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

被引：122
|
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
收藏
页码：11231 / 11239
页数：9
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