当前位置：
X-MOL 学术
›
ACS Appl. Energy Mater.
›
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.)
T-Nb2O5@NbS2@C Composites Based on the Intercalation–Conversion Mechanism as an Anode Material for Li-Ion Batteries
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-10-27 , DOI: 10.1021/acsaem.1c02165 Caifeng Pan 1 , Jiankai Kang 1 , Qian Xie 1 , Qingyu Li 1 , Wei Yang 1, 2 , Hanbo Zou 1 , Shengzhou Chen 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-10-27 , DOI: 10.1021/acsaem.1c02165 Caifeng Pan 1 , Jiankai Kang 1 , Qian Xie 1 , Qingyu Li 1 , Wei Yang 1, 2 , Hanbo Zou 1 , Shengzhou Chen 1
Affiliation
|
Design of suitable composite materials and improvement of the corresponding electrochemical properties based on the intercalation–conversion mechanism are still challenging for Li storage devices. Nb2O5@NbS2 composites are prepared by a facile oil-phase synthetic process with carbon disulfide as the sulfur source and further synthesizing carbon by subsequent carbonization. As a result, the introduction of NbS2 with a conversion mechanism can effectively improve the low theoretical specific capacity of Nb2O5 with an intercalation mechanism in the field of lithium-ion anodes, and the in situ synthesized carbon overcomes poor conductivity of pure Nb2O5. Thus, the T-Nb2O5@NbS2@C electrode material delivered a higher reversible capacity of 636 mAh g–1 at 0.1 A g–1 than the T-Nb2O5 electrode with a capacity of 173 mAh g–1. Additionally, it also displayed a better cycle performance at a current density of 0.5 A g–1 after 400 cycles. Compared with the T-Nb2O5 electrode, its capacitance retention has increased by 21%. This work can be helpful to investigate a similar electrochemical mechanism of hybrid electrodes for energy storage systems.
中文翻译：
基于插层转换机制的T-Nb2O5@NbS2@C复合材料作为锂离子电池负极材料
基于嵌入-转化机制设计合适的复合材料和改善相应的电化学性能对于锂存储设备来说仍然具有挑战性。Nb 2 O 5 @NbS 2复合材料是通过简便的油相合成工艺制备的，以二硫化碳为硫源，然后通过碳化进一步合成碳。因此，在锂离子负极领域，具有转化机制的NbS 2的引入可以有效改善具有插层机制的Nb 2 O 5理论比容量低的问题，原位合成碳克服了纯碳导电性差的问题。铌2 O5 . 因此，与容量为 173 mAh g –1的 T-Nb 2 O 5电极相比，T-Nb 2 O 5 @NbS 2 @C 电极材料在 0.1 A g –1时提供了更高的可逆容量 636 mAh g –1 – 1 . 此外，它还在 0.5 A g –1的电流密度下在 400 次循环后显示出更好的循环性能。与T-Nb 2 O 5电极相比，其电容保持率提高了21%。这项工作有助于研究用于储能系统的混合电极的类似电化学机制。
更新日期：2021-11-22
中文翻译：
基于插层转换机制的T-Nb2O5@NbS2@C复合材料作为锂离子电池负极材料
基于嵌入-转化机制设计合适的复合材料和改善相应的电化学性能对于锂存储设备来说仍然具有挑战性。Nb 2 O 5 @NbS 2复合材料是通过简便的油相合成工艺制备的，以二硫化碳为硫源，然后通过碳化进一步合成碳。因此，在锂离子负极领域，具有转化机制的NbS 2的引入可以有效改善具有插层机制的Nb 2 O 5理论比容量低的问题，原位合成碳克服了纯碳导电性差的问题。铌2 O5 . 因此，与容量为 173 mAh g –1的 T-Nb 2 O 5电极相比，T-Nb 2 O 5 @NbS 2 @C 电极材料在 0.1 A g –1时提供了更高的可逆容量 636 mAh g –1 – 1 . 此外，它还在 0.5 A g –1的电流密度下在 400 次循环后显示出更好的循环性能。与T-Nb 2 O 5电极相比，其电容保持率提高了21%。这项工作有助于研究用于储能系统的混合电极的类似电化学机制。
京公网安备 11010802027423号