LiNi1/3Mn1/3Co1/3O2正極材料於高溫循環特性研究

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題名:
LiNi1/3Mn1/3Co1/3O2正極材料於高溫循環特性研究
著者: 陳淑芬; Chen, Shih-feng
張家欽; Chia-Chin Chang; 綠色能源科技學系碩士班
主題: 鋰離子電池; 鋰鎳錳鈷氧化物; 添加劑; lithium nickel manganese cobalt oxide; electrolyte additives; lithium ion battery
描述: 今日環境保護議題格外重視，其中二次電池-鋰離子電池將成為具環保概念電動車動力搭配元件，然而對於電動車用鋰離子電池，其性能要求也越來越嚴苛，對其電容量與循環穩定性更是要求，其中正極材料鋰鎳錳鈷氧化物有較高工作電壓外，在循環特性及價格上逐漸取代廣泛運用的鋰鈷氧化物，因此相當有潛力應用於電動車用鋰離子電池正極材料。然而在高電壓下將使鋰鎳錳鈷氧化物與電解液產生反應造成較快速衰退，而此研究在於電解液中加入幫助形成固液界面膜(SEI)的添加劑以期望改善其高電壓與高溫循環特性。研究結果顯示，電解液經2wt%ADM 添加劑加入，能有效改善高溫下循環特性，並於100次循環後，發現有ADM添加劑將比未添加的穩定性高出46.1%，並藉由掃描式電子顯微鏡觀察其材料表面SEI型態，發現有添加劑的SEI較具有保護功效，並於ICP-OES中證實其SEI膜有助於減少金屬離子的溶出。
The issue of has been environmental protection earned lots of concern in recent years. Lithium-ion secondary battery is a green power components element for electric vehicle. Now, the demands for the battery performance are stringent, especially for the energy capacity and cycling stability. Comparing to other cathode materials, LiNi1/3Mn1/3Co1/3O2 composite has better cycling performance, higher working voltage. It has good potential for the application for on the cathode materials while the LiNi1/3Mn1/3Co1/3O2 deceases quickly after the reaction with the electrolyte at high voltage. The result showed that the electrolyte additive using in this working can help to form the solid electrolyte interphase (SEI) which can improve the cycling performance at high temperatures and working voltages. It also showed that the electrolyte additive 2wt% ADM can effectively improve the high temperature cycle performance after 100 cycles (keeps at 46.1%). The material analysis of LiNi1/3Mn1/3Co1/3O2 cathode after 100 cycles was investigated by scanning electron microscope and the inductively couple plasma optical emission spectrometry. These results confirmed that the SEI film can help to reduce the metal ion dissolution.
碩士
建立日期: 2013
格式: 121 bytes
text/html
語言: 中文
識別號: http://nutnr.lib.nutn.edu.tw/handle/987654321/588
資源來源: NUTN IR

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LiNi1/3Mn1/3Co1/3O2正極材料於高溫循環特性研究

陳淑芬; Chen, Shih-feng 張家欽; Chia-Chin Chang; 綠色能源科技學系碩士班 2013

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