文章信息/Info

Title:

Research Progress of Lithium Oxygen Batteries based on Redox Catalysis

作者:

朱允廣;  王慶

新加坡國立大學(xué)

Author(s):

ZHU Yun Guang;  WANG Qing

Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore

關(guān)鍵詞:

鋰空氣電池; 均相催化劑;  氧化還原靶向反應(yīng); 高能量密度; 高功率密度; 鋰空氣氧化還原液流電池

Keywords:

lithium oxygen battery;  homogeneous catalyst;  redox targeting reaction;  high energy density;  redox flow lithium oxygen battery

DOI:

10.7502/j.issn.1674-3962.2017.10.01

文獻(xiàn)標(biāo)志碼:

A

摘要:

由于高的理論能量密度，鋰空氣電池被看作最有前景的能源存儲系統(tǒng)之一。但是，目前仍有許多因素制約著它的發(fā)展，比如大的極化電壓、差的循環(huán)穩(wěn)定性、電解液以及空氣電極的不穩(wěn)定性等。此前，研究人員重點(diǎn)研究了各種固態(tài)電催化劑來解決上述問題。但由于固態(tài)催化劑的自身特性，它并不能解決空氣電極的表面鈍化以及孔隙的堵塞問題，因此人們開始轉(zhuǎn)向均相催化劑。從金屬空氣電池的結(jié)構(gòu)來看，由于正極的有效空間有限，即使均相催化劑也不能從根本上解決正極的鈍化和堵塞問題。因此，我們設(shè)計了一種新的鋰空氣電池裝置——氧化還原液流鋰空氣電池，來徹底解決上述的兩個問題。在此文最后，我們將根據(jù)目前基礎(chǔ)研究和實(shí)際應(yīng)用之間的差距，簡要討論未來鋰空氣電池的發(fā)展。（6號 宋體）

Abstract:

Lithium oxygen battery is considered as one of the most promising energy storage systems due to its high theoretical energy density. However, its development is severely hindered by the large overpotentials and poor cycling stability. Efforts have previously been taken on the development of various types of electrocatalysts to enhance the electrode reactions. However, issues pertaining to surface passivation and pore clogging of the cathode remain. Homogenous catalysis with soluble redox mediators thus comes to the attention. While effective in addressing the surface passivation issue, pore clogging problem remains unsolved due to the limited space in the cathode. Therefore, redox flow lithium oxygen battery was proposed by introducing a gas diffusion tank, which elegantly overcomes these hurdles. Lastly, the gap between present research work and practical applications, as well as future development of lithium oxygen battery is briefly discussed.