Regulating Surface and Grain-Boundary Structures of Ni-Rich Layered Cathodes for Ultrahigh Cycle Stability

doi:10.1002/smll.201906433

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

	Regulating Surface and Grain-Boundary Structures of Ni-Rich Layered Cathodes for Ultrahigh Cycle Stability
	Cheng, Xu ; Liu, Meng ; Yin, Jingyun ; Ma, Chuansheng ; Dai, Yanzhu ; Wang, Deyu ; Mi, Shaobo ; Qiang, Wenjiang ; Huang, Bingxin ; Chen, Yanan
刊名	SMALL
	2020
卷号	16 期号:13
关键词	LITHIUM-ION BATTERIES ENERGY-DENSITY DEGRADATION GENERATION CRACKING LICOO2 LIFE
DOI	10.1002/smll.201906433
英文摘要	The wide applications of Ni-rich LiNi1-x-yCoxMnyO2 cathodes are severely limited by capacity fading and voltage fading during the cycling process resulting from the pulverization of particles, interfacial side reactions, and phase transformation. The canonical surface modification approach can improve the stability to a certain extent; however, it fails to resolve the key bottlenecks. The preparation of Li(Ni0.4Co0.2Mn0.4)(1-)xTixO2 on the surface of LiNi0.8Co0.1Mn0.1O2 particles with a coprecipitation method is reported. After sintering, Ti diffuses into the interior and mainly distributes along surface and grain boundaries. A strong surface and grain boundary strengthening are simultaneously achieved. The pristine particles are fully pulverized into first particles due to mechanical instability and high strains, which results in serious capacity fading. In contrast, the strong surface and the grain boundary strengthening can maintain the structural integrity, and therefore significantly improve the cycle stability. A general and simple strategy for the design of high-performance Ni-rich LiNi1-x-yCoxMnyO2 cathode is provided and is applicable to surface modification and grain-boundary regulation of other advanced cathodes for batteries.
学科主题	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/19829]
专题	2020专题
作者单位	1.Wang, DY (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China. 2.Qiang, WJ 3.Huang, BX (corresponding author), Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China. 4.Chen, YN (corresponding author), Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Composite & Funct Mat, Minist Educ,Key Lab Adv Ceram & Machining Technol, Tianjin 300072, Peoples R China. 5.Mi, SB (corresponding author), Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China.
推荐引用方式 GB/T 7714	Cheng, Xu,Liu, Meng,Yin, Jingyun,et al. Regulating Surface and Grain-Boundary Structures of Ni-Rich Layered Cathodes for Ultrahigh Cycle Stability[J]. SMALL,2020,16(13).
APA	Cheng, Xu.,Liu, Meng.,Yin, Jingyun.,Ma, Chuansheng.,Dai, Yanzhu.,...&Chen, Yanan.(2020).Regulating Surface and Grain-Boundary Structures of Ni-Rich Layered Cathodes for Ultrahigh Cycle Stability.SMALL,16(13).
MLA	Cheng, Xu,et al."Regulating Surface and Grain-Boundary Structures of Ni-Rich Layered Cathodes for Ultrahigh Cycle Stability".SMALL 16.13(2020).