Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 20, 2020
Previous Article Next Article

Hierarchical Li-rich oxide microspheres assembled from {010} exposed primary grains for high-rate lithium-ion batteries

Author affiliations

Abstract

Layered Li-rich oxides (LLOs) with high capacity exceeding 300 mA h g−1 and low cost are regarded as the most promising candidates for high energy-density (500 W h kg−1) lithium-ion batteries. However, they usually present sluggish Li+ kinetics and low tap-density, resulting in poor rate capability and volumetric energy density. Here, the wide particle size distribution of LLO microspheres assembled from {010} exposed primary grains is rationally proposed to solve the above-mentioned issues. A high specific capability of ∼295 mA h g−1 at 0.1C and superior cycling stability (capacity retention of 90.6% after 100 cycles) are achieved. The close stacking caused by the coexistence of large and small secondary particles gives rise to a high tap-density of 2.26 g cm−3, corresponding to a high volumetric energy density of above 2350 W h L−1. The TEM results confirm that the lateral direction nanosheets belong to the electrochemically active {010} planes, which further results in the improved Li+ kinetics during redox. As a result, an excellent high-rate capability of 110 mA h g−1 is achieved even at 20C. The GITT tests elucidate that the active {010} exposed planes exhibit superior Li+ diffusion kinetics during charge and discharge processes. This feasible strategy can be expanded to enhancing the Li+ kinetics of other NCM-based layered cathodes for alkali rechargeable batteries.

Graphical abstract: Hierarchical Li-rich oxide microspheres assembled from {010} exposed primary grains for high-rate lithium-ion batteries

Back to tab navigation

Article information


Submitted
16 Jan 2020
Accepted
24 Apr 2020
First published
27 Apr 2020

New J. Chem., 2020,44, 8486-8493
Article type
Paper

Hierarchical Li-rich oxide microspheres assembled from {010} exposed primary grains for high-rate lithium-ion batteries

Z. Zi, Y. Zhang, Y. Meng, G. Gao and P. Hou, New J. Chem., 2020, 44, 8486
DOI: 10.1039/D0NJ00274G

Social activity

Search articles by author

Spotlight

Advertisements