Yapeng Cheng

Wuhan University of Technology

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Haining Zhang

Wuhan University of Technology

Meiling Fan

Wuhan University of Technology

Haolin Tang

Wuhan University of Technology

Andreu Cabot

Institut de Recerca en Energia de Catalunya

Shichang Cai

Henan University of Technology

Zihan Meng

Ji Hua Laboratory

Jordi Arbiol

Institut Català de Nanociència i Nanotecnologia

Erjun Kan

Nanjing University of Science and Technology

Xuede Qi

Institut de Recerca en Energia de Catalunya

Canhuang Li

Institut de Recerca en Energia de Catalunya

Cooperative Institutions

Chinese Academy of Sciences

Wuhan University of Technology

Institut de Recerca en Energia de Catalunya

Peking University

Universitat de Barcelona

University of Science and Technology of China

Henan University of Technology

Chemnitz University of Technology

University of Chinese Academy of Sciences

Ji Hua Laboratory

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Atomized Copper-Decorated Nitrogen-Doped Porous Carbon Fibers as a Self-Standing Air Cathode for Flexible Zinc–Air Batteries

ACS Sustainable Chemistry & Engineering (2022)

Meiling Fan Yapeng Cheng Xin Peng Haining Zhang Jinsong Wu

Development of self-standing electrodes is highly desirable for flexible electrochemical energy storage and conversion devices. Herein, we report the facile synthesis of atomized copper-decorated nitrogen-doped porous carbon nanofibers by pyrolyzing g-C3N4-modified electrospun polyacrylonitrile (PAN) fibers directly from copper paper. The concurrent PAN fiber pyrolysis and copper paper atomization allow for diffusion of Cu atoms into the nitrogen-doped carbon framework. The as-prepared atomized copper-decorated nitrogen-doped porous carbon nanofibers possess a high surface area of 604.5 m2 g–1 and a pore volume of 1.70 cm3 g–1, with Cu atomically dispersed inside the N-doped carbon framework in the form of Cu–N4 active sites. The Cu incorporation leads to a positive shift of the half-wave potential in oxygen reduction reactions by 84 mV in an alkaline electrolyte. The open-circuit voltage (OCV) of the self-assembled flexible zinc–air battery reaches 1.37 V using the synthesized nanofiber membrane as self-standing cathode and decreases slightly with the increase in bending angles. The as-prepared material is also applied in a liquid zinc–air battery, delivering a power density of 100 mW cm–2 at a current density of 150 mA cm–2 with a remaining voltage above 1.0 V after discharging at 10 mA cm–2 for 292 h.

Polyacrylonitrile

Carbon fibers

Electrospinning

10.1021/acssuschemeng.2c01560

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Citations (10)

N, S-Codoped Porous Carbon with Densely Edge Structure for Oxygen Reduction Reaction and Zinc-Air Battery

ACS Applied Energy Materials (2024)

Zhen Yuan Meiling Fan Yadong Wang Yapeng Cheng Haining Zhang

The sp2-hybridized electronic structure of pristine carbon results in poor kinetic processes in the oxygen reduction reaction (ORR) with a high energy barrier for the proton-coupled electron transfer process. Thus, designing numerous accessible defects by breaking the symmetric structure of carbon materials is conducive to reduce the energy barrier of the ORR. Meanwhile, the heteroatom doping strategy can also modify the electronic properties of neighboring carbon atoms to effectively activate the sp2-hybridized electronic structure of carbon nanomaterials. In this work, a defective carbon nanomaterial with densely accessible S, N-codoped edge structures is synthesized via the sacrificial template method. The as-prepared catalyst (S–N–C-3) shows a high external surface area of 518.5 m2g–1 with an abundant edge structure. Meanwhile, the metal-free S–N–C-3 material shows an excellent half-wave potential (0.867 V) in alkaline solution. In addition, the discharge voltage of the assembled zinc–air battery from S–N–C-3 remains 1.24 V after 270 h of continuous operation, suggesting its superior durability. The excellent catalytic properties originate from the densely accessible N, S-codoped edge structure. The work would provide ideas for the design and synthesis of metal-free carbon-based electrocatalysts and the mechanism analysis of ORR.

Carbon fibers

Heteroatom

Nanomaterials

10.1021/acsaem.3c03023

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Citations (4)

A general method to fabricate MoO₃/C composites and porous C for asymmetric solid-state supercapacitors

RSC Advances (2019)

Yu Jiang Xuemin Yan Yapeng Cheng Yan Zhang Wei Xiao

MoO3 is one of the most promising electrodes for high energy density supercapacitors due to its layered structure, which facilitates the insertion/removal of small ions. However, the commercial recognition of MoO3-based electrodes has been hampered by their low electronic conductivity, poor structural stability and narrow working potential window. A MoO3/C composite (MCs) has been synthesized by a polymerization method followed by calcination of the obtained hydrogel. The obtained MCs electrode exhibits remarkable electrochemical performance in both aqueous (432.5 F g-1 at a current density of 0.5 A g-1, 100% capacity retention after 10 000 cycles) and all-solid (220.5 F g-1 at 0.5 A g-1) systems with porous C as the positive electrode, demonstrating its potential in commercial utilization.

