Journal ArticleDOI
Synthesis and electrochemical properties of ZnO-coated LiNi0.5Mn1.5O4 spinel as 5 V cathode material for lithium secondary batteries
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ZnO-coated LiNi 0. 5 Mn 1. 5 O 4 powders with excellent electrochemical cyclability and structural stability at elevated temperature have been synthesized by a sol-gel method as mentioned in this paper.Abstract:
ZnO-coated LiNi 0 . 5 Mn 1 . 5 O 4 powders with excellent electrochemical cyclability and structural stability at elevated temperature have been synthesized by a sol-gel method. The structural degradation of the as-preparedLiNi 0 . 5 Mn 1 . 5 O 4 and ZnO-coated LiNi 0 . 5 Mn 1 . 5 O 4 electrodes before and after cycling in the 5 V region has been studied. The ZnO-coated LiNi 0 . 5 Mn 1 . 5 O 4 electrode showed almost no capacity loss and retained its original cubic spinel structure after 50 cycles. We found that ZnO played an important role in reducing the HF content in the electrolyte solution.read more
Citations
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Journal ArticleDOI
Challenges Facing Lithium Batteries and Electrical Double‐Layer Capacitors
Nam-Soon Choi,Zonghai Chen,Stefan Freunberger,Xiulei Ji,Yang-Kook Sun,Khalil Amine,Gleb Yushin,Linda F. Nazar,Jaephil Cho,Peter G. Bruce +9 more
TL;DR: The Review will consider some of the current scientific issues underpinning lithium batteries and electric double-layer capacitors.
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Before Li Ion Batteries
TL;DR: This Review covers a sequence of key discoveries and technical achievements that eventually led to the birth of the lithium-ion battery and sheds light on the history with the advantage of contemporary hindsight to aid in the ongoing quest for better batteries of the future.
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Nickel-Rich Layered Cathode Materials for Automotive Lithium-Ion Batteries: Achievements and Perspectives
Seung-Taek Myung,Filippo Maglia,Kang Joon Park,Chong Seung Yoon,Peter Lamp,Kim Sung-Jin,Yang-Kook Sun +6 more
TL;DR: In this paper, the potential and limitations of nickel-rich cathode materials are compared with reference to realistic target values from the automotive industry, and how future automotive targets can be achieved through fine control of the structural and microstructural properties.
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Nickel-Rich and Lithium-Rich Layered Oxide Cathodes: Progress and Perspectives
TL;DR: Li-rich layered oxides have attracted much research interest as cathodes for Li-ion batteries due to their low cost and higher discharge capacities compared to those of LiCoO2 and LiMn2O4 as mentioned in this paper.
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Materials for lithium-ion battery safety
TL;DR: This Review aims to summarize the fundamentals of the origins of LIB safety issues and highlight recent key progress in materials design to improve LIB safety, especially for emerging LIBs with high-energy density.
References
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Journal ArticleDOI
Lithium insertion into manganese spinels
TL;DR: In this article, Li has been inserted chemically and electrochemically into Mn3O4 and Li[Mn2]O4 at room temperature from X-ray diffraction.
Journal ArticleDOI
Capacity Fading on Cycling of 4 V Li / LiMn2 O 4 Cells
Abstract: The cycle-life behavior of a Li/1 M-LiPF 6 + EC/DMC(1:2 by volume)/LiMn 2 O 4 cell was investigated at various temperatures (0, 25, and 50°C). The capacity fades faster on cycling at high rather than low temperatures. The mechanisms responsible for the capacity fading of the spinel LiMn 2 O 4 during cycling were extensively investigated by chemical analysis of the dissolved Mn in combination with in situ x-ray diffraction, Rietveld analysis, and ac impedance techniques. Chemical analytical results indicated that the capacity loss caused by the simple dissolution of Mn 3+ accounted for only 23 and 34% of the overall capacity losses cycling at room temperature and 50°C, respectively. In situ x-ray diffraction results showed that the two-phase structure coexisting in the high-voltage region persists during lithium-ion insertion/extraction at low temperatures during cycling. By contrast, this two-phase structure was effectively transformed to a more stable, one-phase structure, accompanied by the dissolution of Mn and the loss of oxygen (e.g., Mn 2 O 3 .MnO) at the high temperature; this dominated the overall capacity-loss process. AC impedance spectra revealed that the capacity loss at the high temperature was also due in part to the decomposition of electrolyte solution at the electrode.
Journal ArticleDOI
Li Metal‐Free Rechargeable LiMn2 O 4 / Carbon Cells: Their Understanding and Optimization
TL;DR: In this paper, LiMn{sub 2}O{sub 4} as the positive electrode and carbon as the negative electrode were optimized as a function of various operating parameters.
Journal ArticleDOI
A new three-volt spinel Li{sub 1+x}Mn{sub 1.5}Ni{sub 0.5}O{sub 4} for secondary lithium batteries
TL;DR: The spinel LiMn{sub 1.5}Ni{sub 0.5]O{sub 4} has been prepared at low temperature using a new sol-gel process.
Journal ArticleDOI
Mechanism for Limited 55°C Storage Performance of Li1.05Mn1.95 O 4 Electrodes
A. Du Pasquier,A. Blyr,P. Courjal,Dominique Larcher,Glenn G. Amatucci,B. Gérand,J. M. Tarascon +6 more
TL;DR: In this article, a survey of the chemical stability of high surface area LiMn{sub 2}O{sub 4} in various Li-based electrolytes was performed as a function of temperature.