High-performance heterostructured cathodes for lithium-ion batteries with a Ni-rich layered oxide core and a Li-rich layered oxide shell
Abstract
The Ni-rich layered oxides with a Ni content of >0.5 are drawing much attention recently to increase the energy density of lithium-ion batteries. However, the Ni-rich layered oxides suffer from aggressive reaction of the cathode surface with the organic electrolyte at the higher operating voltages, resulting in consequent impedance rise and capacity fade. To overcome this difficulty, we present here a heterostructure composed of a Ni-rich LiNi0.7Co0.15Mn0.15O2 core and a Li-rich Li1.2-xNi0.2Mn0.6O2 shell, incorporating the advantageous features of the structural stability of the core and chemical stability of the shell. With a unique chemical treatment for the activation of the Li2MnO3 phase of the shell, a high capacity is realized with the Li-rich shell material. Aberration-corrected scanning transmission electron microscopy (STEM) provides direct evidence for the formation of surface Li-rich shell layer. Finally, the heterostructure exhibits a high capacity retention of 98% and a discharge- voltage retention of 97% during 100 cycles with a discharge capacity of 190 mA h g-1 (at 2.0–4.5 V under C/3 rate, 1C = 200 mA g-1).
- Authors:
-
- The Univ. of Texas, Austin, TX (United States)
- Ulsan National Institute of Science and Technology (UNIST), Ulsan (South Korea)
- Publication Date:
- Research Org.:
- Univ. of Texas, Austin, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1363894
- Grant/Contract Number:
- EE0006447
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Science
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 11; Journal ID: ISSN 2198-3844
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; chemical activation; heterostructure; lithium-rich layered oxide; nickel-rich layered oxide; surface stabilization
Citation Formats
Oh, Pilgun, Oh, Seung -Min, Li, Wangda, Myeong, Seunjun, Cho, Jaephil, and Manthiram, Arumugam. High-performance heterostructured cathodes for lithium-ion batteries with a Ni-rich layered oxide core and a Li-rich layered oxide shell. United States: N. p., 2016.
Web. doi:10.1002/advs.201600184.
Oh, Pilgun, Oh, Seung -Min, Li, Wangda, Myeong, Seunjun, Cho, Jaephil, & Manthiram, Arumugam. High-performance heterostructured cathodes for lithium-ion batteries with a Ni-rich layered oxide core and a Li-rich layered oxide shell. United States. https://doi.org/10.1002/advs.201600184
Oh, Pilgun, Oh, Seung -Min, Li, Wangda, Myeong, Seunjun, Cho, Jaephil, and Manthiram, Arumugam. Mon .
"High-performance heterostructured cathodes for lithium-ion batteries with a Ni-rich layered oxide core and a Li-rich layered oxide shell". United States. https://doi.org/10.1002/advs.201600184. https://www.osti.gov/servlets/purl/1363894.
@article{osti_1363894,
title = {High-performance heterostructured cathodes for lithium-ion batteries with a Ni-rich layered oxide core and a Li-rich layered oxide shell},
author = {Oh, Pilgun and Oh, Seung -Min and Li, Wangda and Myeong, Seunjun and Cho, Jaephil and Manthiram, Arumugam},
abstractNote = {The Ni-rich layered oxides with a Ni content of >0.5 are drawing much attention recently to increase the energy density of lithium-ion batteries. However, the Ni-rich layered oxides suffer from aggressive reaction of the cathode surface with the organic electrolyte at the higher operating voltages, resulting in consequent impedance rise and capacity fade. To overcome this difficulty, we present here a heterostructure composed of a Ni-rich LiNi0.7Co0.15Mn0.15O2 core and a Li-rich Li1.2-xNi0.2Mn0.6O2 shell, incorporating the advantageous features of the structural stability of the core and chemical stability of the shell. With a unique chemical treatment for the activation of the Li2MnO3 phase of the shell, a high capacity is realized with the Li-rich shell material. Aberration-corrected scanning transmission electron microscopy (STEM) provides direct evidence for the formation of surface Li-rich shell layer. Finally, the heterostructure exhibits a high capacity retention of 98% and a discharge- voltage retention of 97% during 100 cycles with a discharge capacity of 190 mA h g-1 (at 2.0–4.5 V under C/3 rate, 1C = 200 mA g-1).},
doi = {10.1002/advs.201600184},
journal = {Advanced Science},
number = 11,
volume = 3,
place = {United States},
year = {Mon May 30 00:00:00 EDT 2016},
month = {Mon May 30 00:00:00 EDT 2016}
}
Web of Science
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