contact Info

Product

Resources

About

Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors

Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors

Recent Progress in Co₃O₄‐Based Nanomaterials for Supercapacitors