In situ nano-coating on LiMnNiCoO with a layered@spinel@coating layer heterostructure for lithium-ion batteries
Journal of Materials Chemistry A, ISSN: 2050-7496, Vol: 3, Issue: 42, Page: 21290-21297
2015
- 26Citations
- 20Captures
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Article Description
Lithium-rich manganese-based layered oxides with a composition of xLiMnO·(1 - x)LiMO (M = Mn, Co, Ni, etc.) are attractive, due to their high discharge capacity. However, the concerns over LiMnO-LiMO composite cathodes such as high irreversible capacity and poor rate performance remain to be the main obstacles to commercialization. Here we introduce a thin chromium oxide layer and a spinel metal oxide layer to doubly coat on the surface of LiMnNiCoO (LMNCO) by a spray drying process as well as an inducer of the layered@spinel@coating layer heterostructure to achieve better electrochemical performance. X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HR-TEM) results confirm the successful formation of a chromium oxide layer on the surface of LMNCO without destroying its intrinsic structure. The reduced irreversible capacity loss and improved cycling stability are ascribed to the coating layer and the heterostructure. Furthermore, fast voltage fading of the solid solutions of layered transition metal oxides is also alleviated.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84945273030&origin=inward; http://dx.doi.org/10.1039/c5ta06387f; http://xlink.rsc.org/?DOI=C5TA06387F; http://pubs.rsc.org/en/content/articlepdf/2015/TA/C5TA06387F; https://xlink.rsc.org/?DOI=C5TA06387F; https://dx.doi.org/10.1039/c5ta06387f; https://pubs.rsc.org/en/content/articlelanding/2015/ta/c5ta06387f
Royal Society of Chemistry (RSC)
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