3D nitrogen-doped graphene foam with encapsulated germanium/nitrogen-doped graphene yolk-shell nanoarchitecture for high-performance flexible Li-ion battery

Mo, Runwei; Rooney, David; Sun, Kening; Yang, Hui Ying

doi:10.1038/ncomms13949

Cited by 358 publications

(215 citation statements)

References 56 publications

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“…There are three redox couples located at around 0.1/0.25 V, 0.9/1.3 V, and 1.4/2.1 V versus Li/Li + observed in the CV curve. The redox peaks of 0.1/0.25 V is owing to the intercalation of Li + into carbon, while the redox peaks of 0.9/1.3 V and 1.4/2.1 V may be ascribed to the reaction of Li + with CoN in the samples . Notably, the redox peaks of pure carbon can be both revealed at low potential and higher potentials in the range of 0.7/1.0 V and 1.5/2.0 V versus Li/Li + .…”

Section: Methodsmentioning

confidence: 91%

Carbon Necklace Incorporated Electroactive Reservoir Constructing Flexible Papers for Advanced Lithium–Ion Batteries

Rui

Chang

et al. 2017

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Metal-organic frameworks (MOFs) and their derivatives with well-defined structures and compositions show great potential for wide applications such as sensors, catalysis, energy storage, and conversion, etc. However, poor electric conductivity and large volume expansion are main obstacles for their utilization in energy storage, e.g., lithium-ion batteries and supercapacitors. Herein, a facile strategy is proposed for embedding the MOFs, e.g., ZIF-67 and MIL-88 into polyacrylonitrile fibers, which is further used as a template to build a 3D interconnected conductive carbon necklace paper. Owing to the unique structure features of good electric conductivity, interconnected frameworks, electroactive reservoir, and dual dopants, the obtained flexible electrodes with no additives exhibit high specific capacities, good rate capability, and prolonged cycling stability. The hollow dodecahedral ZIF-67 derived carbon necklace paper delivers a high specific capacity of 1200 mAh g and superior stability of more than 400 cycles without capacity decay. Moreover, the spindle-like MIL-88 derived carbon necklace paper shows a high reversible capacity of 980 mAh g . Their unique 3D interconnected structure and outstanding electrochemical performance pave the way for extending the MOF-based interweaving materials toward potential applications in portable and wearable electronic devices.

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Section: Methodsmentioning

confidence: 91%

Carbon Necklace Incorporated Electroactive Reservoir Constructing Flexible Papers for Advanced Lithium–Ion Batteries

Rui

Chang

et al. 2017

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“…Among the graphene‐derived functional materials, high‐strength and lightweight graphene foams gather a lot of attention . Actually, they have constituted a new type of carbon materials showing many interesting properties, largely expanding the applications of graphene . Graphene foams can be judiciously combined with various kinds of polymers like epoxy resin, poly(dimethyl siloxane), polyimide, and polyaniline to construct multi‐functional hybrids.…”

Section: Methodsmentioning

confidence: 99%

A One‐Pot Polymerization for Concurrently Inducing Predominant Helicity in Optically Inactive Helical Polymer and Constructing Graphene‐Based Chiral Hybrid Foams

Song

et al. 2019

Macromol. Rapid Commun.

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Synthetic chiral helical polymers have achieved impressive progress in past few decades. Unfortunately, how to construct chiral helical polymer‐derived functional materials still remains highly challenging. The present contribution reports an unprecedented, one‐step strategy for judiciously combining chiral helical polymer with graphene to construct chiral hybrid foams. Graphene oxide (GO), ascorbic acid (L‐AA), Rh catalyst, and an achiral acetylenic monomer bearing phenylboronic acid group are mixed in an aqueous dispersion. Under mild conditions, the monomer underwent polymerization; meanwhile GO transforms into reduced graphene oxide (RGO) which in situ self‐assembles to construct a 3D porous structure. Herein, L‐AA simultaneously plays double roles: 1) working as a chiral source for the monomer to undergo helix‐sense‐selective polymerization or transferring its chirality to the polymer chains via forming borate structure; and 2) working as a reducing agent for reducing GO. The preparation strategy combines four processes into one single step: monomer polymerization, chirality transfer, reduction of GO, and RGO's self‐assembly. The eventually obtained chiral hybrid foams demonstrate advantages of porous structure, chirality, and reversible borate functional groups. The established preparation strategy promises a potent platform for conveniently constructing advanced chiral polymeric materials and even chiral hybrids starting from achiral monomers.

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“…Furthermore, there has been increasing volume in the research of carbon‐based materials as current collectors. For example, CNTs, carbon textiles, and graphene derivatives have been mainly reported because their interconnected networks can maintain the high electrical property upon flexing. A variety of hierarchical assemblies of CNTs for flexible LIBs were reported by Volder and co‐workers, and they suggested the several possible architectures for CNTs current collectors with high flexibility .…”

Section: Recent Progress In Flexible Lithium‐ion Batteriesmentioning

confidence: 99%

Issues and Challenges Facing Flexible Lithium‐Ion Batteries for Practical Application

Cha

Kim

Lee

et al. 2017

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With the advent of flexible electronics, lithium-ion batteries have become a key component of high performance energy storage systems. Thus, considerable effort is made to keep up with the development of flexible lithium-ion batteries. To date, many researchers have studied newly designed batteries with flexibility, however, there are several significant challenges that need to be overcome, such as degradation of electrodes under external load, poor battery performance, and complicated cell preparation procedures. In addition, an in-depth understanding of the current challenges for flexible batteries is rarely addressed in a systematical and practical way. Herein, recent progress and current issues of flexible lithium-ion batteries in terms of battery materials and cell designs are reviewed. A critical overview of important issues and challenges for the practical application of flexible lithium-ion batteries is also provided. Finally, the strategies are discussed to overcome current limitations of the practical use of flexible lithium-based batteries, providing a direction for future research.

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3D nitrogen-doped graphene foam with encapsulated germanium/nitrogen-doped graphene yolk-shell nanoarchitecture for high-performance flexible Li-ion battery

Cited by 358 publications

References 56 publications

Carbon Necklace Incorporated Electroactive Reservoir Constructing Flexible Papers for Advanced Lithium–Ion Batteries

Carbon Necklace Incorporated Electroactive Reservoir Constructing Flexible Papers for Advanced Lithium–Ion Batteries

A One‐Pot Polymerization for Concurrently Inducing Predominant Helicity in Optically Inactive Helical Polymer and Constructing Graphene‐Based Chiral Hybrid Foams

Issues and Challenges Facing Flexible Lithium‐Ion Batteries for Practical Application

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