A flexible asymmetric supercapacitor with organohydrogel electrolyte for high voltage operation over wide temperature range

Kang, Halim; Lee, Han-Chan; Jung, Gyusung; Keum, Kayeon; Kim, Joo Young; Kim, Jung Wook; Kim, Somin; Kim, Jeongwon; Ha, Jeong Sook

doi:10.1016/j.apsusc.2023.158150

Cited by 10 publications

(4 citation statements)

References 64 publications

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“…The Ragone plot of the Mn-Co 9 S 8 NPAs∥AC HSC is illustrated in Figure 5e. The HSC device exhibits a maximum energy density of 73.1 Wh kg −1 at a power density of 737.5 W kg −1 and maintains 36.1 Wh kg −1 at 6840.2 W kg −1 , which is higher than that of the recently reported HSCs, such as Co 0.85 Se@Ni 3 S 2 /CC∥BPC (696.2 W kg −1 and 65.7 Wh kg −1 ), 45 CuS/CdS∥AC (798.1 W kg −1 and 34.9 Wh kg −1 ), 46 MWCNT/CoS∥AC (750.0 W kg −1 and 31.6 Wh kg −1 ), 47 NiCo 2 O 4 @MnO 2 ∥NCF (850.1 W kg −1 and 51.1 Wh kg −1 ), 48 and NiCoP/WSe 2 @ZnS∥AC (1064.2 W kg −1 and 46.4 Wh kg −1 ) 49 (Table S2). Moreover, Figure 5f shows that the HSC can exhibit almost 98.2% capacitance retention after 5000 cycles, indicating its excellent stability and feasibility.…”

Section: Electrochemical Performances Of the Mn-co 9 S 8 Npas Electrodementioning

confidence: 99%

Electroactivated Modulation of Highly Aligned Manganese-Doped Cobalt Sulfide Nanoplate Arrays for High-Performance Hybrid Supercapacitors

Zhang,

Tian,

et al. 2024

ACS Appl. Energy Mater.

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Transition-metal sulfides have been identified as one of the promising cathode materials of battery type for hybrid supercapacitors (HSCs). However, there are still huge obstacles to their practical applications due to the major problems of poor structural stability and limited redox active sites. In this work, a high-performance cathode material based on three-dimensional porous Mn-doped Co 9 S 8 nanoplate arrays (Mn-Co 9 S 8 NPAs) on Ni foam has been synthesized via a facile electroactivation-modified metal−organic framework selftemplating sulfurization strategy. It has been found that the introduction of Mn 2+ ions can guarantee the structural integrity of the nanoplate arrays and effectively reduce the electron density near Co sites. By the synergistic modulation of the geometric and electronic structures, the Mn-Co 9 S 8 NPAs electrode delivers an ultrahigh capacity of 569.4 mAh g −1 (4099.7 F g −1 ) at 1 A g −1 with superior cycling stability. An HSC assembled with the electrode materials exhibits a high energy density of 73.1 Wh kg −1 at a power density of 737.5 W kg −1 and yields a 98.2% capacitance retention after 5000 cycles, indicating robust cycling stability as well. This work demonstrates a doping engineering strategy to regulate the physicochemical properties of metal sulfides for efficient energy-storage and conversion applications.

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Section: Electrochemical Performances Of the Mn-co 9 S 8 Npas Electrodementioning

confidence: 99%

Electroactivated Modulation of Highly Aligned Manganese-Doped Cobalt Sulfide Nanoplate Arrays for High-Performance Hybrid Supercapacitors

Zhang,

Tian,

et al. 2024

ACS Appl. Energy Mater.

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“…When four devices were connected in parallel, the parallel devices adhered to the logic of the parallel circuit, resulting in a CV closed curve area that was almost four times larger than that of a single device, along with a charge−discharge time that increased by four times. 46 However, the voltage window remained unchanged, making it impossible to power a 1.5 V LED lamp. In the sequence of interdigitated electrode series circuits with an increasing number of series, both the CV and GCD voltages of the circuit exhibit multiple increases corresponding to the number of devices, in accordance with the logic of the series circuit.…”

Section: Resultsmentioning

confidence: 99%

“…The results revealed that in a parallel-connected interdigitated electrode circuit with an increasing number of parallel connections (see Figure d), the CV area and GCD charge–discharge time of the circuit changed linearly, corresponding to a multiple of the device count (Figure e). When four devices were connected in parallel, the parallel devices adhered to the logic of the parallel circuit, resulting in a CV closed curve area that was almost four times larger than that of a single device, along with a charge–discharge time that increased by four times . However, the voltage window remained unchanged, making it impossible to power a 1.5 V LED lamp.…”

