以金屬氧化物NiO和Mn3O4摻入有序中孔洞碳材作為鋰離子電池負極材料之應用;Electrochemical Performance of Lithium Ion Batteries with Anode-based NiO and Mn3O4 nanoparticles confined in Ordered Mesoporous Carbons

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题名:	以金屬氧化物NiO和Mn3O4摻入有序中孔洞碳材作為鋰離子電池負極材料之應用;Electrochemical Performance of Lithium Ion Batteries with Anode-based NiO and Mn3O4 nanoparticles confined in Ordered Mesoporous Carbons
作者:	陳秀真;Hsiu-Chen, Chen
贡献者:	化學學系
关键词:	鋰離子電池;中孔洞碳材;氧化金屬;負極;Lithium Ion Batteries;Mesoporous Carbons;Anode
日期:	2017-07-18
上传时间:	2017-10-27 12:56:41 (UTC+8)
出版者:	國立中央大學
摘要:	本論文主要探討利用含高理論電容氧化金屬參雜在有序結構規則中孔洞奈米碳材CMK-8用用至鋰離子二次電池負極材料上的複合材料，起初利用高分子界面活性劑P123做為軟性模板並以矽酸乙脂(Tetraethyl orthosilicate，簡稱為 TEOS)作為矽的來源，合成出有序的Ia3 ̅d特性的Cubic KIT-6 矽材，接著將矽材碳化之後得到CMK-8，再利用含浸法將金屬氧化物至入CMK-8孔洞中，利用XRD、BET、TEM來鑑定其結構是高表面積且規則的中孔洞碳才。　　本論文金屬氧化物包含兩種，分別是Mn3O4和NiO，利用硝酸鎳和硝酸錳作為含浸金屬氧化物的前驅物，依據不同濃度，0.25 M、0.1 M、0.05 M含浸到CMK-8的中孔洞及孔道當中，從XRD估算金屬氧化物顆粒大小，且以TEM來觀測，與之相符合，可以觀察到粒子大小會隨著濃度改變，電性表現也會因為顆粒的大小有所不同，比原本基材CMK-8的電性表現會提高，本篇論文會針對不同濃度及金屬氧化物顆粒大小利用做比較和結論。 ;Lithium-ion batteries (LIBs) have been commonly used as power sources in portable electronics. Although ordered mesoporous carbon CMK-8 has been used as an anode for lithium-ion batteries, its theoretical capacity is only 372 mA h g-1. To improve the reversible capacity, cycling stability, and electrochemical performance of CMK-8 based anodes for applications in LIBs, two types of metal oxides such as NiO (theoretical capacity = 718 mA h g-1) and Mn3O4 (theoretical capacity = 937 mA h g-1) were chosen to embed into the mesopores of CMK-8 separately in this study. The mesopores of CMK-8 can effectively limit the particle growth of metal oxide and accommodate the volume variation of metal oxides during charge-discharge. Metal oxide@CMK-8 can also improve electronic conductivity. The metal oxide@CMK-8 materials were characterized by SEM, TEM, powder X-ray diffraction, and nitrogen adsorption-desorption measurements. The electrodes for LIBs were fabricated using a mixture of the active materials, namely metal oxide@CMK-8 materials (80 wt.%), carbon black (10 wt.%), and polyvinylidene fluoride (PVDF, 10 wt.%) in N-methyl-2-pyrrolidone (NMP) , The electrochemical performance was tested by assembling CR2032 coin cell.
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