A simple and effective strategy to synthesize Al2O3-coated LiNi0.8Co0.2O2 cathode materials for lithium ion battery

Xiang, Jun; Chang, Caixian; Yuan, Liangjie; Sun, Jutang

doi:10.1016/j.elecom.2008.07.012

Cited by 61 publications

(27 citation statements)

References 16 publications

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“…Many strategies target Al 2 O 3 , LiFePO 4 , and LiNiPO 4 coatings on layered and spinel cathode materials. [25][26][27][28][29][30][31][32] Other strategies target MgO and ZnO coatings on spinel cathode materials. 72,73 Some of these studies do discuss reactivity of the targeted coating phases with the cathode materials during heat-treatment.…”

Section: Resultsmentioning

confidence: 99%

“…[13][14][15][16][17][18][19] Surface coatings can perform a variety of functions for different cathode materials. [20][21][22][23][24][25][26][27][28][29][30][31][32] In this work, we evaluate the ability of coating materials to contain TMs in the cathode and thereby prevent TM dissolution into the electrolyte.To evaluate a coating material for TM containment, we use two criteria: 1) A coating material should exhibit low TM solubility. If a coating exhibits high TM solubility, then TMs can be present in the coating near the particle surface, where they are susceptible to dissolution into the electrolyte.…”

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confidence: 99%

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Lithium-Ion Cathode/Coating Pairs for Transition Metal Containment

Snydacker

Aykol

Kirklin

et al. 2016

J. Electrochem. Soc.

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For many lithium-ion cathode materials, transition metal (TM) dissolution into the electrolyte contributes to cell degradation. Cathode coatings can limit TM dissolution by containing TMs in cathode materials. We perform density functional theory calculations to evaluate cathode/coating pairs for TM containment, specifically focusing on reactive stability of coating/cathode pairs as well as TM solubility in the coating materials. We consider stability and containment of materials at both synthesis and operating conditions. We find that many cathode/coating pairs are reactive when lithiated, while other cathode-coating pairs are stable when lithiated but become reactive following delithiation. Of all the coatings that we considered, Li 3 PO 4 occupies a unique chemical position, in that its coatings on oxide cathode materials maintained equilibrium under both lithiated and delithiated conditions. Furthermore, for oxide cathode materials, the Li 3 PO 4 coatings exhibit low TM solubilities across all cathode states of charge. Our results demonstrate that Li 3 PO 4 is a promising candidate for stable coatings on oxide cathode materials to limit TM dissolution into the electrolyte. Li-ion batteries are the dominant power sources in consumer electronics, and they are emerging as cost-competitive players in lowcarbon electricity systems and vehicles. However, many technologies are encumbered by the limited durability of today's Li-ion cells. For these applications, battery manufacturers have an incentive to improve cell durability. Transition metal (TM) dissolution from the cathode is a major contributor to cell degradation during cycling and aging.1 TM dissolution from the cathode contributes directly to capacity loss by decreasing the amount of cathode material. Furthermore, TMs that dissolve from the cathode material can migrate through the electrolyte to the anode, where they can cause changes to the anode Solid Electrolyte Interphase (SEI).2,3 These changes to the SEI increase impedance, decrease cell capacity, and decrease lifespan.A variety of strategies have been used to limit degradation by TMs. Electrolyte additives have been used to control SEI formation and limit the impact of TMs in the electrolyte. 4,5 Molecules have been attached to the polymer separator to sequester TMs from the electrolyte before they reach the anode. 6 In this work, we consider upstream strategies that limit TM dissolution from the cathode into the electrolyte. These upstream strategies are complementary to other strategies, including SEI formation and TM sequestration. There are several distinct categories of strategies for limiting TM dissolution from the cathode. Electrolytes can be tailored to reduce reactivity with the cathode. 7-9Cathode materials can be doped to control the oxidation states of transition metals. 10,11 This doping can be applied to the entire cathode particle or just near the surface.12 Cathode materials can also be covered with surface coatings to limit TM dissolution. [13][14][15][16][17][18][19] Surface coati...

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Lithium-Ion Cathode/Coating Pairs for Transition Metal Containment

Snydacker

Aykol

Kirklin

et al. 2016

J. Electrochem. Soc.

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show abstract

“…To solve these problems, various approaches including structure tuning [34][35][36], substitution [37][38][39], and surface coating [40][41][42][43][44][45] have been proposed. Metal oxides such as Al 2 O 3 [46,47], ZrO 2 [48], MgO [49], have been studied as coating materials. The metal oxide layer is beneficial to protecting the cathode materials from being exposed to electrolyte directly, and thus reducing the side reactions.…”

Section: Introductionmentioning

confidence: 99%

An Ostwald ripening route towards Ni-rich layered cathode material with cobalt-rich surface for lithium ion battery

Wang

et al. 2017

Sci. China Mater.

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“…Some researchers have addressed the energy capacity of the cathode and have tried to improve it using LiNiO 2 [6], Li Ni 0.8 Co 0.2 O 2 [7], LiNi 1/3 Mn 1/3 Co 1/3 O 2 [8,9], or LiNi 0.5 Mn 0.5 O 2 [10]. These materials consist of a layered structure, similar to the original LiCoO 2 .…”

Section: Cathode Materialsmentioning

confidence: 99%

The Current Situation and Problems of Rechargeable Lithium Ion Batteries

Kotobuki¹

2012

TOELECJ

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Lithium batteries have been widely used as a power source for numerous small devices such as mobile phones and laptop computers. Recently, the lithium battery is expected to be used as a power source for electric vehicles. For the electric vehicles application, an improvement of energy and power densities and safety is required. In this review, a brief explanation of structure and mechanism of the lithium batteries are given at first. Then, recent researches on cathode and anode materials to improve the energy and power densities are described. Some studies on solid electrolyte and all-solidstate battery are also introduced.

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A simple and effective strategy to synthesize Al2O3-coated LiNi0.8Co0.2O2 cathode materials for lithium ion battery

Cited by 61 publications

References 16 publications

Lithium-Ion Cathode/Coating Pairs for Transition Metal Containment

Lithium-Ion Cathode/Coating Pairs for Transition Metal Containment

An Ostwald ripening route towards Ni-rich layered cathode material with cobalt-rich surface for lithium ion battery

The Current Situation and Problems of Rechargeable Lithium Ion Batteries

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