CO2- tolerant CuFe2O4 as Bifunctional Electrocatalyst for Transition from Rechargeable Li-O2 to Li-CO2 Batteries

IF 3.1 4区 工程技术 Q2 ELECTROCHEMISTRY
Sharafudeen Pamangadan C., Snehangshu Patra and Elumalai Perumal
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Abstract

CO2-tolerant rechargeable Lithium-Air batteries are seen as a high-performing alternative to Li-ion batteries. They utilize O2 from the air, reducing it at the cathode to form lithium peroxide (Li2O2) during discharge which is then oxidized to form lithium-metal and freeing O2 during charging. Most of the present studies involve pure O2 as the cathode material instead of aerial O2, which has a stiff-challenge due to atmospheric CO2 which produces Li2CO3 during discharge, posing a resistive load on the battery if not re-oxidized on charging. Ideally, presence of CO2 should enhance the charge-storage capacity if it is cycled reversibly. Thus, present research aims at taking advantage of both O2 and CO2 by employing metallic Cu on CuFe2O4 catalyst, synthesized from a one-step auto-combustion route. The Cu metal present in the catalyst leads to a low surface-area, yet the catalyst demonstrates excellent oxygen reduction reaction and moderate oxygen evolution reaction activity. excellent CO2 reduction reaction activity, oxidizing both the Li2O2 and the Li2CO3 during charge in both 10% CO2 and 100% CO2 atmospheres. The fabricated Li-CO2 battery operates for practical application, suggesting the suitability of the catalyst for the transition from practical Li-O2 battery to Li-Air battery.
耐二氧化碳的 CuFe2O4 作为双功能电催化剂实现从可充电锂-O2 电池到锂-CO2 电池的过渡
耐二氧化碳可充电锂空气电池被视为锂离子电池的高性能替代品。它们利用空气中的氧气,在放电时在阴极还原形成过氧化锂(Li2O2),然后氧化形成锂金属,并在充电时释放出氧气。由于大气中的 CO2 会在放电过程中生成 Li2CO3,如果充电时不重新氧化,就会对电池造成电阻负荷,因此,目前的大多数研究都将纯 O2 作为阴极材料,而不是将空气中的 O2 作为阴极材料。在理想情况下,如果电池可逆循环,二氧化碳的存在应能提高电池的储电能力。因此,本研究旨在通过采用一步法自燃路线合成的 CuFe2O4 催化剂上的金属铜,同时利用氧气和二氧化碳。催化剂中的金属铜导致其表面积较小,但却表现出极佳的氧还原反应活性和适度的氧进化反应活性,同时还表现出极佳的二氧化碳还原反应活性,在 10% CO2 和 100% CO2 的气氛中充电时都能氧化 Li2O2 和 Li2CO3。所制造的锂-CO2 电池可用于实际应用,这表明催化剂适用于从实用的锂-O2 电池过渡到锂-空气电池。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.20
自引率
12.80%
发文量
1369
审稿时长
1.5 months
期刊介绍: The Journal of The Electrochemical Society (JES) is the leader in the field of solid-state and electrochemical science and technology. This peer-reviewed journal publishes an average of 450 pages of 70 articles each month. Articles are posted online, with a monthly paper edition following electronic publication. The ECS membership benefits package includes access to the electronic edition of this journal.
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