Dingshan Yu

Sun Yat-sen University

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Xudong Chen

Central South University

Zhongke Yuan

Ji Hua Laboratory

Liming Dai

UNSW Sydney

Meijia Yang

Sun Yat-sen University

Zhengsong Fang

Sun Yat-sen University

Jing Li

Liaoning University of Traditional Chinese Medicine

Linfeng Zhong

Sun Yat-sen University

Long Fang

Qingdao University

Xiaofeng Lin

Sun Yat-sen University

Xuanhe Hu

Guangdong University of Technology

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Sun Yat-sen University

159

Chinese Academy of Sciences

Guangdong University of Technology

University of Chinese Academy of Sciences

Tsinghua University

Sichuan University

Ministry of Education of the People's Republic of China

Shanghai Jiao Tong University

Zhejiang University

South China University of Technology

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Plasmonic effects and the morphology changes on the active material P3HT:PCBM used in polymer solar cells using Raman spectroscopy

Journal of Raman Spectroscopy (2016)

Yuzhao Yang Lu Sun Jiemei Ou Yiting He Xiaofeng Lin

There is no consensus yet that the enhancement effects of plasmonic device are predominantly caused by plasmonic effects or induced morphology changes in the optoelectronic `materials. Herein, we present a detailed Raman characterization of a typical organic P3HT:PCBM system comprising silver nanowires (Ag NWs) with different size, which can simultaneously study the plasmonic effects and the morphology changes. The direct comparison of the Raman spectra of non‐annealed and annealed samples indicates that the morphology of plasmonic samples has changed before annealing and the morphology of plasmonic samples and reference sample after annealing is not distinguishable. This indicates that the interaction between P3HT and Ag NWs with different size can be explained by plasmonic effects after annealing. Moreover, in‐situ Raman spectroscopy is used to study the morphology changes in plasmonic samples with different diameters of Ag NWs during heating process. This method can distinguish the plasmonic effects and morphology changes of plasmonic device. Copyright © 2016 John Wiley & Sons, Ltd.

Morphology

10.1002/jrs.4917

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Citations (10)

Ternary Hybrids of Amorphous Nickel Hydroxide–Carbon Nanotube‐Conducting Polymer for Supercapacitors with High Energy Density, Excellent Rate Capability, and Long Cycle Life

Advanced Functional Materials (2015)

Wenchao Jiang Dingshan Yu Qiang Zhang Kunli Goh Wei Li

The utilization of Ni(OH) 2 as a pseudocapacitive material for high performance supercapacitors is hindered by its low electrical conductivity and short cycle life. A coaxial ternary hybrid material comprising of amorphous Ni(OH) 2 deposited on multiwalled carbon nanotubes wrapped with conductive polymer (poly (3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate)) is demonstrated. A thin layer of disordered amorphous Ni(OH) 2 is deposited by an effective “coordinating etching and precipitating” method, resulting in an ultrahigh specific capacitance of 3262 F g −1 at 5 mV s −1 and excellent rate capability (71.9% capacitance retention at 100 mV s −1 ). More importantly, the polymer layer prevents the degradation of the nanostructure and dissolution of Ni ion during repeated charge–discharge cycling for 30 000 cycles, a phenomenon which often plagues Ni(OH) 2 nanomaterials. Using the ternary Ni(OH) 2 hybrid and the reduced graphene oxide/carbon nanotube hybrid as the positive and negative electrodes, respectively, the assembled asymmetric supercapacitors exhibit high energy density of 58.5 W h kg −1 at the power density of 780 W kg −1 as well as long cycle life (86% capacitance retention after 30 000 cycles). The ternary hybrid architecture design for amorphous Ni(OH) 2 can be regarded as a general approach to obtain pseudocapacitive materials for supercapacitors with both high energy density, excellent rate capability, and long cycle life.

