Kai Tang

University of Electronic Science and Technology of China

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Xianfu Wang

University of Electronic Science and Technology of China

Chenglin Yan

Changzhou University

Qun Li

Nanjing University of Posts and Telecommunications

Yiming Xie

Huaqiao University

Chao Wang

Soochow University

Mao Liang

Wuhan University

Haoliang Lu

Soochow University

Zhe Sun

Tianjin University of Technology

Song Xue

Tianjin University of Technology

Zeyang Mao

Soochow University

Cooperative Institutions

Soochow University

University of Electronic Science and Technology of China

National Engineering Research Center of Electromagnetic Radiation Control Materials

Chinese Academy of Sciences

Chengdu University

Tianjin University of Technology

University of Chinese Academy of Sciences

University of Science and Technology of China

Central South University

Tianjin University

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Hydrogen Evolution Reaction: High Edge Selectivity of In Situ Electrochemical Pt Deposition on Edge‐Rich Layered WS₂ Nanosheets (Adv. Mater. 7/2018)

Advanced Materials (2018)

Kai Tang Xianfu Wang Qun Li Chenglin Yan

Layered 2H-WS2 nanosheets show high edge selectivity of in situ electrochemical Pt deposition in acidic solution. In article number 1704779, Xianfu Wang, Chenglin Yan, and co-workers theoretically elucidate and experimentally verify the edge selectivity. The terminated S22− or S2− ligands on the edge of the WS2 nanosheets exhibit much lower binding energy with the Pt atom than the apical S2− ligands on the terrace surface.

Deposition

10.1002/adma.201870047

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Citations (8)

Photovoltaic Performance of Triphenylamine Dyes-sensitized Solar Cells Employing Cobalt Redox Shuttle and Influence of π-conjugated Spacers

Chinese Journal of Chemical Physics (2013)

Jiangnan Jia Kai Tang Mao Liang Hongyu Han Quanping Wu

Developing photosensitizers suitable for the cobalt electrolyte and understanding the structure-property relationship of organic dyes is warranted for the dye-sensitized solar cells (DSSCs). The DSSCs incorporating tris(1,10-phenanthroline)cobalt(II/III)-based redox electrolyte and four synthesized organic dyes as photosensitizers are described. The photovoltaic performance of these dyes-sensitized solar cells employing the cobalt redox shuttle and the influences of the π-conjugated spacers of organic dyes upon the photovoltage and photocurrent of mesoscopic titania solar cells are investigated. It is found that organic dyes with thiophene derivates as linkers are suitable for DSSCs employing cobalt electrolytes. DSSCs sensitized with the as-synthesized dyes in combination with the cobalt redox shuttle yield an overall power conversion efficiency of 6.1% under 100 mW/cm2 AM1.5 G illumination.

Triphenylamine

Photocurrent

10.1063/1674-0068/26/03/310-320

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Citations (1)

Aluminum‐Tailored Energy Level and Morphology of Co₃₋_xAl_xO₄ Porous Nanosheets toward Highly Efficient Electrocatalysts for Water Oxidation

Small (2019)

Xianfu Wang Pengfei Sun Haoliang Lu Kai Tang Qun Li

Abstract Tuning energy levels plays a crucial role in developing cost‐effective, earth‐abundant, and highly active oxygen evolution catalysts. However, to date, little attention has been paid to the effect of using heteroatom‐occupied lattice sites on the energy level to engineer electrocatalytic activity. In order to explore heteroatom‐engineered energy levels of spinel Co 3 O 4 for highly‐effective oxygen electrocatalysts, herein Al atoms are directly introduced into the crystal lattice by occupying the Co 2+ ions in the tetrahedral sites and Co 3+ ions in the octahedral sites (denoted as Co 2+ Td and Co 3+ Oh , respectively). Experimental and theoretical simulations demonstrate that Al 3+ ions substituting Co 2+ Td and Co 3+ Oh active sites, especially Al 3+ ions occupying the Co 2+ Td sites, optimizes the adsorption, activation, and desorption features of intermediate species during oxygen evolution reaction (OER) processes. As a result, the optimized Co 1.75 Al 1.25 O 4 nanosheet exhibit unprecedented OER activity with an ultralow overpotential of 248 mV to deliver a current of 10 mA cm –2 , among the best Co‐based OER electrocatalysts. This work should not only provide fundamental understanding of the effect of Al‐occupied different Co sites in Co 3–x Al x O 4 composites on OER performance, but also inspire the design of low‐cost, earth‐abundant, and high‐active electrocatalysts toward water oxidation.

Overpotential

Oxygen evolution

Heteroatom

10.1002/smll.201804886

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Citations (37)

Construction of a urea-assisted electrolytic energy-saving hydrogen production system using catalysts prepared by molybdate

International Journal of Hydrogen Energy (2024)

Kai Tang Shilin Zhang Mei Yang Hongxiu Lu Gang Wang

10.1016/j.ijhydene.2024.07.252

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Citations (0)

Single‐Nanostructured Electrochemical Detection for Intrinsic Mechanism of Energy Storage: Progress and Prospect

Small (2018)

