以废弃的稻谷壳为原料,基于酸解-水热碳化-刻蚀法制备了无定形多孔碳材料,采用X射线衍射仪(XRD)、拉曼光谱(Raman)和扫描电子显微镜(SEM)表征了材料结构及形貌,并结合恒流充放电技术测试了材料的电化学性能。结果表明,获得的无定形碳材料呈现出多孔结构,碳电极的首次可逆容量为171.6mAh/g,经历30次循环后依然能保持146.7mAh/g的可逆容量,比未刻蚀碳电极容量(96.3mAh/g)高52%。刻蚀碳电极表现出优异的循环稳定性能,缘于碳材料的多孔结构,可加快锂离子在本体材料和电极/电解液界面间的传输。
The amorphous porous carbon materials from rice hull were prepared by acid hydrolysis-hydrothermal carbonization-etching method.The structure and morphology of the material were characterized by X-Ray Diffractometer(XRD),raman spectrum(Raman) and scanning electron microscope(SEM).The electrochemical performance was investigated by constant current charge/discharge technique.The results shown that the higher initial specific capacity of 171.6mAh/g can be obtained and the reversible capacity of 146.7mAh/g still be retained after 30 cycles,which was about 52% higher than the untreated electrode (96.3mAh/g).The etched electrode exhibited superior cycling behavior,and it was ascribing to the porous structure,accelerating the transfer of lithium ion in the bulk material and electrode/electrolyte interface.
[1] 田文卿,吴雪艳,魏霄.咖啡渣制备多孔碳材料及其在锂离子电池上的应用[J].吉林大学学报(理学版),2014,52(4):802-806.
[2] Li C,Zhang Y Z,Lin C H,et al.Hierarchically porous nitrogen-rich carbon derived from wheat straw as an ultra-high-rate anode for lithium ion batteries[J].Journal of Materials Chemistry A,2014,2:9684-9690.
[3] Lv W M,Wen F S,Xiang J Y,et al.Peanut shell derived hard carbon as ultralong cycling anodes for lithium and sodium batteries[J].Electrochimica Acta,2015,176:533-541.
[4] Sun X,Wang X,Feng N,et al.A new carbonaceous material derived from biomass source peels as an improved anode for lithium ion batteries[J].Journal of Analytical and Applied Pyrolysis,2013,100:181-185.
[5] Fey G T,Cho Y D,Chen C L,et al.Pyrolyticcarbons from acid/base-treated rice husk as lithium-insertion anode materials[J].Pure and Applied Chemistry,2010,82(11):2157-2165.
[6] Gao Y,Li L,Jin Y M,et al.Performance of electrical double layer capacitors with porous carbons derived from rice husk[J].Materials Chemistry and Physics,2003,80:704-709.
[7] Wang Q,Zhu X,Liu Y,et al.Rice husk-derived hard carbons as high-performance anode materials for sodium-ion batteries[J].Carbon,2018,127:658-666.
[8] Yi Y,Performance of porous carbon as catalyst support for anode from rice husk in a direct methanol fuel cell[J].International Journal of Electrochemical Science,2016,11(7):5909-5923.
[9] Zhang Y C,You Y,Xin S,et al.Rice husk-derived hierarchical silicon/nitrogen-doped carbon/carbon nanotube spheres as low-cost and high-capacity anodes for lithium-ion batteries[J].Nano Energy,2016,25:120-127.
[10] Fan Y,Yang X,Zhu B,et al.Micro-mesoporous carbon spheres derived from carrageenan as electrode material for supercapacitors[J].Journal of Power Sources,2014,268(3):584-590.
[11] 王杰.锂离子电池碳负极材料的合成及性能表征[D].上海:复旦大学,2012.
[12] Wang Z H,Yang J Y,Wu X W,et al.Enhanced electrochemical performance of porous activated carbon by forming composite with graphene as high-performance supercapacitor electrode material[J].Journal of Nanoparticle Research,2017,19(2):77-86.
[13] Yazami R,Reynier Y F.Mechanism of self-discharge in graphite-lithium anode[J].Electrochimica Acta,2003,47(8):1217-1223.
[14] Hwang Y J,Jeong S K,Nahm K S,et al.Pyrolytic carbon derived from coffee shells as anode materials for lithium batteries[J].Journal of Physics and Chemistry of Solids,2007,68(2):182-188.
基金资助
国家青年自然科学基金项目(51602046);中央高校基本科研业务费项目资助(2572018BC30);东北林业大学生创新项目资助(KY2017005)
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