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Improvement of the Cathode Electrolyte Interphase on P2-Na2/3Ni1/3Mn2/3O2 by Atomic Layer Deposition
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-07-27 00:00:00 , DOI: 10.1021/acsami.7b05326
Judith Alvarado 1 , Chuze Ma 1 , Shen Wang 1 , Kimberly Nguyen 1 , Moses Kodur 1 , Ying Shirley Meng 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-07-27 00:00:00 , DOI: 10.1021/acsami.7b05326
Judith Alvarado 1 , Chuze Ma 1 , Shen Wang 1 , Kimberly Nguyen 1 , Moses Kodur 1 , Ying Shirley Meng 1
Affiliation
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Atomic layer deposition (ALD) is a commonly used coating technique for lithium ion battery electrodes. Recently, it has been applied to sodium ion battery anode materials. ALD is known to improve the cycling performance, Coulombic efficiency of batteries, and maintain electrode integrity. Here, the electrochemical performance of uncoated P2-Na2/3Ni1/3Mn2/3O2 electrodes is compared to that of ALD-coated Al2O3 P2-Na2/3Ni1/3Mn2/3O2 electrodes. Given that ALD coatings are in the early stage of development for NIB cathode materials, little is known about how ALD coatings, in particular aluminum oxide (Al2O3), affect the electrode–electrolyte interface. Therefore, full characterizations of its effects are presented in this work. For the first time, X-ray photoelectron spectroscopy (XPS) is used to elucidate the cathode electrolyte interphase (CEI) on ALD-coated electrodes. It contains less carbonate species and more inorganic species, which allows for fast Na kinetics, resulting in significant increase in Coulombic efficiency and decrease in cathode impedance. The effectiveness of Al2O3 ALD coating is also surprisingly reflected in the enhanced mechanical stability of the particle which prevents particle exfoliation.
中文翻译：
原子层沉积改进P2-Na 2/3 Ni 1/3 Mn 2/3 O 2上阴极电解质相
原子层沉积（ALD）是锂离子电池电极常用的涂层技术。近来，它已被应用于钠离子电池负极材料。已知ALD可以改善循环性能，电池的库仑效率，并保持电极完整性。在此，将未涂覆的P2-Na 2/3 Ni 1/3 Mn 2/3 O 2电极的电化学性能与ALD涂覆的Al 2 O 3 P2-Na 2/3 Ni 1/3 Mn 2/3的电化学性能进行了比较。Ø 2电极。鉴于ALD涂层处于NIB阴极材料开发的早期阶段，人们对ALD涂层（特别是氧化铝（Al 2 O 3））如何影响电极-电解质界面的了解甚少。因此，在这项工作中将对其作用进行全面的描述。X射线光电子能谱（XPS）首次用于阐明ALD涂层电极上的阴极电解质中间相（CEI）。它包含较少的碳酸盐种类和更多的无机种类，可实现快速的Na动力学，从而导致库仑效率显着提高和阴极阻抗降低。Al 2 O 3的有效性 ALD涂层还令人惊讶地反映在防止颗粒剥落的增强的颗粒机械稳定性上。
更新日期：2017-07-28
中文翻译：
原子层沉积改进P2-Na 2/3 Ni 1/3 Mn 2/3 O 2上阴极电解质相
原子层沉积（ALD）是锂离子电池电极常用的涂层技术。近来，它已被应用于钠离子电池负极材料。已知ALD可以改善循环性能，电池的库仑效率，并保持电极完整性。在此，将未涂覆的P2-Na 2/3 Ni 1/3 Mn 2/3 O 2电极的电化学性能与ALD涂覆的Al 2 O 3 P2-Na 2/3 Ni 1/3 Mn 2/3的电化学性能进行了比较。Ø 2电极。鉴于ALD涂层处于NIB阴极材料开发的早期阶段，人们对ALD涂层（特别是氧化铝（Al 2 O 3））如何影响电极-电解质界面的了解甚少。因此，在这项工作中将对其作用进行全面的描述。X射线光电子能谱（XPS）首次用于阐明ALD涂层电极上的阴极电解质中间相（CEI）。它包含较少的碳酸盐种类和更多的无机种类，可实现快速的Na动力学，从而导致库仑效率显着提高和阴极阻抗降低。Al 2 O 3的有效性 ALD涂层还令人惊讶地反映在防止颗粒剥落的增强的颗粒机械稳定性上。
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