杨梅状碳包覆四氧化三铁复合材料的制备及锂离子电池负极性能  

Preparation of Waxberry-Like Carbon-Coated Fe_(3)O_(4)Composites and Exploration on Performance of Lithium-ion Battery Anode

作　　者：吴臻 王相 汪双双 尹艳镇 梁兴唐 张斌斌 黄蓉 易甜甜 朱诗婷 覃子林 陈梓润 Zhen Wu;Xiang Wang;Shuangshuang Wang;Yanzhen Yin;Xingtang Liang;Binbin Zhang;Rong Huang;Tiantian Yi;Shiting Zhu;Zilin Qin;Zirun Chen(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Guangxi Key Laboratory of Green Chemical Materials and Safety Technology,Beibu Gulf University,Qinzhou 535011,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]北部湾大学广西绿色化工新材料与安全技术重点实验室,广西钦州535011

出　　处：《高分子材料科学与工程》2024年第3期153-162,共10页Polymer Materials Science & Engineering

基　　金：广西科技基地与人才专项(桂科AD22035007);广西高校中青年教师科研基础能力提升项目(2022KY0424);北部湾大学高层次人才科研启动项目(2021KYQD04)。

摘　　要：Fe_(3)O_(4)被认为是一种储锂性能优异的锂离子电池负极材料,但目前仍存在导电性差和充放电过程体积膨胀问题。文中以L-精氨酸、对苯二甲醛和九水硝酸铁为原料,通过溶剂热反应得到铁离子掺杂L-精氨酸聚合物(W-Fe_(3)O_(4)@NC precursors),随后高温热解制备了杨梅状碳包覆四氧化三铁(W-Fe_(3)O_(4)@NC)复合负极材料。对W-Fe_(3)O_(4)@NC的形貌、表面化学结构、孔隙率和在锂离子电池负极中的电化学性能进行了表征。结果表明,得益于独特的杨梅状形貌、有益的氮掺杂、高度分散的Fe_(3)O_(4)纳米微粒和均匀的碳包覆,W-Fe_(3)O_(4)@NC在1 A/g电流密度下循环800圈后比容量高达815.1 mAh/g,在5 A/g的大电流密度下,比容量仍保持在232 mAh/g,循环稳定性和倍率性能显著优于纯碳材料(NC)和市售Fe_(3)O_(4)纳米粒子。Fe_(3)O_(4)is considered as potential anode material for lithium-ion batteries with excellent lithium storage performance,but there are still issues of poor conductivity and volume expansion during charging and discharging.In this paper,L-arginine,p-phenylenediamine,and iron(III)nitrate nonahydrate were used as raw materials to synthesize iron-doped L-arginine polymer(W-Fe_(3)O_(4)@NC precursor)through solvent thermal reaction.Subsequently,the waxberry-like carbon-coated Fe_(3)O_(4)composite(W-Fe_(3)O_(4)@NC)was prepared by carbonization of the W-Fe_(3)O_(4)@NC precursor.The morphology,surface chemical structure,porosity,and electrochemical performance as lithium-ion battery anode of W-Fe_(3)O_(4)@NC were characterized.Benefit from the unique waxberrylike shape,beneficial nitrogen doped,highly dispersed Fe_(3)O_(4)nanoparticles,and uniform carbon coating,the specific capacity of W-Fe_(3)O_(4)@NC reaches to 815.1 mAh/g after 800 cycles at a current density of 1 A/g and still remains 232 mAh/g at a current density of 5 A/g,which surpass those of NC and commercial Fe_(3)O_(4)nanoparticles,demonstrating excellent cycling stability and rate performance.

关 键 词：L-精氨酸聚合物 四氧化三铁 杨梅状 锂离子电池 负极材料 

分 类 号：TM912[电气工程—电力电子与电力传动]