Towards flexible solid-state supercapacitors for smart and wearable electronics

Dubal, Deepak P.; Chodankar, Nilesh R.; Kim, Do‐Heyoung; Gómez‐Romero, Pedro

doi:10.1039/c7cs00505a

Cited by 1,425 publications

(733 citation statements)

References 683 publications

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“…Studies on fibre-based supercapacitors have mainly focused on the development of novel electrode materials that can be formed as a fibre as they have a critical impact on the electrochemical performance of the supercapacitor [7,8]. Carbon nanomaterials (typically, carbon nanotubes (CNT) or graphene) have many properties that make them suitable for wearable electrodes including being lightweight and possessing high mechanical strength together with good electrical conductivity that permits fast charge transport.…”

Section: Introductionmentioning

confidence: 99%

Ternary composite solid-state flexible supercapacitor based on nanocarbons/manganese dioxide/PEDOT:PSS fibres

García-Torres

Crean

2018

Materials & Design

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Flexible fibre supercapacitors were fabricated by wet-spinning from carbon nanotube/carbon black dispersions, followed by straightforward surface treatments to sequentially deposit MnO2 and PEDOT:PSS to make ternary composite fibres. Dip coating the fibres after the initial wet-spinning coagulation creates a simple solution-based continuous process to produce fibre-based energy storage. Well-controlled depositions were achieved and have been optimised at each stage to yield the highest specific capacitance. A single ternary composite fibre exhibited a specific capacitance of 351 F g-1. Two ternary composite fibre electrodes were assembled together in a parallel solid-state device, with polyvinyl alcohol/H3PO4 gel used as both an electrolyte and a separator. The assembled flexible device exhibited a high specific capacitance of 51.3 F g-1 with excellent both charge-discharge cycling (84.2% capacitance retention after 1000 cycles) and deformation cycling stability (82.1% capacitance retention after 1000 bending cycles). *Graphical Abstract Click here to download high resolution image Highlights

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Section: Introductionmentioning

confidence: 99%

Ternary composite solid-state flexible supercapacitor based on nanocarbons/manganese dioxide/PEDOT:PSS fibres

García-Torres

Crean

2018

Materials & Design

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“…One promising approach comes from the family of hybrid metal-ion SCs (Li + , [95,96] Na + , [97] K + , [57] and even Al 3+ [98] ), which exhibits remarkable energy storage. [100] The development of flexible solidstate SCs [101] and printed and fiber-shaped supercapacitors with desirable size and morphology [102][103][104] constitute major steps toward the integration of SCs into wearable and flexible (micro) electronic devices following the needs of the technology market. Another promising approach involves switching from the classic design of SCs as static systems to the concept of "electrochemical flow SCs" by employing flowable electrodes, which provide new opportunities for scalability, high power density, and long lifetime.…”

Section: Wwwadvsustainsyscommentioning

confidence: 99%

Research Frontiers in Energy‐Related Materials and Applications for 2020–2030

Blay

Galian

Mureşan

et al. 2020

Advanced Sustainable Systems

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structure was found for the first time in a mineral composed by CaTiO 3 in 1839. Since then, multiple metal oxide perovskites (AMO 3 ) were developed, which have interesting properties for ferroelectric, superconductive, and pyroelectric applications. Metal halide perovskites (X is a halide anion such as Cl − , Br − , or I − ), which were developed later, display promising semiconducting properties. In particular, lead halide perovskites (APbX 3 ) are the most widely studied perovskite composition and are classified according to the A cation into hybrid perovskites (methylammonium bromide, MA or formamidinium, FA) and all-inorganic perovskites (cesium, Cs). [2] The electronic properties of the perovskites are related to the M-X bond, while the size of the A cation can introduce crystal distortion and change the symmetry of the ideal cubic crystal structure. [3] Interestingly, by using a large A organic cation, low-dimensional halide perovskites can be formed, including 2D sheets, 1D chains, or 0D clusters. [4] Lead halide perovskites are revolutionizing photovoltaic technology thank to their outstanding optical and electronic properties, low cost, and simple preparation. Compared to silicon-based technology, perovskites are prepared from more abundant and low-cost precursors. The superior performance and high efficiency of perovskite-based solar cells (PSC) are due to i) high optical absorption coefficient, ii) long carrier diffusion length This article delineates the state of the art for several materials used in the harvest, conversion, and storage of energy, and analyzes the challenges to be overcome in the decade ahead for them to reach the market and benefit society. The materials covered have had a special interest in recent years and include perovskites, materials for batteries and supercapacitors, graphene, and materials for hydrogen production and storage. Looking at the common challenges for these different systems, scientists in basic research should carefully consider commercial requirements when designing new materials. These include cost and ease of synthesis, abundance of precursors, recyclability of spent devices, toxicity, and stability. Improvements in these areas deserve more attention, as they can help bridge the gap for these technologies and facilitate the creation of partnerships between academia and industry. These improvements should be pursued in parallel with the design of novel compositions, nanostructures, and devices, which have led most interest during the past decade. Research groups are encouraged to adopt a cross-disciplinary mindset, which may allow more efficient use of existing knowledge and facilitate breakthrough innovation in both basic and applied research of energy-related materials.

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“…[30,31] While MSCs exhibiting high flexibility and mechanical resilience have been reported, they are either too bulky, [27,32] or the devices display limited electrochemical performance. Thin MSCs that can withstand folding without significant degradation in performance are highly sought.…”

Section: Flexible Asymmetric Microsupercapacitors From Freestanding Hmentioning

confidence: 99%

Flexible Asymmetric Microsupercapacitors from Freestanding Hollow Nickel Microfiber Electrodes

Morag

Jelinek

2018

Adv Elect Materials

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The increasing demand for flexible and wearable microelectronics is a major driving force for the development of high‐performance small‐volume energy sources. Microsupercapacitors exhibit significant potential in energy storage as they provide high power and good cycle stability. Yet, most microsupercapacitors display low energy densities limiting their practical use in microelectronics. Here, synthesis of high surface area freestanding electrodes comprising hollow nickel microfibers is demonstrated. The microfiber nickel electrodes constitute a platform for flexible asymmetric microsupercapacitors exhibiting excellent mechanical resilience as well as high energy density (0.11 mWh cm−2) and power density (37.5 mW cm−2). The freestanding nature and extensive surface area of the electrodes contribute to pronounced areal and volumetric capacitance, energy storage values, and stability after numerous (hundreds) physical bending cycles. The simple preparation scheme and use of an inexpensive building block (e.g., nickel) underscore potential uses as light and flexible energy storage devices.

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Towards flexible solid-state supercapacitors for smart and wearable electronics

Cited by 1,425 publications

References 683 publications

Ternary composite solid-state flexible supercapacitor based on nanocarbons/manganese dioxide/PEDOT:PSS fibres

Ternary composite solid-state flexible supercapacitor based on nanocarbons/manganese dioxide/PEDOT:PSS fibres

Research Frontiers in Energy‐Related Materials and Applications for 2020–2030

Flexible Asymmetric Microsupercapacitors from Freestanding Hollow Nickel Microfiber Electrodes

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