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作 者:Mingjun Pang Zhaoyang Song Miaomiao Mao Shang Jiang Ruxia Zhang Runwei Wang Jianguo Zhao
机构地区:[1]Engineering Research Center of Coal-based Ecological Carbon Sequestration Technology of the Ministry of Education,Shanxi Datong University,Datong 037009,China [2]State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,China
出 处:《Frontiers of Materials Science》2024年第2期101-115,共15页材料学前沿(英文版)
基 金:support from the National Natural Science Foundation of China(52071192);the Basic Research Project Fund of Shanxi Province(20210302124491 and 20210302123341);the Key Research and Development Project of Datong(2023003);the Basic Research Project Fund of Shanxi Datong University(2022K10 and 2022K11);the Graduate Education Reform project of Shanxi Datong University(21JG25);the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(2021L370);the Graduate Student Education Innovation Project of Shanxi Datong University(23CX25,22CX11,and 22CX20);the Doctoral Research Fund of Shanxi Datong University(2016-B-14,2016-B-20,and 2019-B-11).
摘 要:In situ carbon-coated Co_(3)Se_(4)/CoSe_(2)(Co_(x)Se_(y))nanoparticles(NPs)attached on three-dimensional(3D)reduced graphene oxide(rGO)sheets were skillfully developed in this work,which involved the environment-friendly hydrothermal method,freeze drying,and selenide calcination.Within the structure,the glucose-derived carbon layer exhibited significantly homogeneous dispersion under an argon environment.This structure not only has enhanced stability,but also can effectively mitigate the volume swell of Co_(x)Se_(y) particles.The resulted Co_(3)Sea/CoSe_(2)@C/rGO(CSe@C/rGO)exhibited a specific surface area(SSA)of 240.9 m^(2)·g^(-1),offering more electrochemically active sites for the storage of energy related to lithium ions.The rGO matrix held exceptional flexibility and functional structural rigidity,facilitating the swift ion intercalation and ensuring the high conductivity and recyclability of the structure.When applied to anodes designed for lithium-ion batteries(LiBs),this material demonstrated distinguished rate and ultra-high reversible capacity(872.98 mA·h·g^(-1) at 0.5 A·g^(-1)).Meanwhile,its capacity retention reached 119.5%after 500 cycles at 2 A·g^(-1),with a coulombic efficiency of 100%.This work potentially paves the way for generating fast and powerful metal selenide anodes and initiating LiBs with good performance.
关 键 词:CSe@C/rGO lithium-ion battery reduced graphene oxide electrochemicalperformance HETEROSTRUCTURE
分 类 号:TM912[电气工程—电力电子与电力传动] TB383[一般工业技术—材料科学与工程]
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