当前位置: X-MOL 学术Electrochim. Acta › 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.)
One-step fabrication of in situ carbon-coated NiCo2O4@C bilayered hybrid nanostructural arrays as free-standing anode for high-performance lithium-ion batteries
Electrochimica Acta ( IF 6.6 ) Pub Date : 2018-04-05
Yu Wang, Pengcheng Liu, Kongjun Zhu, Jing Wang, Kang Yan, Jinsong Liu

Rapid developments in revolutionary electric vehicles have led to an increase in the energy-density and cycling-life requirements for Li-ion batteries (LIBs). The binary transition metal oxide NiCo2O4 is attracting considerable attention due to its much larger specific capacity than graphite. However, NiCo2O4 suffers from poor cycling performance owing to a large volume change during cycling. To address this problem, we proposed an easy strategy to fabricate in situ carbon-coated NiCo2O4 bilayered hybrid nanostructural arrays supported on Ni foam (denoted as NiCo2O4@C BHNAs–NF) as free-standing anodes for LIBs through a sucrose-assisted hydrothermal method. The in situ-synthesized uniform carbon shell can simultaneously buffer the volume change during cycling and increase the conductivity. The micro/nano-structure also possessed outstanding structural advantages, such as large surface area and hierarchical porous characters, enabling NiCo2O4@C BHNAs–NF to have excellent electrochemical performance. Its capacity can reach 1298 mAh/g at a current density of 100 mA/g, and 86% of the initial capacity can be retained after 100 cycles. All these results revealed that NiCo2O4@C BHNAs–NF was a promising candidate anode for next-generation LIBs.



中文翻译:

一步法制备碳包覆的NiCo 2 O 4 @C双层混合纳米结构阵列,作为高性能锂离子电池的独立式阳极

革命性的电动汽车的迅速发展导致对锂离子电池(LIB)的能量密度和循环寿命的要求增加。由于二元过渡金属氧化物NiCo 2 O 4的比容量比石墨大得多,因此备受关注。但是,由于NiCo 2 O 4在循环期间的体积变化较大,因此循环性能较差。为了解决这个问题,我们提出了一种简单的策略来制备在Ni泡沫(表示为NiCo 2 O 4)上负载的原位碳包覆NiCo 2 O 4双层混合纳米结构阵列。@C BHNAs–NF)通过蔗糖辅助水热法作为LIB的独立式阳极。原位合成的均匀碳壳可以同时缓冲循环过程中的体积变化并提高电导率。微/纳米结构还具有突出的结构优势,例如大表面积和分层多孔性,使NiCo 2 O 4 @C BHNAs–NF具有出色的电化学性能。在100 mA / g的电流密度下,其容量可以达到1298 mAh / g,并且在100次循环后可以保留86%的初始容量。所有这些结果表明,NiCo 2 O 4 @C BHNAs–NF是下一代LIB的有希望的候选阳极。

更新日期:2018-04-06
down
wechat
bug