当前位置: X-MOL 学术J. Alloys Compd. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
MoS2 nanosheets grown on carbon cloth as a bifunctional cathode for long-life Na–O2 batteries
Journal of Alloys and Compounds ( IF 5.8 ) Pub Date : 2021-06-04 , DOI: 10.1016/j.jallcom.2021.160702
Xiao-dong Wang , Xiong Zhang , Ming Tang , Qin-yin Shen , Jin-ling Ma

When sodium (Na)–oxygen (O2) batteries discharge, O2 is reduced on the cathode to form solid sodium oxides deposited on cathode, severely impeding the mass transfer path and causing large voltage polarization, low energy efficiency and poor rate performance. Therefore, a novel cathode is the key to solving the above issues. Here, in-situ growing molybdenum disulfide on carbon cloth (MoS2/CC) as a binder-free cathode is prepared by a simple and facile hydrothermal method. When this cathode is tested in Na–O2 batteries, it presents enhanced oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalytic activity as well as large discharge capacity. What's more, Na–O2 batteries with the MoS2/CC cathode simultaneously produce sodium superoxide (NaO2) and poor crystalline sodium peroxide (Na2O2), which greatly reduces the charge potential.



中文翻译:

在碳布上生长的MoS 2纳米片作为长寿命 Na-O 2电池的双功能阴极

当钠(Na)-氧(O 2)电池放电时,阴极上的O 2被还原,形成沉积在阴极上的固体氧化钠,严重阻碍传质路径,导致电压极化大、能效低和倍率性能差。因此,一种新型阴极是解决上述问题的关键。在这里,通过简单易行的水热法制备了作为无粘合剂正极的碳布(MoS 2 /CC)上原位生长的二硫化钼。当该阴极在 Na-O 2电池中进行测试时,它表现出增强的氧还原反应 (ORR) 和析氧反应 (OER) 催化活性以及大的放电容量。更重要的是,带有 MoS 的Na-O 2电池2 /CC 阴极同时产生超氧化钠(NaO 2)和结晶性差的过氧化钠(Na 2 O 2),大大降低了充电电位。

更新日期:2021-06-09
down
wechat
bug