Power density

10.1002/adfm.201403354

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Citations (299)

One-Pot Large-Scale Synthesis of Carbon Quantum Dots: Efficient Cathode Interlayers for Polymer Solar Cells

ACS Applied Materials & Interfaces (2017)

Yuzhao Yang Xiaofeng Lin Wenlang Li Jiemei Ou Zhongke Yuan

Cathode interlayers (CILs) with low-cost, low-toxicity, and excellent cathode modification ability are necessary for the large-scale industrialization of polymer solar cells (PSCs). In this contribution, we demonstrated one-pot synthesized carbon quantum dots (C-dots) with high production to serve as efficient CIL for inverted PSCs. The C-dots were synthesized by a facile, economical microwave pyrolysis in a household microwave oven within 7 min. Ultraviolet photoelectron spectroscopy (UPS) studies showed that the C-dots possessed the ability to form a dipole at the interface, resulting in the decrease of the work function (WF) of cathode. External quantum efficiency (EQE) measurements and 2D excitation-emission topographical maps revealed that the C-dots down-shifted the high energy near-ultraviolet light to low energy visible light to generate more photocurrent. Remarkably improvement of power conversion efficiency (PCE) was attained by incorporation of C-dots as CIL. The PCE was boosted up from 4.14% to 8.13% with C-dots as CIL, which is one of the best efficiency for i-PSCs used carbon based materials as interlayers. These results demonstrated that C-dots can be a potential candidate for future low cost and large area PSCs producing.

Photocurrent

Ultraviolet

Ultraviolet photoelectron spectroscopy

Carbon fibers

10.1021/acsami.7b00282

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Citations (41)

Flexible Solid‐State Metal‐Air Batteries: The Booming of Portable Energy Supplies

ChemSusChem (2022)

Ning Liu Zhanhao Liang Fan Yang Xiaotong Wang Junjie Zhong

The rapid development of portable and wearable electronics has given rise to new challenges and provoked research in flexible, lightweight, and affordable energy storage devices. Flexible solid-state metal-air batteries (FSSMABs) are considered promising candidates, owing to their large energy density, mechanical flexibility, and durability. However, the practical applications of FSSMABs require further improvement to meet the demands of long-term stability, high power density, and large operating voltage. This Review presents a detailed discussion of innovative electrocatalysts for the air cathode, followed by a sequential overview of high-performance solid-state electrolytes and metal anodes, and a summary of the current challenges and future perspectives of FSSMABs to promote practical application and large-scale commercialization in the near future.

Energy density

10.1002/cssc.202202192

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Citations (7)

Deformation and Stress Response of Carbon Nanotubes/UHMWPE Composites under Extensional-Shear Coupling Flow

Applied Composite Materials (2017)

Junxia Wang Changlin Cao Dingshan Yu Xudong Chen

Breakage

10.1007/s10443-017-9606-8

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Unique Octupolar 2D‐Polymer Frameworks as Mixed Conductors and Metal‐Free Catalysts for Dual‐Promoted Li and S Electrochemistry: Multi‐regulation Role of Ethoxylation Chemistry

Angewandte Chemie International Edition (2023)

Cong Liu Chunshao Mo Linfeng Zhong Xiaoqi Gong Yang Zhang

Here, we for the first time introduce ethoxylation chemistry to develop a new octupolar cyano-vinylene-linked 2D polymer framework (Cyano-OCF-EO) capable of acting as efficient mixed electron/ion conductors and metal-free sulfur evolution catalysts for dual-promoted Li and S electrochemistry. Our strategy creates a unique interconnected network of strongly-coupled donor 3-(acceptor-core) octupoles in Cyano-OCF-EO, affording enhanced intramolecular charge transfer, substantial active sites and crowded open channels. This enables Cyano-OCF-EO as a new versatile separator modifier, which endows the modified separator with superior catalytic activity for sulfur conversion and rapid Li ion conduction with the high Li+ transference number up to 0.94. Thus, the incorporation of Cyano-OCF-EO can concurrently regulate sulfur redox reactions and Li-ion flux in Li-S cells, attaining boosted bidirectional redox kinetics, inhibited polysulfide shuttle and dendrite-free Li anodes. The Cyano-OCF-EO-involved Li-S cell is endowed with excellent overall electrochemical performance especially large areal capacity of 7.5 mAh cm-2 at high sulfur loading of 8.7 mg cm-2 . Mechanistic studies unveil the dominant multi-promoting effect of the triethoxylation on electron and ion conduction, polysulfide adsorption and catalytic conversion as well as previously-unexplored -CN/C-O dual-site synergistic effect for enhanced polysulfide adsorption and reduced energy barrier toward Li2 S conversion.