10.1039/c8ra10232e

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Citations (11)

Fe-N4/Co-N4 active sites engineered porous carbon with encapsulated FeCo alloy as an efficient bifunctional catalyst for rechargeable zinc-air battery

Journal of Alloys and Compounds (2022)

Meiling Fan Peipei Liu Yapeng Cheng Haolin Tang Bing Jin

Carbon fibers

Oxygen evolution

10.1016/j.jallcom.2022.168107

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Citations (10)

Self-Templating Synthesis of Hollow Co₃O₄ Nanoparticles Embedded in N,S-Dual-Doped Reduced Graphene Oxide for Lithium Ion Batteries

ACS Nano (2020)

Junke Zhu Wenmao Tu Hongfei Pan Heng Zhang Bin Liu

The design and synthesis of hollow-nanostructured transition metal oxide-based anodes is of great importance for long-term operation of lithium ion batteries. Herein, we report a two-step calcination strategy to fabricate hollow Co3O4 nanoparticles embedded in a N,S-co-doped reduced graphene oxide framework. In the first step, core-shell-like Co@Co3O4 embedded in N,S-co-doped reduced graphene oxide is synthesized by pyrolysis of a Co-based metal organic framework/graphene oxide precursor in an inert atmosphere at 800 °C. The designed hollow Co3O4 nanoparticles with an average particle size of 25 nm and wall thickness of about 4-5 nm are formed by a further calcination process in air at 250 °C via the nanoscale Kirkendall effect. Both micropores and mesopores are generated in the HoCo3O4/NS-RGO framework. Benefiting from the hierarchical porous structure of the hollow Co3O4 and the co-doping of nitrogen and sulfur atoms in reduced graphene oxide, the thus-assembled battery exhibits a high specific capacity of 1590 mAh g-1 after 600 charge-discharge cycles at 1 A g-1 and a promising rate performance from 0.2 to 10 A g-1.

Kirkendall Effect

10.1021/acsnano.0c00712

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Citations (200)

P‐13.3: Crease Improvement Method for Foldable OLED Module by Preloading Mechanism

SID Symposium Digest of Technical Papers (2023)

Jiajun Jiang Yali Liu Wenqiang Wang Yapeng Cheng Yongzhen Jia

Folding OLED has promoted new forms of display applications to the consumer market, but the existing folding display generally have serious crease problems, harming consumers' experience and purchase intention. This work proposes a new method to alleviate screen crease based on the preloading mechanism. The results show that the reflective appearance of the panel equipped with a preloading mechanism is obviously improved, and the deformation of the folding area is reduced by more than 50%, which proves the effective crease improvement.

Folding (DSP implementation)

10.1002/sdtp.16453

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Platinum nanoparticles on defect-rich nitrogen-doped hollow carbon as an efficient electrocatalyst for hydrogen evolution reactions

RSC Advances (2020)

Yapeng Cheng Meiling Fan Weiran Lin Zhiwei Zhang Haining Zhang

Design and synthesis of efficient electrocatalysts with low usage of precious metal and of high stability are essential for hydrogen evolution reaction in their practical applications.

Overpotential

Platinum nanoparticles

Carbon fibers

10.1039/c9ra09662k

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Citations (13)

Fabrication of nitrogen-doped hollow carbon nanospheres with variable nitrogen contents using mixed polymer brushes as precursors

Journal of Materials Science (2019)

Meiling Fan Yapeng Cheng Wenmao Tu Haining Zhang

Heteroatom

Carbon fibers

10.1007/s10853-019-03320-2

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Citations (6)

Tungsten Phosphide on Nitrogen and Phosphorus-Doped Carbon as a Functional Membrane Coating Enabling Robust Lithium-Sulfur Batteries

Canhuang Li Jing Yu Chaoqi Zhang Jian Wang Dawei Yang

Lithium-sulfur batteries (LSBs) hold great potential as future energy storage technology, but their widespread application is hampered by the slow polysulfide conversion kinetics and the sulfur loss during cycling. In this study, we detail a one-step approach to growing tungsten phosphide (WP) nanoparticles on the surface of nitrogen and phosphorus co-doped carbon nanosheets (WP@NPC). We further demonstrate that this material provides outstanding performance as a multifunctional separator in LSBs, enabling higher sulfur utilization and exceptional rate performance. These excellent properties are associated with the abundance of lithium polysulfide (LiPS) adsorption and catalytic conversion sites and rapid ion transport capabilities. Experimental data and density functional theory calculations demonstrate tungsten to have a sulfophilic character while nitrogen and phosphorus provide lithiophilic sites that prevent the loss of LiPSs. Furthermore, WP regulates the LiPS catalytic conversion, accelerating the Li-S redox kinetics. As a result, LSBs containing a polypropylene separator coated with a WP@NPC layer show capacities close to 1500 mAh g-1 at 0.1C and coulombic efficiencies above 99.5% at 3C. Batteries with high sulfur loading, 4.9 mg cm−2, are further produced to validate their superior cycling stability. This work demonstrates the use of multifunctional separators as an effective strategy to promote LSB performance.

Phosphide

Carbon fibers

10.2139/ssrn.4721167

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One-step synthesis of heterostructured cobalt-iron selenide as bifunctional catalyst for overall water splitting

Materials Chemistry and Physics (2021)

Felix Ofori Boakye Yong Li Kwadwo Asare Owusu Ibrahim Saana Amiinu Yapeng Cheng

Overpotential

Selenide

Oxygen evolution

Alkaline water electrolysis

Electrolysis of water

10.1016/j.matchemphys.2021.125201

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Citations (34)