当前位置: X-MOL 学术Int. J. Energy Res. › 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.)
Dual coating strategy of CoS2@Co@C toward fast insertion/extraction anode material for sodium‐ion batteries
International Journal of Energy Research ( IF 4.6 ) Pub Date : 2020-11-14 , DOI: 10.1002/er.6147
Haya A. Abubshait 1, 2 , Thamraa Alshahrani 3 , Hala H. Alhashim 4, 5 , Tahani H. Flemban 4, 5 , Ghulam Ali 6 , Qasim Mahmood 4, 5 , Amel Laref 7 , Nessrin A Kattan 8
Affiliation  

Rechargeable sodium‐ion batteries are facing the challenge of highly electrochemical active anode for their realization. In this study, we report a dual coating strategy of CoS2 with metallic Co particles and carbon to boost the charge transfer and stability. The phase of CoS2 and the existence of Co metallic particles were confirmed using x‐ray diffraction (XRD). x‐ray photoelectron spectroscopy (XPS) results corroborate the presence of carbon and CoS bonding. The prepared CoS2@Co@C anode reveals high performance where it shows a capacity of 712 mA h g−1 at 0.05 C rate. The CoS2@Co@C electrode exhibits exceptional high rate capability where it exhibits a capacity of 260 mA h g−1 at elevated rate of 10.0 C. The cyclability of CoS2@Co@C anode is tested at 0.05 C and 0.5 C rates where the electrode shows 78% and 45% capacity retention of stabilized capacity. The reaction mechanism of the CoS2@Co@C electrode is determined using x‐ray absorption spectroscopy (XAS) and the results show reversibility of the material.

中文翻译:

CoS2 @ Co @ C的双重涂覆策略可用于钠离子电池的快速插入/取出阳极材料

可充电钠离子电池的实现面临着高度电化学活性阳极的挑战。在这项研究中,我们报告了CoS 2与金属Co颗粒和碳的双重涂层策略,以提高电荷转移和稳定性。使用X射线衍射(XRD)确认了CoS 2的相和Co金属颗粒的存在。X射线光电子能谱(XPS)的结果证实了碳和CoS键的存在。制备的CoS 2 @ Co @ C阳极表现出高性能,在0.05 C速率下显示出712 mA h g -1的容量。CoS 2 @ Co @ C电极具有出众的高倍率能力,其容量为260 mA h g-1在10.0 C的升高速率下。CoS 2 @ Co @ C阳极的循环能力在0.05 C和0.5 C的速率下进行测试,其中电极显示了稳定容量的78%和45%的容量保持率。使用X射线吸收光谱法(XAS)确定了CoS 2 @ Co @ C电极的反应机理,结果表明该材料具有可逆性。
更新日期:2020-11-14
down
wechat
bug