Highly stable Ni-rich layered oxide cathode enabled by a thick protective layer with bio-tissue structure

doi:10.1016/j.ensm.2019.08.006

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Highly stable Ni-rich layered oxide cathode enabled by a thick protective layer with bio-tissue structure
	Bi, Yujing ; Liu, Meng ; Xiao, Biwei ; Jiang, Yang ; Lin, Huan ; Zhang, Zhenggang ; Chen, Guoxin ; Sun, Qian ; He, Haiyong ; Huang, Feng
刊名	ENERGY STORAGE MATERIALS
	2020
卷号	24 页码:291-296
关键词	POSITIVE ELECTRODE MATERIAL LITHIUM-ION BATTERIES ELECTROCHEMICAL PERFORMANCE THERMAL-STABILITY CORE-SHELL SURFACE LINI0.8CO0.2O2 DEGRADATION DEPOSITION BEHAVIOR
DOI	10.1016/j.ensm.2019.08.006
英文摘要	Ni-rich layered oxide (LiNixMnyCozO2 (NMC), x > 60%), one of the most promising cathode materials for highenergy lithium ion batteries (LIBs), still suffers from surface instability even with the state-of-art protective coatings, which normally are limited to <= 10 nm to maintain the required kinetics. Here we demonstrate a highly conductive protective layer with bio-tissue structure that can enable high-rate operation of NMC cathodes even with a thickness exceeding 40 nm. With this thick protection layer, the modified LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode retains 90.1% and 88.3% of its initial capacity after 1000 cycles in coin cells and pouch cells, respectively. This novel membrane is composed of crystalline nano-domains surrounded by similar to 1 nm amorphous phase, which is an effective distance to enable tunneling of electrons and Li+ ions between these domains. The coated NMC811 cathode releases similar to 55.3% less heat under thermal abuse and largely enhances his safety feature during puncture test. The coating also enables excellent electrochemical stability of NMC811 even after it was exposed to a moist environment for four weeks at 55 degrees C, which is critical for large-scale production of high-energy-density LIBs.
学科主题	Chemistry ; Science & Technology - Other Topics ; Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20273]
专题	2020专题
作者单位	1.Zhang, JG (corresponding author), Pacific Northwest Natl Lab, Richland, WA 99354 USA. 2.Sun, XL (corresponding author), Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada. 3.Wang, DY (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China.
推荐引用方式 GB/T 7714	Bi, Yujing,Liu, Meng,Xiao, Biwei,et al. Highly stable Ni-rich layered oxide cathode enabled by a thick protective layer with bio-tissue structure[J]. ENERGY STORAGE MATERIALS,2020,24:291-296.
APA	Bi, Yujing.,Liu, Meng.,Xiao, Biwei.,Jiang, Yang.,Lin, Huan.,...&Zhang, Ji-Guang.(2020).Highly stable Ni-rich layered oxide cathode enabled by a thick protective layer with bio-tissue structure.ENERGY STORAGE MATERIALS,24,291-296.
MLA	Bi, Yujing,et al."Highly stable Ni-rich layered oxide cathode enabled by a thick protective layer with bio-tissue structure".ENERGY STORAGE MATERIALS 24(2020):291-296.