Amorphous vanadium oxide coating on graphene by atomic layer deposition for stable high energy lithium ion anodes

2014 ◽  
Vol 50 (73) ◽  
pp. 10703 ◽  
Author(s):  
Xiang Sun ◽  
Changgong Zhou ◽  
Ming Xie ◽  
Tao Hu ◽  
Hongtao Sun ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Vanadium Oxide ◽  
Lithium Ion ◽  
Oxide Coating ◽  
Atomic Layer ◽  
High Energy ◽  
Layer Deposition

scholarly journals Enhanced Cyclability of Cr8O21 Cathode for PEO-Based All-Solid-State Lithium-Ion Batteries by Atomic Layer Deposition of Al2O3

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5380
Author(s):  
Haichang Zhang ◽  
Zhibin Xu ◽  
Bin Shi ◽  
Fei Ding ◽  
Xingjiang Liu ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Solid State ◽  
Atomic Layer Deposition ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Atomic Layer ◽  
High Energy ◽  
High Energy Density ◽  
Al2o3 Layer ◽  
Layer Deposition

Cr8O21 can be used as the cathode material in all-solid-state batteries with high energy density due to its high reversible specific capacity and high potential plateau. However, the strong oxidation of Cr8O21 leads to poor compatibility with polymer-based solid electrolytes. Herein, to improve the cycle performance of the battery, Al2O3 atomic layer deposition (ALD) coating is applied on Cr8O21 cathodes to modify the interface between the electrode and the electrolyte. X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscope, and Fourier transform infrared spectroscopy, etc., are used to estimate the morphology of the ALD coating and the interface reaction mechanism. The electrochemical properties of the Cr8O21 cathodes are investigated. The results show that the uniform and dense Al2O3 layer not only prevents the polyethylene oxide from oxidization but also enhances the lithium-ion transport. The 12-ALD-cycle-coated electrode with approximately 4 nm Al2O3 layer displays the optimal cycling performance, which delivers a high capacity of 260 mAh g−1 for the 125th cycle at 0.1C with a discharge-specific energy of 630 Wh kg−1.

scholarly journals Atomic Layer Deposition of Ni-Co-O Thin-Film Electrodes for Solid-State LIBs and the Influence of Chemical Composition on Overcapacity

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 907
Author(s):  
Yury Koshtyal ◽  
Ilya Mitrofanov ◽  
Denis Nazarov ◽  
Oleg Medvedev ◽  
Artem Kim ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Atomic Layer Deposition ◽  
Nickel Oxide ◽  
Cobalt Oxide ◽  
Lithium Ion ◽  
Atomic Layer ◽  
Metallic Nickel ◽  
Uniform Density ◽  
Oxide Content ◽  
Layer Deposition

Nanostructured metal oxides (MOs) demonstrate good electrochemical properties and are regarded as promising anode materials for high-performance lithium-ion batteries (LIBs). The capacity of nickel-cobalt oxides-based materials is among the highest for binary transition metals oxide (TMOs). In the present paper, we report the investigation of Ni-Co-O (NCO) thin films obtained by atomic layer deposition (ALD) using nickel and cobalt metallocenes in a combination with oxygen plasma. The formation of NCO films with different ratios of Ni and Co was provided by ALD cycles leading to the formation of nickel oxide (a) and cobalt oxide (b) in one supercycle (linear combination of a and b cycles). The film thickness was set by the number of supercycles. The synthesized films had a uniform chemical composition over the depth with an admixture of metallic nickel and carbon up to 4 at.%. All samples were characterized by a single NixCo1-xO phase with a cubic face-centered lattice and a uniform density. The surface of the NCO films was uniform, with rare inclusions of nanoparticles 15–30 nm in diameter. The growth rates of all films on steel were higher than those on silicon substrates, and this difference increased with increasing cobalt concentration in the films. In this paper, we propose a method for processing cyclic voltammetry curves for revealing the influence of individual components (nickel oxide, cobalt oxide and solid electrolyte interface—SEI) on the electrochemical capacity. The initial capacity of NCO films was augmented with an increase of nickel oxide content.

Sign in / Sign up

Export Citation Format

Share Document