以Ni摻雜Mn3O4修飾管狀有序中孔洞碳材CMK-5於高能鋰離子電池負極材料之應用及複合式有機無機固(膠)態高分子電解質之結構鑑定與電化學特性研究

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/80385

Title:	以Ni摻雜Mn3O4修飾管狀有序中孔洞碳材CMK-5於高能鋰離子電池負極材料之應用及複合式有機無機固(膠)態高分子電解質之結構鑑定與電化學特性研究
Authors:	曾昱豪;Zeng, Yu-Hao
Contributors:	化學學系
Keywords:	中孔洞碳材;四氧化三錳;鋰離子電池;高分子電解質
Date:	2019-07-23
Issue Date:	2019-09-03 14:27:56 (UTC+8)
Publisher:	國立中央大學
Abstract:	本論文分為兩部分，第一部分主要是利用摻雜Ni的過渡金屬氧化物Mn3O4修飾於管狀有序中孔洞碳材CMK-5，以含浸法合成出Ni摻雜Mn3O4@CMK-5奈米複合材料，並應用於鋰離子電極的負極。Mn3O4的理論電容高達937 mAh/g，其含量豐富且毒性低，但具有過渡金屬氧化物充放電後體積變化大的缺點，利用中孔洞碳材CMK-5的有序孔道能有效抑制其體積膨脹及提升導電度，並摻入Ni作為晶格膨脹的緩衝劑，避免顆粒聚集情況的發生．藉此提升其電性表現，在電流密度100 mA/g下進行電性測試，經過50圈循環後，能得到高達1263 mAh/g的優異電容量表現。第二部分是複合式有機無機高分子電解質的合成，根據使用需求製成固態和膠態兩種型態，並應用於鋰離子電池的電解質。製備過程是以4,4′-Methylene diphenyl diisocyanate (MDI)作為交聯劑，與Jeffamine ED2003形成線性前驅物，並導入無機矽源GLYMO及MPEOPS進行聚合水解，合成出導電度優異的高分子電解質薄膜，其中固態電解質於30 °C下離子導電度達1.11 × 10-4 S cm-1，膠態電解質於30 °C下則高達1.86 × 10-3 S cm-1，後續組裝成硬幣型電池進行電性測試，顯示本研究之膠態電解質的循環表現優於市售隔離膜。 ;Transition metal oxides as anode materials in lithium ion batteries have attracted immense attention in recent years due to their high theoretical capacities as compared with commercial graphite. However, the huge volume change during the charge-discharge process leads to unstable electrochemical performances. In first part, we design a nanocomposite of Ni-doped Mn3O4@CMK-5 to solve the problem. Mn3O4 has high theoretical capacity (937 mAh/g), natural abundance and low toxicity. Ordered mesoporous carbon CMK-5 has nanoscale uniform mesopore, large surface area and good conducting network for both Li ions and electrons. Nickel doping could avoid the drastic volume change and aggregation of nanoparticles. Ni-doped Mn3O4@CMK-5 display a high reversible capacity up to 1263 mAh/g enen after 50 cycles at a current density of 100 mAh/g. The Ni-doped Mn3O4@CMK-5 nanocomposite is expected to be a promising anode material for lithium-ion batteries. In second part, we design a new hybrid organic-inorganic polymer electrolyte, base on 4,4′-Methylene diphenyl diisocyanate (MDI), Jeffamine ED2003, and silica sources like GLYMO and MPEOPS. The solid polymer electrolyte(SPE) was measured the ion conductivity value of 1.11 × 10-4 S cm-1 at 30 °C. A maximum ion conductivity value of 1.86 × 10-3 S cm-1 is achieved for the gel polymer electrolytes(GPE) immersed in liquid electrolyte solution. And as the gel electrolyte, the test cell shows good cycling performance. The new hybrid polymer system hold promise for application in lithium ion batteries.
Appears in Collections:	[Graduate Institute of Chemistry] Electronic Thesis & Dissertation

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