Surface Passivation of MoO3 Nanorods by Atomic Layer Deposition Towards High Rate Durable Li Ion Battery Anodes
Nagaraju, Doddahalli H.
Anjum, Dalaver H.
Hedhili, Mohamed N.
Alshareef, Husam N.
KAUST DepartmentMaterials Science and Engineering Program
Permanent link to this recordhttp://hdl.handle.net/10754/556674
MetadataShow full item record
AbstractWe demonstrate an effective strategy to overcome the degradation of MoO3 nanorod anodes in Lithium (Li) ion batteries at high rate cycling. This is achieved by conformal nanoscale surface passivation of the MoO3 nanorods by HfO2 using atomic layer deposition (ALD). At high current density such as 1500 mA/g, the specific capacity of HfO2 coated MoO3 electrodes is 68% higher than bare MoO3 electrodes after 50 charge/discharge cycles. After 50 charge/discharge cycles, HfO2 coated MoO3 electrodes exhibited specific capacity of 657 mAh/g, on the other hand, bare MoO3 showed only 460 mAh/g. Furthermore, we observed that HfO2 coated MoO3 electrodes tend to stabilize faster than bare MoO3 electrodes because nanoscale HfO2 layer prevents structural degradation of MoO3 nanorods. Additionally, the growth temperature of MoO3 nanorods and the effect of HfO2 layer thickness was studied and found to be important parameters for optimum battery performance. The growth temperature defines the microstructural features and HfO2 layer thickness defines the diffusion coefficient of Li–ions through the passivation layer to the active material. Furthermore, ex–situ HRTEM, X–ray photoelectron spectroscopy (XPS), Raman spectroscopy and X–ray diffraction was carried out to explain the capacity retention mechanism after HfO2 coating.
CitationSurface Passivation of MoO3 Nanorods by Atomic Layer Deposition Towards High Rate Durable Li Ion Battery Anodes 2015:150603155633004 ACS Applied Materials & Interfaces
PublisherAmerican Chemical Society (ACS)
- Mechanistic Insight into the Stability of HfO2 -Coated MoS2 Nanosheet Anodes for Sodium Ion Batteries.
- Authors: Ahmed B, Anjum DH, Hedhili MN, Alshareef HN
- Issue date: 2015 Sep 9
- SnO2 anode surface passivation by atomic layer deposited HfO2 improves Li-ion battery performance.
- Authors: Yesibolati N, Shahid M, Chen W, Hedhili MN, Reuter MC, Ross FM, Alshareef HN
- Issue date: 2014 Jul 23
- Stabilizing Nanosized Si Anodes with the Synergetic Usage of Atomic Layer Deposition and Electrolyte Additives for Li-Ion Batteries.
- Authors: Hy S, Chen YH, Cheng HM, Pan CJ, Cheng JH, Rick J, Hwang BJ
- Issue date: 2015 Jul 1
- Core-shell α-Fe₂O₃@α-MoO₃ nanorods as lithium-ion battery anodes with extremely high capacity and cyclability.
- Authors: Wang Q, Wang Q, Zhang DA, Sun J, Xing LL, Xue XY
- Issue date: 2014 Nov
- Carbon-coated ZnO mat passivation by atomic-layer-deposited HfO<sub>2</sub> as an anode material for lithium-ion batteries.
- Authors: Jung MH
- Issue date: 2017 Nov 1