Section: Resultsmentioning

confidence: 99%

Patterned Micro Flexible Supercapacitors based on the Rapid Transfer-Printing Method

Fan,

Liu,

Yin

et al. 2024

ACS Appl. Mater. Interfaces

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Developing a simple and rapidly preparative method for patterned flexible supercapacitors is essential and indispensable for the swift advancement of portable devices integrated with micro devices. In this study, we employed a cost-effective and rapid fabrication method based on transfer-printing technology to produce patterned micro flexible supercapacitors with various substrates. The resulting flexible micro supercapacitors not only allow for customized patterns with strong flexibility and resistance to bending, while maintaining a certain level of performance, but also facilitate the creation of diverse circuits to tailor voltage and current to specific requirements. Patterned micro flexible supercapacitors with a thickness of 0.02 mm, based on accordion-like Ti3C2T x MXene materials coated on a substrate, demonstrate a specific capacitance of 142.7 mF cm–2 at 0.5 mA cm–2. The devices exhibit satisfactory capacitance retention (91% after 5000 cycles) and superb mechanical flexibility (71% capacitance retention at 180° bending after 2000 cycles). At a power density of 2.9 mW cm–2, the energy density of the sandwich structure device reaches 126.8 μWh cm–2. This study is expected to contribute new ideas for the design and preparation of patterned flexible supercapacitors.

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“…First of all, traditional hydrogel electrolytes contain a large amount of solvent water, which will inevitably freeze at subzero temperatures, significantly weakening the ionic conductivity or even losing. Second, at high temperature or room temperature, the internal water molecules cannot exist stably and are volatile, resulting in a loss of performance. − Finally, the operating voltage of hydrogel electrolytes is generally just within a relatively small potential window (0.8–1.0 V), which is because when the voltage reaches 1.23 V, the water will split, limiting its energy density. , At present, the study of wide-temperature-resistant hydrogel electrolytes has made a breakthrough, but there are still some places that can be improved in this field. − The most common strategy is to introduce organic solvent (glycerin, dimethyl sulfoxide, and ethylene glycol) into hydrogels, , but the introduction of organogels using novel antifreeze is rarely reported. , At the same time, the introduction of organic solvents usually weakens the mechanical properties and ionic conductivity of the hydrogel electrolytes . So, designing a new gel electrolyte with a wide temperature range, excellent mechanical properties, and capacitive properties is a great challenge.…”

Section: Introductionmentioning

confidence: 99%

Wide-Temperature-Range Flexible Supercapacitors Using a Multipurpose Organogel Electrolyte

Ma,

Zhang,

Tang

et al. 2023

ACS Appl. Energy Mater.

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By introduction of poly(vinyl alcohol) (PVA), 4,4′-stilben dicarbo (4SD), and potassium Iodide (KI) into the mixed solvents of dimethyl sulfoxide (DMSO) and N,N-dimethylformamide (DMF), a PVA/4SD/KI organogel electrolyte is designed and prepared. DMSO and DMF can improve the operating temperature range of organogels and form conductive channels to promote the rapid transport of ions. KI can further enhance the energy density and conductivity of organogels. The prepared gel electrolytes exhibit excellent tensile capacity (tensile strain over 600%) and high ionic conductivity (30.12 mS cm −1 ). In addition, the supercapacitor based on the PVA/4SD/KI organogel has favorable electrochemical properties in the wide temperature range of −40 to 70 °C. On top of that, the organogel demonstrated superior stability and durability despite being destroyed (97.5% capacitance retention even when split). At the same time, the prepared organogel can be used as an information storage device for recording and erasing under ultraviolet and natural light.

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A flexible asymmetric supercapacitor with organohydrogel electrolyte for high voltage operation over wide temperature range

Cited by 10 publications

References 64 publications

Electroactivated Modulation of Highly Aligned Manganese-Doped Cobalt Sulfide Nanoplate Arrays for High-Performance Hybrid Supercapacitors

Electroactivated Modulation of Highly Aligned Manganese-Doped Cobalt Sulfide Nanoplate Arrays for High-Performance Hybrid Supercapacitors

Patterned Micro Flexible Supercapacitors based on the Rapid Transfer-Printing Method

Wide-Temperature-Range Flexible Supercapacitors Using a Multipurpose Organogel Electrolyte

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