Performance improvement of Li-rich layer-structured Li _1.2 Mn _0.54 Ni _0.13 Co _0.13 O ₂ by integration with spinel LiNi _0.5 Mn _1.5 O ₄

Journal Article · Thu Jan 01 00:00:00 EST 2015 · Physical Chemistry Chemical Physics. PCCP (Print)

DOI:https://doi.org/10.1039/c4cp04087b· OSTI ID:1247156

Feng, Xin ^[1]; Yang, Zhenzhong ^[1]; Tang, Daichun ^[1]; Kong, Qingyu ^[2]; Gu, Lin ^[1]; Wang, Zhaoxiang ^[1]; Chen, Liquan ^[1]

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1. Chinese Academy of Sciences (CAS), Beijing (China)
2. Argonne National Lab. (ANL), Argonne, IL (United States)

Li-rich layered Li_1+xMnyM_1-x-yO₂ (or denoted xLi₂MnO₃center dot_1-xLiMO₂, M = Ni, Co, Mn, etc.) are promising cathode materials for high energy-density Li-ion batteries. However, their commercial applications suffer from problems such as a drop in the capacity and discharge voltage during cycling. In this work, the cycling performance of a layered oxide Li_1.2Ni_0.13Co_0.13Mn_0.54O₂ is improved by integration with spinel LiNi_0.5Mn_1.5O₄ to obtain a layered-spinel composite. Characterization by powder X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) as well as cyclic voltammetry (CV) indicates that delayed degradation of layered Li₂MnO₃ and the suppressed growth of LiMn₂O₄-like spinel are responsible for the performance improvement.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: National Natural Science Foundation of China (NNSFC)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1247156
• Journal Information: Physical Chemistry Chemical Physics. PCCP (Print), Vol. 17, Issue 2; ISSN 1463-9076
• Publisher: Royal Society of Chemistry
• Country of Publication: United States
• Language: English

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36 MATERIALS SCIENCE