Two‐Dimensional NiO@C‐N Nanosheets Composite as a Superior Low‐Temperature Anode Material for Advanced Lithium‐/Sodium‐Ion Batteries,ChemElectroChem

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Two‐Dimensional NiO@C‐N Nanosheets Composite as a Superior Low‐Temperature Anode Material for Advanced Lithium‐/Sodium‐Ion Batteries
ChemElectroChem ( IF 3.5 ) Pub Date : 2020-06-18 , DOI: 10.1002/celc.202000747
Zhengyu Bai ₁ , Xiao Lv ₁ , Dai‐Huo Liu ₁ , Dongmei Dai ₁ , Jiali Gu ₁ , Lin Yang ₁ , Zhongwei Chen ₂

Affiliation

Most of the anodes used in lithium‐/sodium‐ion batteries (LIBs/SIBs) have poor low‐temperature (LT) performances, which severely limit their applications under LT environment. Herein, two‐dimensional nickel oxide nanosheet encapsulated in N‐doped carbon coated layer (abbreviated as NiO@C−N NSs) is successfully prepared and investigated for the first time as a LT anode for LIBs/SIBs. As a result, the prepared NiO@C−N NSs electrode delivers a high room temperature (RT) Li‐storage capacity (1036 mA h g⁻¹ at 0.05 A g⁻¹) and excellent LT Li‐storage performance (428 mA h g⁻¹ at 0.05 A g⁻¹ at −40 °C). Furthermore, the prepared NiO@C−N NSs also exhibits a superior RT Na‐storage capacity of 529 mA h g⁻¹ at 0.05 A g⁻¹ and superior LT Na‐storage performance. Through electrochemical impedance spectroscopy analysis, we find that the LT Li‐/Na‐storage performances of NiO@C−N NSs electrodes are mainly dominated by the R_SEI of SEI membrane formation at the electrode/electrolyte interface. Moreover, the LT Li‐/Na‐storage properties of NiO@C−N NSs can be effectively improved by using commercial LT electrolyte with low viscosity and low melting point.

中文翻译：

二维NiO @ C-N纳米片复合材料，是用于高级锂/钠离子电池的卓越的低温阳极材料

锂/钠离子电池（LIB / SIB）中使用的大多数阳极的低温（LT）性能都很差，这严重限制了它们在LT环境下的应用。在此，成功地制备了封装在N掺杂碳涂层（简称为NiO @ C-N NSs）中的二维氧化镍纳米片，并首次将其用作LIB / SIB的LT阳极。其结果是，所制得的NiO @ C-N奈米球电极提供高的室温（RT）的锂存储容量（1036毫安ħ克^-1 0.05 A G ^-1）和优异的LT锂存储性能（428毫安ħ克^{- 1}在-40°C时为0.05 A g ^-1）。此外，所制备的NiO @ C-N NSs在0.05 A g的条件下还具有529 mA h g ^-1的优异的RT Na存储容量。^-1和出色的LT Na存储性能。通过电化学阻抗谱分析，我们发现NiO @ C-N NSs电极的LT Li- / Na储存性能主要受电极/电解质界面处SEI膜形成的R _SEI支配。此外，通过使用低粘度和低熔点的市售LT电解质，可以有效地改善NiO @ C-N NSs的LT Li / Na储存性能。

更新日期：2020-06-18

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