Integrated Construction Improving Electrochemical Performance of Stretchable Supercapacitors Based on Ant‐Nest Amphiphilic Gel Electrolytes

Mu, Hongchun; Zhang, Zekai; Lian, Cheng; Tian, Xiaohui; Wang, Gengchao

doi:10.1002/smll.202204357

Cited by 12 publications

(2 citation statements)

References 46 publications

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“…In spite of this great progress, flexible SCs still suffer from poor energy output and long cyclic stability that limits their application. And therefore, proper design of the structure of electrode materials in SCs and the stability of electrolytes are the primary criteria in their development [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Polybenzoxazine-Based Nitrogen-Containing Porous Carbon and Their Composites with NiCo Bimetallic Oxides for Supercapacitor Applications

Periyasamy,

Asrafali,

Kim

et al. 2024

Polymers

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Supercapacitors (SCs) are considered as emerging energy storage devices that bridge the gap between electrolytic capacitors and rechargeable batteries. However, due to their low energy density, their real-time usage is restricted. Hence, to enhance the energy density of SCs, we prepared hetero-atom-doped carbon along with bimetallic oxides at different calcination temperatures, viz., HC/NiCo@600, HC/NiCo@700, HC/NiCo@800 and HC/NiCo@900. The material produced at 800 °C (HC/NiCo@800) exhibits a hierarchical 3D flower-like morphology. The electrochemical measurement of the prepared materials was performed in a three-electrode system showing an enhanced specific capacitance for HC/NiCo@600 (Cs = 1515 F g−1) in 1 M KOH, at a current density of 1 A g−1, among others. An asymmetric SC device was also fabricated using HC/NiCo@800 as anode and HC as cathode (HC/NiCo@600//HC). The fabricated device had the ability to operate at a high voltage window (~1.6 V), exhibiting a specific capacitance of 142 F g−1 at a current density of 1 A g−1; power density of 743.11 W kg−1 and energy density of 49.93 Wh kg−1. Altogether, a simple strategy of hetero-atom doping and bimetallic inclusion into the carbon framework enhances the energy density of SCs.

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Section: Introductionmentioning

confidence: 99%

Polybenzoxazine-Based Nitrogen-Containing Porous Carbon and Their Composites with NiCo Bimetallic Oxides for Supercapacitor Applications

Periyasamy,

Asrafali,

Kim

et al. 2024

Polymers

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“…As an important energy supply unit, shape-customizable micropower sources that DOI: 10.1002/adfm.202314060 combine energy storage capability and shape-design controllability have been explored as a means to match the growing flexible electronic products, which can offer unique advantages for applications in micro-robotic devices, wearable sensors, and implantable medical devices. [1][2][3][4][5][6][7] Among these micropower sources, aqueous-based rechargeable Zn ions micro-batteries (ZMBs) have attracted extensive attention due to their high Zn theoretical capacity of 819 mAh g −1 , low redox potential of −0.76 V versus SHE, low-cost, and high safety. [8][9][10][11][12] To date, for most existing ZMBs system, the energy storage process can be roughly divided into insertion-type and conversion-type according to different cathode materials.…”

Section: Introductionmentioning

confidence: 99%

All‐Direct Laser Patterning Zinc‐Based Microbatteries

Li,

Jin,

Wang

et al. 2023

Adv Funct Materials

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Miniature batteries with programmable shape and scalable functions can provide new opportunities in the design of highly compatible integrated circuits and flexible microelectronics. However, achieving these energy supply devices requires the precise formation of highly active electrode materials in a high‐resolution patterned area using appropriate construction protocols. Here, shape‐customizable zinc‐based microbatteries (MBs) using an all‐direct laser patterning (DLP) technique is demonstrated. Unlike conventional processing approaches, the DLP with high spatial‐resolution can not only enable template‐free and efficient arbitrary customizable fabrication of geometry patterns, such as circular, papercut, tropical fish, house shapes, among others, but also spontaneously create oxygen vacancies within micro‐electrode materials that are beneficial to increasing electrochemical active sites. The resultant Zn//MnO2 MBs deliver a high areal capacity of 0.57 mAh cm−2 and an energy density of 0.75 mWh cm−2, surpassing most available aqueous Zn‐based MBs and Li/Na‐based MBs. This strategy can also be extended to other battery systems, such as Zn//Co and Zn//Ag MBs. More importantly, these micro‐batteries are easily integrated into on‐chip electronic systems as built‐in power supply to be highly compatible with multiple sensing functionalities, which showcase accurately monitoring wrist bending, pulse beating, temperature, and moisture signals in humans.

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Tuning Internal Accessibility via Nanochannel Orientation of Mesoporous Carbon Spheres for High‐Rate Potassium‐Ion Storage in Hybrid Supercapacitors

Park,

Kim,

Lim

et al. 2024

Adv Funct Materials

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Enhancing the accessibility and utilization of active sites through mesopores in carbon anode materials is crucial for developing high‐power potassium‐ion hybrid supercapacitors (PIHCs). Here, a multiscale phase separation method combining block copolymer (BCP) microphase‐ and homopolymer (HP) macrophase‐separation is utilized to produce two model carbon materials with controlled mesopore orientation: open‐end (oe‐MCS) and closed‐end mesoporous carbon sphere (ce‐MCS). BCPs form identical cylindrical micelles, and HPs encapsulate these cylindrical micelles within spheres and control their orientations relative to the interface. This approach manipulates only the degree of mesopore openings in the MCS materials while maintaining all other factors at similar levels. Opening mesopores in carbon anode materials primarily enhances K+ adsorption capacity, reduces K+ diffusion length, and improves ion transport. Thus, oe‐MCS anode exhibits a higher specific capacity with a significant capacitive‐controlled contribution. The resulting PIHC device displays maximum energy and power densities of 103 Wh kg−1 and 12 300 W kg−1, respectively, along with capacity retention of 86.1% after 20 000 cycles at 2.0 A g−1. This study significantly advances the understanding of mesopore design to improve capacitive K+ storage in hard carbon materials, paving the way for the development of high‐power PIHCs.

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Integrated Construction Improving Electrochemical Performance of Stretchable Supercapacitors Based on Ant‐Nest Amphiphilic Gel Electrolytes

Cited by 12 publications

References 46 publications

Polybenzoxazine-Based Nitrogen-Containing Porous Carbon and Their Composites with NiCo Bimetallic Oxides for Supercapacitor Applications

Polybenzoxazine-Based Nitrogen-Containing Porous Carbon and Their Composites with NiCo Bimetallic Oxides for Supercapacitor Applications

All‐Direct Laser Patterning Zinc‐Based Microbatteries

Tuning Internal Accessibility via Nanochannel Orientation of Mesoporous Carbon Spheres for High‐Rate Potassium‐Ion Storage in Hybrid Supercapacitors

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