基于过期废药急支颗粒碳化的锂离子电池氮掺杂碳微球负极材料
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摘要
通过水热和高温热解碳化联用的方法回收过期废药急支颗粒制备碳微球材料,并研究其微观形貌、元素组成及电化学储锂性能。结果表明:碳微球的平均粒径约为3.5μm,且少量氮元素以原位掺杂的形式保留;即使在高达7 A/g的电流密度循环充/放电500圈时,碳微球电极的可逆充电比容量仍为101 mA?h/g,表现了良好的高倍率充/放电循环稳定性。
The expired acute bronchitis granules were recycled via hydrothermal and pyrolysis carbonization to prepare carbon microspheres, and the corresponding micro-morphology, element composition and electrochemical performances were investigated.The results show that the mean particle size of carbon microspheres is 3.5 μm, N element can be kept in the form of in-situ doping,and carbon microspheres anode delivers a reversible charge capacity of 101 mA?h/g even at a high current density of 7 A/g for 500 cycles, indicating a high stability during the fast cyclic charge/discharge.
The expired acute bronchitis granules were recycled via hydrothermal and pyrolysis carbonization to prepare carbon microspheres, and the corresponding micro-morphology, element composition and electrochemical performances were investigated.The results show that the mean particle size of carbon microspheres is 3.5 μm, N element can be kept in the form of in-situ doping,and carbon microspheres anode delivers a reversible charge capacity of 101 mA?h/g even at a high current density of 7 A/g for 500 cycles, indicating a high stability during the fast cyclic charge/discharge.
引文
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[3]YU C,HOU H,LIU X,et al.Old-loofah-derived hard carbon for long cyclicity anode in sodium ion battery[J].Int J Hydrogen Energy,2018,43(6):3253-3260.
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[5]SHANG S,YANG X,TAO X M.Easy synthesis of carbon nanotubes with polypyrrole nanotubes as the carbon precursor[J].Polymer,2009,50(13):2815-2818.
[6]ZHENG F,YANG Y,CHEN Q.High lithium anodic performance of highly nitrogen-doped porous carbon prepared from a metal-organic framework[J].Nat Commun,2014,5(5):5261-5270.
[7]WIGGINSCAMACHO J D,STEVENSON K J.Effect of nitrogen concentration on capacitance,density of states,electronic conductivity,and morphology of N-doped carbon nanotube electrodes[J].J Phys Chem C,2015,113(44):19082-19090.
[8]CHANG J C,TZENG Y F,CHEN J M,et al.Carbon nanobeads as an anode material on high rate capability lithium ion batteries[J].Electrochim Acta,2009,54(27):7066-7070.
[9]HAN Y,LI H,LI J,et al.Hierarchical mesoporous iron fluoride with superior rate performance for lithium ion batteries[J].ACSAppl Mater Inter,2016,8(48):32869-32874.
[10]JIE W,SHEN L,LI H,et al.A facile one-pot synthesis of TiO2/nitrogen-doped reduced graphene oxide nanocomposite as anode materials for high-rate lithium-ion batteries[J].Electrochim Acta,2014,133(7):209-216.
[11]ZHANG W H,YUE M.Study of exchange current density of carbon anode materials for Li-ion battery[J].Chinese J Power Sources,2010,34(3):223-225.
[12]侯宏英,段继祥,廖启书,等.多级ZnO纳米片/Fe负极的制备及锂电性能[J].硅酸盐学报,2018,46(1):35-39.HOU Hongying,DUAN Jixiang,LIAO Qishu,et al.J Chin Ceram Soc,2018,46(1):35-39.
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