Sidra Anis Farooqi Xianfu Wang Haoliang Lu Qun Li Kai Tang

Abstract Energy storage appliances are active by means of accompanying components for renewable energy resources that play a significant role in the advanced world. To further improve the electrochemical properties of the lithium‐ion batteries (LIBs), sodium‐ion batteries (SIBs), and lithium–sulfur (Li–S) batteries, the electrochemical detection of the intrinsic mechanisms and dynamics of electrodes in batteries is required to guide the rational design of electrodes. Thus, several researches have conducted in situ investigations and real‐time observations of electrode evolution, ion diffusion pathways, and side reactions during battery operation at the nanoscale, which are proven to be extremely insightful. However, the in situ cells are required to be compatible for electrochemical tests and are therefore often challenging to operate. In the past few years, tremendous progresses have been made with novel and more advanced in situ electrochemical detection methods for mechanism studies, especially single‐nanostructured electrodes. Herein, a comprehensive review of in situ techniques based on single‐nanostructured electrodes for studying electrodes changes in LIBs, SIBs, and Li–S batteries, including structure evolution, phase transition, interface formation, and the ion diffusion pathway is provided, which is instructive and meaningful for the optimization of battery systems.

10.1002/smll.201803482

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Citations (5)

Redox Chemistry of Molybdenum Trioxide for Ultrafast Hydrogen‐Ion Storage

Angewandte Chemie (2018)

Xianfu Wang Yiming Xie Kai Tang Chao Wang Chenglin Yan

Abstract Hydrogen ions are ideal charge carriers for rechargeable batteries due to their small ionic radius and wide availability. However, little attention has been paid to hydrogen‐ion storage devices because they generally deliver relatively low Coulombic efficiency as a result of the hydrogen evolution reaction that occurs in an aqueous electrolyte. Herein, we successfully demonstrate that hydrogen ions can be electrochemically stored in an inorganic molybdenum trioxide (MoO 3 ) electrode with high Coulombic efficiency and stability. The as‐obtained electrode exhibits ultrafast hydrogen‐ion storage properties with a specific capacity of 88 mA hg −1 at an ultrahigh rate of 100 C. The redox reaction mechanism of the MoO 3 electrode in the hydrogen‐ion cell was investigated in detail. The results reveal a conversion reaction of the MoO 3 electrode into H 0.88 MoO 3 during the first hydrogen‐ion insertion process and reversible intercalation/deintercalation of hydrogen ions between H 0.88 MoO 3 and H 0.12 MoO 3 during the following cycles. This study reveals new opportunities for the development of high‐power energy storage devices with lightweight elements.

Molybdenum trioxide

Reversible hydrogen electrode

Standard hydrogen electrode

10.1002/ange.201803664

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Citations (27)

DESIGN OF BEAM INTENSITY MEASUREMENT SYSTEM IN INJECTOR FOR HLS II

5th Int. Particle Accelerator Conf. (IPAC'14), Dresden, Germany, June 15-20, 2014 (2014)

Chaocai Cheng Ping Lu Baogen Sun Kai Tang Jun Xu

Intensity

10.18429/jacow-ipac2014-thpme141

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Citations (0)

Rücktitelbild: Redox Chemistry of Molybdenum Trioxide for Ultrafast Hydrogen‐Ion Storage (Angew. Chem. 36/2018)

Angewandte Chemie (2018)

Xianfu Wang Yiming Xie Kai Tang Chao Wang Chenglin Yan

Wasserstoffionen sind ideale Ladungsträger für wiederaufladbare Batterien aufgrund ihres kleinen Ionenradius und der unbegrenzten Verfügbarkeit. In ihrer Zuschrift auf S. 11743 ff. untersuchen C. Yan et al. die Redoxchemie von MoO3 für die ultraschnelle Wasserstoffionenspeicherung mittels Röntgendiffraktometrie, Photoelektronen- und Elektronenenergieverlustspektroskopie im Reflexionsmodus. Die Umwandlungsreaktion für den ersten Wasserstoffionen-Einlagerungsprozess und die Redoxreaktionen während der Lade/Entlade-Zyklen werden identifiziert.

Molybdenum trioxide

10.1002/ange.201806822

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Citations (0)

Electronic and Photoelectronic Memristors Based on 2D Materials

Advanced Electronic Materials (2022)

Kai Tang Yang Wang Chuanhui Gong Chujun Yin Miao Zhang

Abstract Next‐generation memristive devices and neuromorphic computing have many fantastic properties in breaking down the memory walls of conventional von Neumann structures. Electronic and photoelectronic memristors are the most important basic components, equipping with the capability of data storage and information processing for electronic and photoelectronic signals. 2D layered materials exhibit many unique physical advantages such as novel mechanisms, ultrathin channel, high mechanical flexibility, and easy electrical control, and thus demonstrate great potential for memory with high density, fast speed, and low power consumption. In recent years, abundant and fruitful designs have been devoted in terms of 2D memristors. Herein, the recent advances of 2D electronic and photoelectronic memristors are reviewed, as well as the application on simulating artificial brain neural network and visual neural network, respectively. An overview of the challenges and perspectives on the exploitation of 2D materials for memristors is given, and routes to realize practical brain and visual neural network are proposed.

Memristor

Neuromorphic engineering

10.1002/aelm.202101099

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Citations (51)

SnS2 quantum dots growth on MoS2: Atomic-level heterostructure for electrocatalytic hydrogen evolution

Electrochimica Acta (2019)

Tariq Ali Xianfu Wang Kai Tang Qun Li Saman Sajjad

Overpotential

Molybdenum disulfide

10.1016/j.electacta.2019.01.085

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Citations (49)