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2 results on '"Yigui Xie"'

1. A Flexible Circularly Polarized Luminescence Switching Device Based on Proton‐Coupled Electron Transfer

Author

Guojian Yang, Zhiqiang Yao, Xuefeng Yang, Yigui Xie, Pengfei Duan, Yu‐Mo Zhang, and Sean Xiao‐An Zhang

Subjects
bistability, circularly polarized luminescences, electrically switchable devices, flexible devices, Science
Abstract

Abstract Flexible circularly polarized luminescence (CPL) switching devices have been long‐awaited due to their promising potential application in wearable optoelectronic devices. However, on account of the few materials and complicated design of manufacturing systems, how to fabricate a flexible electric‐field‐driven CPL‐switching device is still a serious challenge. Herein, a flexible device with multiple optical switching properties (CPL, circular dichroism (CD), fluorescence, color) is designed and prepared efficiently based on proton‐coupled electron transfer (PCET) mechanism by optimizing the chiral structure of switching molecule. More importantly, this device can maintain the switching performance even after 300 bending‐unbending cycles. It has a remarkable comprehensive performance containing bistable property, low open voltage, and good cycling stability. Then, prototype devices with designed patterns have been fabricated, which opens a new application pattern of CPL‐switching materials.

Published
2022
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2. Effects of structural feature of biomass raw materials on carbon products as matrix in cathode of Li-S battery and its electrochemical performance

Author

Yinglin Yan, Caiyin You, Yunhua Xu, Ye Cao, Rong Yang, Jiaming Lin, Yigui Xie, Yiming Zou, Yanyun Yang, and Chaojiang Fan

Subjects
Battery (electricity), Materials science, General Chemical Engineering, General Engineering, General Physics and Astronomy, Biomass, chemistry.chemical_element, 02 engineering and technology, Raw material, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, Microstructure, 01 natural sciences, Cathode, 0104 chemical sciences, law.invention, Chemical engineering, chemistry, law, Specific surface area, General Materials Science, 0210 nano-technology, Carbon
Abstract

In this study, three types of biomass with different structures were selected to synthesize carbon matrix in a cathode of Li-S battery. The influence of the structure of raw biomass on microstructure, sulfur-loading amount, and electrochemical performance was investigated in detail. The results demonstrated that the catkin-derived porous carbon (CPC) inherited the 1D-structured morphology and exhibited the highest specific surface area (2033.09 m2/g), the largest sulfur loading (53.72%), and the highest initial discharge specific capacity (1369.52 mA h g−1) under 0.1 C. Comparatively speaking, the wrinkled cloth-like sakura petal–derived porous carbon showed a better capacity (1218.14 mA h g−1) but poor cycling performance. And the 3D network structure of bamboo-derived porous carbon (BPC) exhibited a relatively high capacity retention. These results demonstrated that the structural feature of biomass raw materials plays an important role in the microstructure and electrochemical performance of the carbon products.

Published
2020
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