Ultrafast hydrothermal assembly of nanocarbon microfibers in near-critical water for 3D microsupercapacitors

Zhai, Shengli; Wei, Li; Karahan, H. Enis; Wang, Yanqing; Wang, Chaojun; Montoya, Alejandro; Shao, Qian; Wang, Xin; Chen, Yuan

doi:10.1016/j.carbon.2018.02.089

Cited by 26 publications

(23 citation statements)

References 88 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrothermal/solvothermal synthesis is another most often used method to prepare binder‐free electrodes. Hydrothermal approach has unique advantages due to its precise and versatile morphological control, great flexibility in selection of building material precursors [58] . Materials normally exhibit higher solubility in water under high pressure and temperature environment in a hydrothermal system [59–60] .…”

Section: Synthesis Of Binder‐free Electrodes and Their Electrochemical Energy Storage Applicationsmentioning

confidence: 99%

Recent Progress in Binder‐Free Electrodes Synthesis for Electrochemical Energy Storage Application

Shen

Zhai

Wang

et al. 2021

Batteries & Supercaps

Self Cite

View full text Add to dashboard Cite

Fabrication of binder‐free electrodes is an effective way to increase the performance of electrochemical energy storage (EES) devices, such as rechargeable batteries and supercapacitors. In traditional electrodes, the binder is usually electrochemically inert and has weak interactions and interfaces between binder and the active material, which increase “dead mass” and directly affect the performance of energy storage system. The binder‐free electrode can provide well‐designed electrode material structure enables well connection between active materials themselves and current collectors. In addition, without insulating binder, electron and electrolyte ions can transfer more efficiently within the electrode materials. Here, we reviewed research efforts in using various techniques involving chemical, physical and electrical methods to fabricate binder‐free electrodes. For every technique, we first briefly describe their principle and involved factors that influence the performance of as‐fabricated binder‐free electrodes and summarize advantages and disadvantages. Next, we reviewed several works which have used this technique to fabricate binder‐free electrodes. Further, the effect of well‐crafted structure design on the properties of energy storage performances including rate capability, and cycle stability was highlighted. Last, we offer our perspectives on the challenges and potential future research directions in this area. We hope this review can stimulate more research to design and synthesize the binder‐free materials for EES devices.

show abstract

Section: Synthesis Of Binder‐free Electrodes and Their Electrochemical Energy Storage Applicationsmentioning

confidence: 99%

Recent Progress in Binder‐Free Electrodes Synthesis for Electrochemical Energy Storage Application

Shen

Zhai

Wang

et al. 2021

Batteries & Supercaps

Self Cite

View full text Add to dashboard Cite

show abstract

“…There are several approaches to assemble nanoscale/macroscale graphene-family materials into macroscopic fibers, including wet-spinning, [48,49] hydrothermal assembly, [50][51][52] and rolling of solid thin films. [53] These methods often start with a well-dispersed liquid suspension of GO.…”

Section: Graphene-family Materialsmentioning

confidence: 99%

“…4f). [51] On the other aspect, CNTs are the most often used conductive materials to increase the electronic conductivity of rGO fibers, the electrical conductivity of rGO/CNT hybrid fibers can reach about 5 to 9 times higher than that of rGO fibers. [55,69] Conducive metal oxides (e.g., RuO 2 ) [50] and conductive polymers [52] have also been used to enhance the electrical conductivity of rGO fibers.…”

Section: Graphene-family Materialsmentioning

confidence: 99%

2D materials for 1D electrochemical energy storage devices

Zhai

Karahan

et al. 2019

Energy Storage Materials

Self Cite

View full text Add to dashboard Cite

“…Nevertheless, conventional doping and atmospheric control techniques involve composite carbon precursors, complex synthetic methods, and long reaction times. [ 41–43 ] Redox nanomaterial decoration of LIG can increase pseudocapacitance and active surface area. [ 44,45 ] Ren et al.…”

Section: Introductionmentioning

confidence: 99%

Dual Defocused Laser Pyrolysis: A Lasing‐Centric Strategy for Defect and Morphological Optimization in Microsupercapacitor Electrodes

Yan

Wang

et al. 2022

Small Methods

View full text Add to dashboard Cite

Laser‐induced graphene (LIG) has shown great potential for controllable and scalable realization of microsupercapacitors (MSCs). However, as is well‐known, LIG electrodes suffer from low charge storage capacity and conductance. In this paper, a lasing‐centric method is presented for defect control and morphological enhancement in LIG electrodes through unique dual laser pyrolysis. This method encompasses dual lasing pyrolysis, one for the synthesis of defocused LIG, and another for the decoration of Ru nanoparticles to enhance electrochemical performance. Fundamentally, the investigation simultaneously optimizes for defocused lasing distance and lasing speed, which to the best of the author's knowledge, has not been previously reported. The defocused LIG electrode exhibits a remarkably improved electrochemical capacitance of over 25 times (114 mF cm−2) compared to the one based on focused laser‐induced graphene (FLIG). As a device demonstration, a flexible and self‐healable MSC has been fabricated based on DFLIG/Ru‐PEDOT/Au electrodes, exhibiting a high areal specific capacitance (25.7 mF cm−2), excellent electrochemical stability (91% retention of specific capacitance after 8000 cycles), and good self‐healing performance (85.6% retention of specific capacitance after two cut‐heal cycles). By enhancing material properties via dual defocused laser pyrolysis, this work presents a strategy for highly controllable and scalable realization of electrodes in micro‐energy storage devices.

show abstract

Ultrafast hydrothermal assembly of nanocarbon microfibers in near-critical water for 3D microsupercapacitors

Cited by 26 publications

References 88 publications

Recent Progress in Binder‐Free Electrodes Synthesis for Electrochemical Energy Storage Application

Recent Progress in Binder‐Free Electrodes Synthesis for Electrochemical Energy Storage Application

2D materials for 1D electrochemical energy storage devices

Dual Defocused Laser Pyrolysis: A Lasing‐Centric Strategy for Defect and Morphological Optimization in Microsupercapacitor Electrodes

Contact Info

Product

Resources

About