Carbon Nanotubes and Graphene for Flexible Electrochemical Energy Storage: from Materials to Devices

Lei, Wen; Li, Feng; Cheng, Hui‐Ming

doi:10.1002/adma.201504225

Cited by 618 publications

(350 citation statements)

References 259 publications

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“…The ultrathin layer-by-layer structure provides superior flexibility and maximizes the utilization of the active materials. The graphene layers between β-Ni(OH) 2 are beneficial for facilitating fast electron transfer, thus increasing the rate performance. In addition to combining the graphene film with pseudocapacitive materials at the nanoscale, direct doping of heteroatoms into carbon scaffolds also increases the pseudocapacitance [109][110][111].…”

Section: Graphene Filmsmentioning

confidence: 99%

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Recent advances in flexible supercapacitors based on carbon nanotubes and graphene

Zhang

2017

Sci. China Mater.

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Section: Graphene Filmsmentioning

confidence: 99%

“…To more easily and affordably use the above-mentioned energy sources, energy storage devices must be dramatically improved [1][2][3][4][5]. Rechargeable batteries and supercapacitors are the two most commonly used devices for energy storage, and have attracted persistent research attention over the last few decades [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Recent advances in flexible supercapacitors based on carbon nanotubes and graphene

Zhang

2017

Sci. China Mater.

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“…Therefore, developing flexible electrodes, especially flexible SIBs, to meet the ever-growing demands of flexible electronics is a most urgent task. Along with the avenues of research on flexible LIBs, [17][18][19][20][21] flexible SIBs have emerged as a rapidly growing and enormously promising field. In view of the rapidly booming attention on flexible SIBs, it is necessary to highlight the recent progress and perspectives.…”

Section: Introductionmentioning

confidence: 99%

“…In view of the rapidly booming attention on flexible SIBs, it is necessary to highlight the recent progress and perspectives. To the best of our knowledge, there have already been several excellent reviews devoted to SIBs [11][12][13][14][15][16] or flexible energy-storage devices, [17][18][19][20][21] but so far, there has been no comprehensive review focusing on flexible electrodes for SIBs up to now. Thus, the topic considered here is timely.…”

Section: Introductionmentioning

confidence: 99%

Flexible Electrodes for Sodium‐Ion Batteries: Recent Progress and Perspectives

et al. 2017

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accessible lithium reserves are in remote or in politically sensitive areas. [5] This fact should sound the alarm for the expanded application of LIBs, because the increasing demand for LIBs could cause the price of lithium to skyrocket. It is even predicted that the world will run out of lithium supplies in the foreseeable future. [6][7][8] It is well known that sodium resources are more abundant (abundance: 23.6 × 10 3 mg kg −1 vs 20 mg kg −1 ) and vast (for example, the United States alone possesses 23 billion tons of soda ash which is a sodium-containing precursor) than lithium analog. Additionally, the trona (about $135-165 per ton), which could be used to produce sodium carbonate, has much lower cost than lithium carbonate (about $5000 per ton in 2010). [9,10] These two features endow SIBs with fascinating advantages for large-scale EES applications in the near future. Without doubt, SIBs also face big challenges: performance improvement and technological innovation. Although sodium has similar physical and chemical properties to lithium, the larger ionic radius of sodium ions compared with that of lithium ions restricts the insertion and extraction of sodium ions from the host materials commonly explored for LIBs. To address this problem, optimizing the chemical composition, tailoring the lattice structures, and regulating the morphologies of the host materials seem to be the most applicable strategies, and there have already been several excellent reviews. [11][12][13][14][15][16] As for technological innovation, the traditional fabrication processes mainly based on the slurrycasting method not only make SIBs typically rigid, thick, bulky, and heavy, but also reduce the overall volumetric/gravimetric energy density of the electrode. In the traditional slurry-casting method, the binders are insulating and electrochemically inactive, which can not only decrease the electrical conductivity, but also has a detrimental effect on the cycling stability resulting from some side effects between the electrolyte and inactive materials. In addition, the heavy weight of the binders, conductive additives and current collectors also reduces the volumetric/ gravimetric energy density of the overall electrode. Therefore, to enhance the battery performance and simplify the preparation process, the traditional slurry-casting method should be improved or even replaced; in other words, avoiding the use of binder, conductive additive, and metal current collector.In contrast, flexible electrodes are usually made from various active materials built on flexible conductive substrates without binder, conductive additive, and even metal current collector, Sodium-Ion Batteries

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“…As for stretchable LIBs, novel intrinsically stretchable materials such as carbon nanotubes or graphene have been attempted, but could hardly compete with the traditional active materials. [79,80] Therefore, the current research directions to construct stretchable LIBs mainly concentrate on the structural design of conventional LiCoO 2 (LCO), LiMn 2 O 4 (LMO), and Li 4 Ti 5 O 12 (LTO), or the composite of conventional materials with intrinsically stretchable materials. [81] Similar to supercapacitors, structural design including wavy configuration, fibre configuration, porous/textile configurations, and serpentine bridge-island configurations have been applied for the fabrication of stretchable LIBs.…”

Section: Stretchable Lithium-ion Batteriesmentioning

confidence: 99%

Toward Soft Skin‐Like Wearable and Implantable Energy Devices

Gong

Cheng

2017

Advanced Energy Materials

191

130

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The development of ultra‐compliant power sources is crucial for their seamless integration with next‐generation skin‐like wearable and implantable biomedical systems for long‐term health monitoring. Toward this goal, stretchable energy storage and conversion devices (ESCDs), including supercapacitors, lithium‐ion batteries (LIBs), solar cells, and generators are now attracting intensive worldwide research efforts. The purpose of this review is to discuss the latest achievements in the development of such stretchable energy devices in the context of biomedical applications. We first review the viable strategies and methodologies of fabricating stretchable energy storage and conversion devices. Then, we focus on description of various types of soft energy devices from a materials point of view. Furthermore, we discuss the challenges and opportunities in the design of truly conformal soft energy systems, including various key parameters, such as energy density, stability, and scalability.

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Carbon Nanotubes and Graphene for Flexible Electrochemical Energy Storage: from Materials to Devices

Cited by 618 publications

References 259 publications

Recent advances in flexible supercapacitors based on carbon nanotubes and graphene

Recent advances in flexible supercapacitors based on carbon nanotubes and graphene

Flexible Electrodes for Sodium‐Ion Batteries: Recent Progress and Perspectives

Toward Soft Skin‐Like Wearable and Implantable Energy Devices

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