Prussian blue analogues-derived nitrogen-doped carboncoated FeO/CoO hollow nanocages as a high-performance anode material for Li storage  

作　　者：Chen Liu Shuang Yuan Yang Yang Xiao-Xi Zhao Xiao Duan Bin Cao Qiang Wang 

机构地区：[1]School of Metallurgy,Northeastern University,Shenyang 110819,China [2]Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,China [3]Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education),Northeastern University,Shenyang 110819,China [4]Department of Design and Engineering,Faculty of Science and Technology,Bournemouth University,Poole,Dorset BH125BB,UK

出　　处：《Rare Metals》2023年第12期4070-4080,共11页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.52274294);the Fundamental Research Funds for the Central Universities (No.N2124007-1)。

摘　　要：The design of electrode materials with specific structures is considered a promising approach for improving the performance of lithium-ion batteries(LIBs).In this paper,FeO/CoO hollow nanocages coated with a N-doped carbon layer(FCO@NC)was prepared using Fe-Co-based Prussian blue analogs(PBA)as a precursor.During the synthesis,dopamine was the carbon and nitrogen source.The reducing atmosphere was assured via NH_3/Ar,which regulated the vacancies in the structure of FCO@NC as well as increased its conductivity.When used as anode materials for LIBs,the FCO@NC nanocages deliver a high reversible capacity of 774.89 mAh·g^(-1)at 0.3 A·g^(-1)after200 cycles with a capacity retention rate of 80.4%and426.76 mAh·g^(-1)after 500 cycles at a high current density of 1 A·g^(-1).It is demonstrated that the hollow nanocage structure can effectively enhance the cycle stability,and the heat treatment in NH_(3)/Ar atmosphere contributes to the oxygen vacancy content of the electrode materials,further facilitating its conductivity and electrochemical performance.

关 键 词：Prussian blue analogue(PBA) Oxygen vacancy Hollow nanocage Nitrogen doping Lithium ion batteries(LIBs) 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]