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| Hauptseite > Publikationsdatenbank > Tuning Li-enrichment in high-Ni layered oxide cathodes to optimize electrochemical performance for Li-ion battery > print |
| Hauptseite > Publikationsdatenbank > Tuning Li-enrichment in high-Ni layered oxide cathodes to optimize electrochemical performance for Li-ion battery > print |
| 001 | 875384 | ||
| 005 | 20210130004926.0 | ||
| 024 | 7 | _ | |a 10.1016/j.nanoen.2019.05.089 |2 doi |
| 024 | 7 | _ | |a 2211-2855 |2 ISSN |
| 024 | 7 | _ | |a 2211-3282 |2 ISSN |
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| 037 | _ | _ | |a FZJ-2020-01995 |
| 082 | _ | _ | |a 660 |
| 100 | 1 | _ | |a Wang, Rui |0 P:(DE-Juel1)161485 |b 0 |
| 245 | _ | _ | |a Tuning Li-enrichment in high-Ni layered oxide cathodes to optimize electrochemical performance for Li-ion battery |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2019 |b Elsevier |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a To understand what and how structural properties affect battery performance, and to optimize the structural properties accordingly are of crucial importance to improve the performance of cathode materials for advanced Li-ion batteries. Herein, we investigated the influence of Li-enrichment in Li1+x(Ni0.8Co0.2)1-xO2 transition metal (TM) oxide cathodes, obtained by sintering Ni0.8Co0.2(OH)2 precursor with different amount of Li sources. Compared with stoichiometric Li1+x(Ni0.8Co0.2)1-xO2 (i.e. x = 0, Li:TM = 1:1), the improvements of cycling stability and rate performance were observed in material with moderate degree of Li-enrichment with respect to TMs (i.e. x = 0.019, Li:TM = 1.04:1). Further increase in Li:TM ratio up to 1.07 diminishes the electrochemical performance. Multi-scale structural characterizations including neutron diffraction and aberration-corrected transmission electron microscopy measurements show that the Li-enrichment leads to a monotonical increase in both Li/Ni exchange ratio and Li slab space. Based on the results, we argue that, in material with moderate Li-enrichment, larger Li slab space can facilitate the diffusion of Li ions and a certain amount of Li/Ni disordering can also mitigate the contraction of layered structure, therefore resulting in an optimized electrochemical performance; while in material with excessive Li:TM ratio, the diffusion path can be partially blocked due to the presence of redundant Ni ions in Li layers. |
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| 700 | 1 | _ | |a Xiao, Yinguo |0 P:(DE-Juel1)131047 |b 15 |
| 700 | 1 | _ | |a Pan, Feng |0 P:(DE-HGF)0 |b 16 |e Corresponding author |
| 773 | _ | _ | |a 10.1016/j.nanoen.2019.05.089 |g Vol. 62, p. 709 - 717 |0 PERI:(DE-600)2648700-7 |p 709 - 717 |t Nano energy |v 62 |y 2019 |x 2211-2855 |
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