Tianyu Gai

Collaborative Innovation Center of Chemistry for Energy Materials

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Yajie Li

Beijing University of Chemical Technology

Yuejin Lin

South China Agricultural University

Yanquan Duan

Zhengzhou University

Baojun Li

Zhengzhou University

Kai Li

Wuhan University of Technology

Wenjing Zhang

Yantai Institute of Coastal Zone Research

Jinpeng Li

Zhengzhou University

Yan Liu

Shanghai Jiao Tong University

Jie Ding

Hankou University

Wenjing Zhang

Zhejiang University of Technology

Cooperative Institutions

Fudan University

Collaborative Innovation Center of Chemistry for Energy Materials

Zhengzhou University

University of Illinois Urbana-Champaign

Purdue University West Lafayette

Sichuan University

Huazhong University of Science and Technology

University of Illinois System

Batman University

Chinese Academy of Sciences

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CCDC 1890284: Experimental Crystal Structure Determination

The Cambridge Structural Database (2019)

Yajie Li Tianyu Gai Yuejin Lin Wenjing Zhang Kai Li

10.5517/ccdc.csd.cc21fzxd

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CCDC 1890280: Experimental Crystal Structure Determination

The Cambridge Structural Database (2019)

Yajie Li Tianyu Gai Yuejin Lin Wenjing Zhang Kai Li

10.5517/ccdc.csd.cc21fzs8

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CCDC 1890281: Experimental Crystal Structure Determination

The Cambridge Structural Database (2019)

Yajie Li Tianyu Gai Yuejin Lin Wenjing Zhang Kai Li

10.5517/ccdc.csd.cc21fzt9

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Frontal Polymerization of Thin Layers on a Thermally Insulating Substrate

ACS Applied Polymer Materials (2022)

Yuan Gao Luis E. Rodriguez Koett Julie Hemmer Tianyu Gai Nil A. Parikh

Motivated by the use of frontal polymerization for the manufacturing of thin layers with thickness down to ∼100 μm, we numerically and experimentally investigate the interplay between the exothermic polymerization and the heat losses to the substrate. The results show how the reaction–diffusion power balance affects the velocity and temperature of the polymerization front. The lower thickness limit of the thin layer depends on the cure kinetics of the resin and the thermal properties of the substrate and is described by a scaling law. Concurrently, thin-layer frontal polymerization experiments confirm the effects of front–substrate interaction on the front propagation and the limiting thickness of the polymerized layer. The present study offers a fundamental understanding of the resin–substrate interplay in thin-layer frontal polymerization and provides a quantitative description of the limiting thickness of the layer in the fabrication of functional thin polymeric parts and resin coatings.

Front velocity

Exothermic reaction

10.1021/acsapm.2c00497

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CCDC 744455: Experimental Crystal Structure Determination

The Cambridge Structural Database (2009)

D.-C. Wang Jinrong Bai Wenqing Xu Tianyu Gai H.-Q. Liu

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccsznp2

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Impact of Boundary Heat Losses on Frontal Polymerization

The Journal of Physical Chemistry B (2020)

Elyas Goli Tianyu Gai Philippe H. Geubelle

Considered as a faster and energy-efficient alternative to conventional manufacturing techniques for thermosetting polymers and composites, frontal polymerization (FP) is built on a thermal equilibrium between the heat generated by the exothermic reaction of the resin system and the heat consumed by the advancing front. However, a heat loss to the surrounding may disrupt this thermal equilibrium and slow down and possibly quench the front. This paper investigates the impact of two types of heat loss to the surrounding on the key characteristics (propagation speed and maximum temperature) of the polymerization front: convective heat loss along the boundary of the reaction channel and contact heat loss at channel-tool plate interfaces. The analysis is performed numerically using a nonlinear, adaptive fully coupled finite element solver.

Exothermic reaction

Thermosetting polymer

10.1021/acs.jpcb.0c03107

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Citations (30)

CCDC 1890278: Experimental Crystal Structure Determination

The Cambridge Structural Database (2019)

Yajie Li Tianyu Gai Yuejin Lin Wenjing Zhang Kai Li

10.5517/ccdc.csd.cc21fzq6

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Background suppression for CARS thermometry in highly luminous flames using an electro-optical shutter

Optics Letters (2023)

William C. B. Senior Rohan Gejji Tianyu Gai Carson D. Slabaugh Robert P. Lucht

An electro-optical shutter (EOS), comprising a Pockels cell located between crossed-axis polarizers, is integrated into a nanosecond coherent anti-Stokes Raman scattering (CARS) system. The use of the EOS enables thermometry measurements in high-luminosity flames through significant reduction of the background resulting from broadband flame emission. A temporal gating ≤100 ns along with an extinction ratio >10,000:1 are achieved using the EOS. Integration of the EOS enables the use of an unintensified CCD camera for signal detection, improving upon the signal-to-noise ratio achievable with inherently noisy microchannel plate intensification processes previously employed for short temporal gating. The reduction in background luminescence afforded by the EOS in these measurements allows the camera sensor to capture CARS spectra at a broad range of signal intensities and corresponding temperatures, without saturation of the sensor, thus enhancing the dynamic range of these measurements.

Polarizer

10.1364/ol.487082

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CCDC 1890282: Experimental Crystal Structure Determination

The Cambridge Structural Database (2019)

Yajie Li Tianyu Gai Yuejin Lin Wenjing Zhang Kai Li

10.5517/ccdc.csd.cc21fzvb

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Biomimetic Superstructured Interphase for Aqueous Zinc-Ion Batteries

Journal of the American Chemical Society (2024)

Yan Ai Chaochao Yang Ziqing Yin Tong Wang Tianyu Gai

The practical application of aqueous zinc-ion batteries (AZIBs) is greatly challenged by rampant dendrites and pestilent side reactions resulting from an unstable Zn–electrolyte interphase. Herein, we report the construction of a reliable superstructured solid electrolyte interphase for stable Zn anodes by using mesoporous polydopamine (2D-mPDA) platelets as building blocks. The interphase shows a biomimetic nacre's "brick-and-mortar" structure and artificial transmembrane channels of hexagonally ordered mesopores in the plane, overcoming the mechanical robustness and ionic conductivity trade-off. Experimental results and simulations reveal that the −OH and −NH groups on the surface of artificial ion channels can promote rapid desolvation kinetics and serve as an ion sieve to homogenize the Zn2+ flux, thus inhibiting side reactions and ensuring uniform Zn deposition without dendrites. The 2D-mPDA@Zn electrode achieves an ultralow nucleation potential of 35 mV and maintains a Coulombic efficiency of 99.8% over 1500 cycles at 5 mA cm–2. Moreover, the symmetric battery exhibits a prolonged lifespan of over 580 h at a high current density of 20 mA cm–2. This biomimetic superstructured interphase also demonstrates the high feasibility in Zn//VO2 full cells and paves a new route for rechargeable aqueous metal-ion batteries.

Interphase

10.1021/jacs.4c03943

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Citations (27)