Lithium-ion conductive coating layer on nickel rich layered oxide cathode material with improved electrochemical properties for Li-ion battery

Carbon nano-coated LiNi 0.8 Co 0.15 Al 0.05 O 2/ C (LNCAO/C) cathode-active materials were prepared by a sol–gel method and investigated as the cathode material for lithium ion batteries. Electrochemical properties including the galvanostatic charge–discharge ability and cyclic voltammogram behavior were measured. Cyclic voltammetry (2.7–4.8 V) showed that the carbon nano-coating improved the "formation" of the LNCAO electrode, which was related to the increased electronic conductivity between the primary particles. The carbon nano-coated LNCAO/C exhibited good electrochemical performance at high C -rate. Also, the thermal stability at a highly oxidized state of the carbon nano-coated LNCAO was remarkably enhanced. The carbon nano-coating layer can serve as a physical and/or (electro-)chemical protection shell for the underlying LNCAO, which is attributed to an increase of the grain connectivity (physical part) and also to the protection of metal oxide from chemical reactions (chemical part).

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Improvement of electrochemical performance of LiNi0.8Co0.1Mn0.1O2 cathode material via Li2.09W0.9Nb0.1O4 Li-ion conductive coating layer

Journal of Solid State Electrochemistry ◽

10.1007/s10008-020-04742-8 ◽

2020 ◽

Vol 24 (10) ◽

pp. 2301-2313

Author(s):

Xinghan Zhang ◽

Fei Ma ◽

Guangye Wei ◽

Ze Lei ◽

Jingkui Qu

Keyword(s):

Electrochemical Performance ◽

Cathode Material ◽

Coating Layer ◽

Conductive Coating ◽

Li Ion

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Investigation of Interfacial Phenomena of High-Voltage Li-Ion Battery with Li-Rich Layered Oxide Cathode

ECS Meeting Abstracts ◽

10.1149/ma2016-02/2/219 ◽

2016 ◽

Keyword(s):

High Voltage ◽

Interfacial Phenomena ◽

Li Ion Battery ◽

Layered Oxide ◽

Oxide Cathode ◽

Li Ion

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Electrochemical Properties of Zr4+ Doped LiFePO4 cathode Material for Li-Ion Battery

ECS Meeting Abstracts ◽

10.1149/ma2019-01/2/198 ◽

2019 ◽

Keyword(s):

Cathode Material ◽

Electrochemical Properties ◽

Li Ion Battery ◽

Lifepo4 Cathode ◽

Li Ion

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Effect of Different Composition on Voltage Attenuation of Li-Rich Cathode Material for Lithium-Ion Batteries

Materials ◽

10.3390/ma13010040 ◽

2019 ◽

Vol 13 (1) ◽

pp. 40 ◽

Cited By ~ 8

Author(s):

Jun Liu ◽

Qiming Liu ◽

Huali Zhu ◽

Feng Lin ◽

Yan Ji ◽

...

Keyword(s):

Cathode Material ◽

Lithium Ion Batteries ◽

Cathode Materials ◽

Nickel Content ◽

Lithium Ion ◽

Commercial Application ◽

Operating Voltage ◽

Layered Oxide ◽

Oxide Cathode ◽

Voltage Attenuation

Li-rich layered oxide cathode materials have become one of the most promising cathode materials for high specific energy lithium-ion batteries owning to its high theoretical specific capacity, low cost, high operating voltage and environmental friendliness. Yet they suffer from severe capacity and voltage attenuation during prolong cycling, which blocks their commercial application. To clarify these causes, we synthesize Li1.5Mn0.55Ni0.4Co0.05O2.5 (Li1.2Mn0.44Ni0.32Co0.04O2) with high-nickel-content cathode material by a solid-sate complexation method, and it manifests a lot slower capacity and voltage attenuation during prolong cycling compared to Li1.5Mn0.66Ni0.17Co0.17O2.5 (Li1.2Mn0.54Ni0.13Co0.13O2) and Li1.5Mn0.65Ni0.25Co0.1O2.5 (Li1.2Mn0.52Ni0.2Co0.08O2) cathode materials. The capacity retention at 1 C after 100 cycles reaches to 87.5% and the voltage attenuation after 100 cycles is only 0.460 V. Combining X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscopy (TEM), it indicates that increasing the nickel content not only stabilizes the structure but also alleviates the attenuation of capacity and voltage. Therefore, it provides a new idea for designing of Li-rich layered oxide cathode materials that suppress voltage and capacity attenuation.

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Improving the electrochemical performance of the LiNi0.5Mn1.5O4spinel by polypyrrole coating as a cathode material for the lithium-ion battery

Journal of Materials Chemistry A ◽

10.1039/c4ta04018j ◽

2015 ◽

Vol 3 (1) ◽

pp. 404-411 ◽

Cited By ~ 83

Author(s):

Xuan-Wen Gao ◽

Yuan-Fu Deng ◽

David Wexler ◽

Guo-Hua Chen ◽

Shu-Lei Chou ◽

...

Keyword(s):

Elevated Temperature ◽

Electrochemical Performance ◽

Cathode Material ◽

Electrochemical Properties ◽

Lithium Ion Battery ◽

Cathode Materials ◽

Lithium Ion ◽

Li Ion Batteries ◽

Li Ion ◽

Conductive Polypyrrole

Conductive polypyrrole (PPy)-coated LiNi0.5Mn1.5O4(LNMO) composites are applied as cathode materials in Li-ion batteries, and their electrochemical properties are explored at both room and elevated temperature.

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