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Improved rate performance of LiNi0.5Mn1.5O4 as cathode of lithium-ion battery by Li0.33La0.56TiO3 coating.

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Title: Improved rate performance of LiNi0.5Mn1.5O4 as cathode of lithium-ion battery by Li0.33La0.56TiO3 coating.
Authors: Zhu, Yan-Rong1, Yi, Ting-Feng1 tfyihit@163.com, Li, Xiao-Ya1, Xie, Ying1 xieying@hlju.edu.cn, Luo, Shaohua1 tianyanglsh@163.com
Source: Materials Letters. Mar2019, Vol. 239, p56-58. 3p.
Subjects: Lithium-ion batteries, Cathodes, Nickel compounds, Metal coating, Sol-gel processes
Abstract: Graphical abstract Highlights • The electrochemical property of LNMO@LLTO cathode is first reported. • Prominent rate capability of LNMO@LLTO is demonstrated. • The mechanism of performance improvement is analyzed in detail. Abstract Pristine LiNi 0.5 Mn 1.5 O 4 (LNMO) and LNMO@LLTO (Li 0.33 La 0.56 TiO 3) composites were synthesized by a sol-gel process. The lattice constant of LNMO increases with the increasing coated content of LLTO. All samples show irregular morphologies, and the particle size distributes uniformly between 200 and 500 nm. The inherent characteristic of Li 0.33 La 0.56 TiO 3 with a large ionic conductivity decreases the interfacial charge transfer impedances, leading to an enhanced migration rate of Li-ions in the composite. As a cathode of LIBs, LNMO@LLTO (3 wt%) exhibits a large reversible capacity and a remarkable rate capability. Therefore, Li 0.33 La 0.56 TiO 3 modification can be considered as an effective strategy to improve the rate capability of LNMO. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Graphical abstract Highlights • The electrochemical property of LNMO@LLTO cathode is first reported. • Prominent rate capability of LNMO@LLTO is demonstrated. • The mechanism of performance improvement is analyzed in detail. Abstract Pristine LiNi 0.5 Mn 1.5 O 4 (LNMO) and LNMO@LLTO (Li 0.33 La 0.56 TiO 3) composites were synthesized by a sol-gel process. The lattice constant of LNMO increases with the increasing coated content of LLTO. All samples show irregular morphologies, and the particle size distributes uniformly between 200 and 500 nm. The inherent characteristic of Li 0.33 La 0.56 TiO 3 with a large ionic conductivity decreases the interfacial charge transfer impedances, leading to an enhanced migration rate of Li-ions in the composite. As a cathode of LIBs, LNMO@LLTO (3 wt%) exhibits a large reversible capacity and a remarkable rate capability. Therefore, Li 0.33 La 0.56 TiO 3 modification can be considered as an effective strategy to improve the rate capability of LNMO. [ABSTRACT FROM AUTHOR]
ISSN:0167577X
DOI:10.1016/j.matlet.2018.12.070