Journal Article

FZJ-2020-02590

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A highly stabilized Ni-rich NCA cathode for high-energy lithium-ion batteries

Ryu, H.-H. ; Park, N.-Y. ; Seo, J. H. ; Yu, Y.-S. ; Sharma, M. ; Mücke, R.FZJ* ; Kaghazchi, P. (Corresponding author)FZJ* ; Yoon, C. S. (Corresponding author) ; Sun, Y.-K. (Corresponding author)

2020
Elsevier Science Amsterdam [u.a.]

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/26219  doi:10.1016/j.mattod.2020.01.019

Abstract: In this study, we have demonstrated that boron doping of Ni-rich Li[NixCoyAl1−x−y]O2 dramatically alters the microstructure of the material. Li[Ni0.885Co0.1Al0.015]O2 is composed of large equiaxed primary particles, whereas a boron-doped Li[Ni0.878Co0.097Al0.015B0.01]O2 cathode consists of elongated particles that are highly oriented to produce a strong, crystallographic texture. Boron reduces the surface energy of the (0 0 3) planes, resulting in a preferential growth mode that maximizes the (0 0 3) facet. This microstructure modification greatly improves the cycling stability; the Li[Ni0.878Co0.097Al0.015B0.01]O2 cathode maintains a remarkable 83% of the initial capacity after 1000 cycles even when it is cycled at 100% depth of discharge. By contrast, the Li[Ni0.885Co0.1Al0.015]O2 cathode retains only 49% of its initial capacity. The superior cycling stability clearly indicates the importance of the particle microstructure (i.e., particle size, particle shape, and crystallographic orientation) in mitigating the abrupt internal strain caused by phase transitions in the deeply charged state, which occurs in all Ni-rich layered cathodes. Microstructure engineering by surface energy modification, when combined with protective coatings and composition modification, may provide a long-sought method of harnessing the high capacity of Ni-rich layered cathodes without sacrificing the cycling stability.

---

Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)

Research Program(s):

1. 131 - Electrochemical Storage (POF3-131) (POF3-131)

Appears in the scientific report 2020

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 20 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---