Fe_(3)O_(4) nanoparticles encapsulated in graphitized and inplane porous carbon nanocages derived from emulsified asphalt for a high-performance lithium-ion battery anode  

作　　者：Dandan Hu Linxiu Sui Jinjin Shi Dongfeng Li Yuxuan Zhang Yimeng Li Bingbing Hu Xiaoya Yuan 

机构地区：[1]School of Materials Science and Engineering,Chongqing Jiaotong University,Chongqing 400074,China [2]Institute of Advanced Functional Materials,Chongqing Jiaotong University,Chongqing 400074,China [3]Chongqing 2D Materials Institute,Liangjiang New Area,Chongqing 400044,China

出　　处：《Frontiers of Materials Science》2024年第2期89-100,共12页材料学前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(51402030);the Chongqing Special Key Project of Technological Innovation and Application Development(CSTB2022TIAD-KPX0031);the Team Building Project for Graduate Tutors in Chongqing(JDDSTD2022006);the Research and Innovation Program for Graduate Students in Chongqing(2023S0090);the National Innovation and Entrepreneurship Projects for College Students(202310618015).

摘　　要：In this work,C@Fe_(3)O_(4) composites were prepared through a typical template method with emulsified asphalt as carbon source,ammonium ferric citrate as transition metal oxide precursor,and NaCl as template.As an anode for lithium-ion batteries,the optimized C@Fe_(3)O_(4)-1:2 composite exhibits an excellent reversible capacity of 856.6 mA·h·g^(-1)after 100 cycles at 0.1A·g^(-1)and a high capacity of 531.1mA·h·g^(-1)after 300 cycles at 1 A·g^(-1),much better than those of bulk carbon/Fe_(3)O_(4) prepared without NaCl.Such remarkable cycling performance mainly benefits from its well-designed structure:Fe_(3)O_(4) nanoparticles generated from ammonium ferric citrate during pyrolysis are homogenously encapsulated in graphitized and in-plane porous carbon nanocages derived from petroleum asphalt.The carbon nanocages not only improve the conductivity of Fe_(3)O_(4),but also suppress the volume expansion of FesO4 effectively during the charge discharge cycle,thus delivering a robust electrochemical stability.This work realizes the high value-added utilization of low-cost petroleum asphalt,and can be extended to application of other transition-metal oxides-based anodes.

关 键 词：emulsified asphalt Fe_(3)O_(4)nanoparticle in-plane pore lithium-ion battery ANODE 

分 类 号：TM912[电气工程—电力电子与电力传动]