本文選題：鋰離子電池 + 負極　； 參考：《華東師范大學(xué)》2017年碩士論文

【摘要】：鋰離子電池是一種極為重要的儲能手段,現(xiàn)已在我們的生產(chǎn)生活之中得到了極為廣泛的應(yīng)用。關(guān)于鋰離子電池電極材料的開發(fā)吸引了大量研究者的關(guān)注。金屬有機框架材料憑借其三維多孔結(jié)構(gòu)、孔道尺寸靈活可調(diào)節(jié)以及金屬中心和橋連配體多樣性可替換等優(yōu)點成為了一種極具開發(fā)前景的鋰離子電池負極材料。我們在金屬有機框架材料中引入雙金屬體系,獲得了比單金屬體系更為優(yōu)異的性能。首先,我們在Mn-BTC單金屬有機框架材料的基礎(chǔ)上進行改進,向其中摻雜金屬鈷,合成了具有更高比容量以及更好的電化學(xué)穩(wěn)定性的雙金屬有機框架材料MnCo-BTC。在文中通過各種表征及測試手段了解這一新材料的形貌結(jié)構(gòu)、化學(xué)組成以及電化學(xué)性能。MnCo-BTC展現(xiàn)了極為優(yōu)異的電化學(xué)性能,在100 mA·g-1的速率下進行充放電,150圈后仍然擁有901 mAh·g-1的性能。將充電速率增大到500 mA·g-1時,100次循環(huán)后容量仍可達到445.3 mAh·g-1。其次我們還研究了一個全新的雙金屬體系的有機框架材料——CoZn-BTC,并將其應(yīng)用作為鋰離子電池的負極。我們通過控制和篩選不同的投料比例、反應(yīng)時間、以及是否進行熱處理等條件,不斷地對CoZn-BTC的性能進行優(yōu)化。最后得到了在一定范圍內(nèi)的最佳合成條件,此時的CoZn-BTC在100 mA·g-1的充電速率下進行充放電測試,100次循環(huán)后仍然擁有994.7 mA·g-1的性能。
[Abstract]:The lithium ion battery is a very important means of energy storage, is now in our daily life has been widely used. The development of electrode materials for lithium ion batteries has attracted a lot of attention from researchers. The metal organic framework materials because of its porous structure, pore size adjustable and flexible metal center and the bridging ligand diversity can replace the advantages as cathode material of lithium ion battery, a great development prospects. We introduce the bimetallic system in metal organic framework materials, obtained more excellent performance than single metal system. First, we improved Mn-BTC based on single metal organic framework materials. To which, doped cobalt metal, with more specific capacity and better electrochemical stability of the double metal organic framework materials MnCo-BTC. and characterized by various testing methods in the synthesis of To understand the morphology and structure of the new material, the chemical composition and electrochemical properties of.MnCo-BTC show a very excellent electrochemical performance, charge and discharge at a rate of 100 mA - g-1, the performance after 150 laps still have 901 mAh - g-1. The charging rate increases to 500 mA - g-1, mAh - g-1. and 445.3 we also studied the organic framework material -- CoZn-BTC a new bimetallic system capacity could reach 100 cycles, and its application as anode of lithium ion battery. We can control and screening of different feed ratio, reaction time, and heat treatment conditions, constantly on the performance of CoZn-BTC optimized. Finally the optimum conditions in a certain range, the CoZn-BTC charge discharge test in the charging rate of 100 mA - g-1, the performance after 100 cycles still have 994.7 mA - g-1.

【學(xué)位授予單位】：華東師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM912

【參考文獻】

相關(guān)博士學(xué)位論文 前1條

1 李輝;鋰離子電池負極材料的水熱法制備及其電化學(xué)性能[D];浙江大學(xué);2009年

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本文編號：1742578