Atomic Layer Deposited MgO: A Lower Overpotential Coating for Li[Ni0.5Mn0.3Co0.2]O2 Cathode

被引：126

作者：

Laskar, Masihhur R. ^{[1
]}

Jackson, David H. K. ^{[1
]}

Xu, Shenzhen ^{[2
]}

Hamers, Robert J. ^{[3
]}

Morgan, Dane ^{[2
]}

Kuech, Thomas F. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Chem & Biol Engn, Madison, WI 53706 USA

[2] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

[3] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2017年 / 9卷 / 12期

关键词：

atomic layer deposition; MgO; coatin& NMC; cathode; Li-ion battery; LITHIUM-ION BATTERIES; SURFACE MODIFICATION; ELECTROCHEMICAL PROPERTIES; PERFORMANCE; LICO1/3NI1/3MN1/3O2; STABILITY; LICOO2; AL2O3; MASS; CHALLENGES;

D O I：

10.1021/acsami.6b16562

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An ultrathin MgO coating was synthesized via atomic layer deposition (ALD) to improve the surface properties of the Li[Ni0.5Mn0.3Co0.2]O-2 (NMC) cathode. An in-situ quartz crystal sensor was used to monitor the "self-limiting" surface reactions during ALD process and estimate the density of the deposited film. The electrochemical performance of the MgOcoated NMC cathode was evaluated in a half-cell assembly and compared to other ALD-based coatings, such as A1(2)O(3) and ZrO2. Cyclic voltammetry studies suggested that ALD MgO has a higher Li-diffusion coefficient which resulted in lower overpotential on the NMC cathode surface and improved Li-ion battery rate performance. MgO-Coated NMC also Yielded improved capacity retention over uncoated NMC in a long-range cycling test.

引用

页码：11231 / 11239

页数：9

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