The DOI matches its Crossref record; 12 of the 12 references it cites were found in a registry or an index.
Investigation of Changes in the Surface Structure of LixNi0.8Co0.15Al0.05O2 Cathode Materials Induced by the Initial Charge
Abstract
We use transmission electron microscopy (TEM) to investigate the evolution of the surface structure of Li x Ni 0.8 Co 0.15 Al 0.05 O 2 cathode materials (NCA) as a function of the extent of first charge at room temperature using a combination of high-resolution electron microscopy (HREM) imaging, selected area electron diffraction (SAED), and electron energy loss spectroscopy (EELS). It was found that the surface changes from the layered structure (space group R 3̅ m ) to the disordered spinel structure ( Fd 3̅ m ), and eventually to the rock-salt structure ( Fm 3̅ m ), and that these changes are more substantial as the extent of charge increases. EELS indicates that these crystal structure changes are also accompanied by significant changes in the electronic structure, which are consistent with delithiation leading to both a reduction of the Ni and an increase in the effective electron density of oxygen. This leads to a charge imbalance, which results in the formation of oxygen vacancies and the development of surface porosity. The degree of local surface structure change differs among particles, likely due to kinetic factors that are manifested with changes in particle size. These results demonstrate that TEM, when coupled with EELS, can provide detailed information about the crystallographic and electronic structure changes that occur at the surface of these materials during delithiation. This information is of critical importance for obtaining a complete understanding of the mechanisms by which both degradation and thermal runaway initiate in these electrode materials.
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Self-citationBak, S.-M., Nam, K.-W., Chang, W., Yu, X., Hu, E., Hwang, S., Stach, E. A., Kim, K.-B., Chung, K. Y., & Yang, X.-Q. (2013) · Chemistry of Materials · doi:10.1021/cm303096e · Cited by 390
Self-citationA First-Principles Approach to Studying the Thermal Stability of Oxide Cathode Materials
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Cited by
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Electrode–electrolyte interfaces in lithium-based batteries
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In Situ STEM-EELS Observation of Nanoscale Interfacial Phenomena in All-Solid-State Batteries
Wang, Z., Santhanagopalan, D., Zhang, W., Wang, F., Xin, H. L., He, K., Li, J., Dudney, N., & Meng, Y. S. (2016) · Nano Letters · doi:10.1021/acs.nanolett.6b01119 · Cited by 384
Charge-Transfer-Induced Lattice Collapse in Ni-Rich NCM Cathode Materials during Delithiation
Kondrakov, A. O., Geßwein, H., Galdina, K., de Biasi, L., Meded, V., Filatova, E. O., Schumacher, G., Wenzel, W., Hartmann, P., Brezesinski, T., et al. (2017) · The Journal of Physical Chemistry C · doi:10.1021/acs.jpcc.7b06598 · Cited by 367
Metadata
- Authors
- Hwang, S., Chang, W., Kim, S. M., Su, D., Kim, D. H., Lee, J. Y., Chung, K. Y., & Stach, E. A.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-01-15
- Volume
- 26
- Issue
- 2
- Pages
- 1084-1092
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2322657253
- Cited by
- 346
- References
- 12
- FWCI
- 16.80
- Type
- journal article
- Language
- en
- Open access
- closed
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- Hwang, S., Chang, W., Kim, S. M., Su, D., Kim, D. H., Lee, J. Y., Chung, K. Y., & Stach, E. A. (2014). Investigation of Changes in the Surface Structure of LixNi0.8Co0.15Al0.05O2 Cathode Materials Induced by the Initial Charge. Chemistry of Materials. https://doi.org/10.1021/cm403332s
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