Polysulfide

Separator (oil production)

10.1002/anie.202312016

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Metal Organic Frameworks as Polysulfide Reaction Modulators for Lithium Sulfur Batteries: Advances and Perspectives

ChemPhysChem (2024)

Xuliang Fan You Zhang Ruosi Peng Zheng Liang Xunfu Zhou

Currently, lithium sulfur (Li-S) battery with high theoretical energy density has attracted great research interest. However, the diffusion and loss process of intermediate lithium polysulfide during charge-discharge hindered the application of the Li-S battery in modern life. To overcome this issue, metal organic frameworks (MOFs) and their composites have been regarded as effective additions to restrain the LiPS diffusion process for Li-S battery. Benefiting from the unique structure with rich active sites to adsorb LiPS and accelerate the LiPS redox, the Li-S batteries with MOFs modified exhibit superior electrochemical performance. Considering the rapid development of MOFs in Li-S battery, this review summarizes the recent studies of MOFs and their composites as the sulfur host materials, functional interlayer, separator coating layer, and separator/solid electrolyte for Li-S batteries in detail. In addition, the promising design strategies of functional MOF materials are proposed to improve the electrochemical performance of Li-S battery.

Polysulfide

Separator (oil production)

Lithium–sulfur battery

Organic radical battery

Lithium battery

10.1002/cphc.202400239

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Citations (4)

Sensitive phase separation behavior of ultra-high molecular weight polyethylene in polybutene

Polymer Testing (2019)

Changlin Cao Wei Jiang Yu Lin Xiaochuan Chen Qingrong Qian

Ultra-high-molecular-weight polyethylene

Miscibility

Polybutene

Diluent

10.1016/j.polymertesting.2019.106243

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Citations (12)

Structural and lasing characteristics of ultrathin hexagonal ZnO nanodisks grown vertically on silicon-on-insulator substrates

Applied Physics Letters (2007)

Dingshan Yu Yujie Chen Baojun Li Xudong Chen Mingqiu Zhang

Hexagonal ZnO nanodisks were grown on silicon-on-insulator substrates by vapor-transport method without catalysts. The resulting nanodisks possess ultrathin thickness (10–20nm) and most of them present vertical orientation on the substrate surface. Under optical excitation, these ultrathin nanodisks exhibit ultraviolet lasing emission with the excitation threshold of 205μJ∕cm2 and emission lifetime of 2ps at room temperature. The detailed lasing analysis indicates that whispering-gallery-mode lasing may occur in the ZnO nanodisks.

Ultraviolet

Wide-bandgap semiconductor

10.1063/1.2779094

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Citations (41)

Capturing Visible Light in Low‐Band‐Gap C₄N‐Derived Responsive Bifunctional Air Electrodes for Solar Energy Conversion and Storage

Angewandte Chemie (2021)

Zhengsong Fang Yuan Li Jing Li Chenhao Shu Linfeng Zhong

Abstract We report facile synthesis of low‐band‐gap mesoporous C 4 N particles and their use as responsive bifunctional oxygen catalysts for visible‐light‐sensitive (VLS) rechargeable Zn‐air battery (RZAB) and polymer‐air battery (RPAB). Compared to widely studied g‐C 3 N 4 , C 4 N shows a smaller band gap of 1.99 eV, with a larger photocurrent response, and it can function as visible‐light‐harvesting antenna and bifunctional oxygen reduction/evolution (ORR/OER) catalysts, enabling effective photocoupling to tune oxygen catalysis. The C 4 N‐enabled VLS‐RZAB displays a low charge voltage of 1.35 V under visible light, which is below the theoretical RZAB voltage of 1.65 V, corresponding to a high energy efficiency of 97.78 %. Pairing a C 4 N cathode with a polymer anode also endows an VLS‐RPAB with light‐boosted charge performance. It is revealed that the ORR and OER active sites in C 4 N are separate carbon sites near pyrazine‐nitrogen atoms and photogenerated energetic holes can activate OER for improved reaction kinetics.

Photocurrent

Oxygen evolution

Visible spectrum

10.1002/ange.202104790

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Citations (19)