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Carbon-based interface engineering and architecture design for high-performance lithium metal anodes

Carbon Energy 2024年第1期6卷 207-235页

作者： Na Zhu Yuxiang Yang Yu Li Ying Bai Junfeng Rong Chuan Wu SINOPEC Research Institute of Petroleum Processing Co. Ltd.BeijingChina Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijingChina Yangtze Delta Region Academy of Beijing Institute of Technology JiaxingChina

Metallic lithium(Li)is considered the“Holy Grail”anode material for the nextgeneration of Li batteries with high energy density owing to the extraordinary theoretical specific capacity and the lowest negative electrochemical potential.However,owing to inhomogeneous Li-ion flux,Li anodes undergo uncontrollable Li deposition,leading to limited power output and practical applications.Carbon materials and their composites with controllable structures and properties have received extensive attention to guide the homogeneous growth of Li to achieve high-performance Li anodes.In this review,the correlation between the behavior of Li anode and the properties of carbon materials is proposed.Subsequently,we review emerging strategies for rationally designing high-performance Li anodes with carbon materials,including interface engineering(stabilizing solid electrolyte interphase layer and other functionalized interfacial layer)and architecture design of host carbon(constructing three-dimension structure,preparing hollow structure,introducing lithiophilic sites,optimizing geometric effects,and compositing with Li).Based on the insights,some prospects on critical challenges and possible future research directions in this field are concluded.It is anticipated that further innovative works on the fundamental chemistry and theoretical research of Li anodes are needed.

关键词： carbon materials dendrites hosts interfacial layers Li metal anodes

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Graphene-based materials for polymer solar cells

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Chinese Chemical Letters 2016年第8期27卷 1259-1270,1468页

作者： Xiao-Feng Lin Zi-Yan Zhang Zhong-Ke Yuan Jing Li Xiao-Fen Xiao Wei Hong Xu-Dong Chen Ding-Shan Yu Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education of China School of Chemistry and Chemical EngineeringSun Yat-sen University Key Laboratory of High Performance Polymer-based Composites of Guangdong Province School of Chemistry and Chemical Engineering Sun Yat-sen University

Due to the remarkable electronic,optical,thermal,and mechanical properties,graphene-based materials have shown great potential in a wide range of technique applications.Particularly,the high transparency,conductivity,flexibility,and abundance make graphene materials highly attractive for polymer solar cells（PSCs）.Graphene-based materials have been regarded as one promising candidate used in various parts in PSCs not only as electrodes,but also as interfacial layers and active layers with an aim to boost the power conversion efficiency of the devices.In this review,we summarize the recent progress about the design and synthesis of graphene-based materials for efficient PSCs along with the related challenges and future perspectives.

关键词： Graphene Polymer solar cells Electrodes interfacial layers Active layers

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Synthesis, Growing Processes and Physical Properties of CdS Nanoclusters in Y-Zeolite Studied by Positron Annihilation

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Wuhan University Journal of Natural Sciences 2000年第4期5卷 431-435页

作者： Peng Hao,Ma Li, Wang Shao-jie, Liu Shu-man, Lin Zhao- jun Department of Physics, Wuhan University, Wuhan 430072, China Institute of Semiconductor, Chinese Academy of Science, Beijing 100086, China Department of Physics Wuhan University Wuhan China Institute of Semiconductor Chinese Academy of Science Beijing China

Direct synthesis of CdS nanoclusters within the pore structure of Y zeolite was made. The location of CdS nanoclusters inside Y zeolite hosts was confirmed by the blue-shifted reflection absorption spectra with respected to that of bulk CdS materials. In this paper, we conducted Positron Annihilation Lifetime Spectrum (PALS) measurements on a series of CdS/Y zeolite samples and concluded that CdS clusters were not located in supercages but in smaller sodalite cages; as the CdS loading concentration increases to 5 wt%, the discrete CdS cubes begin to form bigger superclusters through interaction. The stability of CdS clusters inside the sodalite units is due to the coordination of Cd atoms with the framework oxygen atoms of the double six-ring windows. Moreover, PALS reveals some important information of surface states existing on the interfacial layers between CdS clusters and Y zeolite.

关键词： Y zeolite nanoclusters absorption spectrum positron annihilation surface states interfacial layers

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