| 摘要: | 隨著科技與人口的提升，對能源的需求量日益漸增，然而因石化燃料的浩劫與對環境的影響，導致人們轉往使用綠色能源，而許多綠能卻又被地形、氣候等繁多限制所侷限，導致其效用不佳且無法攜帶，然而鋰電池雖不可發電，卻可將能源儲存在可攜帶裝置內，並且轉換效率高，而受到重視，例如常見的手機、手錶、電腦等，在新興科技中的電動車、無人機等也是極為重要的零組件，並隨著科技的進步，人們對於鋰離子電池的能量密度與功率密度的需求漸增，其附帶的使得鋰電池的安全性受到極大的重視，故學者們紛紛提出各種方法提升其性能，並期望可同時改善安全性上的問題，其中以固態電解質取代傳統液態電解質被認為是最有效的方法之一，然而固態電解質目前面臨兩大問題，即為界面電阻過高與離子導率不佳，然而學者們目前提出的解決方式皆會面臨新的挑戰，其中以加入界面層及共燒結為目前介面改善的主要研究方向之一。本研究著重在界面上的改善，故以幾項實驗來提出解決方案，其中有以助燒結劑的方式來改善固態電解質燒結溫度與正極不匹配的問題，使共燒結成為可能的選項之一，亦有評估/開發新的電解質材料，並想以單一成分的方式製備出全電池，以防止電極與電解質因共燒結元素互相擴散，而形成高阻抗層，最後還有製備開發優良的丁二腈基介面修飾劑，以此抑制電解質與鋰金屬的不良副反應，以上的研究皆有不錯的效果，為未來鋰電池固態電解質實際運用上提供個一些不錯的建議與經驗。;With the advancement of technology and population growth, the demand for energy is increasing steadily. However, the catastrophic effects of fossil fuels on the environment have led people to shift towards the use of green energy. Yet, many renewable energy sources are limited by various factors such as terrain and climate, resulting in their limited effectiveness and lack of portability. On the other hand, although lithium batteries cannot generate electricity, they can store energy in portable devices and have high conversion efficiency. They have gained significant attention in common devices like mobile phones, watches, and computers, as well as in emerging technologies such as electric vehicles and drones, where they serve as vital components. With technological advancements, the demand for higher energy density and power density in lithium batteries has increased, placing a great emphasis on their safety. As a result, researchers have proposed various methods to improve their performance while addressing safety issues. One of the most effective approaches is considered to be replacing traditional liquid electrolytes with solid-state electrolytes. However, solid-state electrolytes currently face two major challenges: high interfacial resistance and poor ion conductivity. The solutions proposed by researchers to overcome these challenges also encounter new obstacles. Among them, the addition of interface layers and co-sintering is currently the main research direction for interface improvement. This study focuses on interface enhancement and proposes solutions through several experiments. These experiments include the use of sintering aids to address the mismatch between the sintering temperature of the solid-state electrolyte and the positive electrode, making co-sintering a viable option. The evaluation and development of new electrolyte materials are also being explored with the aim of preparing a full cell using a single component to prevent electrode-electrolyte interdiffusion and the formation of high-impedance layers. Finally, efforts are being made to prepare and develop excellent acrylonitrile-based interface modifiers to suppress adverse reactions between the electrolyte and lithium metal. The studies above have shown promising results, providing valuable suggestions and experiences for the practical application of solid-state electrolytes in future lithium batteries. |
