The influence of the voltage plateau on the coulombic efficiency and capacity degradation in LiNi0.5Mn1.5O4 materials

被引:27
作者
Cui, Xiaoling [1 ,2 ]
Geng, Tongtong [1 ,2 ]
Zhang, Feilong [1 ]
Zhang, Ningshuang [1 ,2 ]
Zhao, Dongni [1 ,2 ]
Li, Chunlei [1 ,2 ]
Li, Shiyou [1 ,2 ]
机构
[1] Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Peoples R China
[2] Gansu Engn Lab Cathode Mat Lithium Ion Battery, Lanzhou 730050, Peoples R China
基金
中国国家自然科学基金;
关键词
LiNi0.5Mn1.5O4; Voltage plateau; Coulombic efficiency; Capacity degradation; Cut-off potential; CATHODE MATERIAL; SPINEL CATHODE; LITHIUM; PERFORMANCE; DISSOLUTION; STABILITY; FILM;
D O I
10.1016/j.jallcom.2019.153443
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
High-voltage LiNi0.5Mn1.5O4 materials with working voltage of 4.7 V vs. Li/Li+ can be used in lithium-ion batteries to meet the demands of high-voltage applications. However, these materials tend to undergo capacity degradation with cycling, and exhibit low coulombic efficiency. The redox reactions of the transition metals in LiNi0.5Mn1.5O4 are related to voltage plateaus, which have an important influence on the electrochemical performance of lithium-ion batteries. In this work, we investigated the effects of two voltage plateaus for LiNi0.5Mn1.5O4 cathode (4.0 V vs. Li+/Li and 4.7 V vs. Li+/Li) on the capacity degradation and coulombic efficiency, through the charging of half-cells to different cut-off potentials. We find that the redox reactions of manganese at the 4.0 V plateau play a negligible role in the capacity loss, while the increase in manganese content in the cathode material can significantly affect the coulombic efficiency. By contrast, when the cell was charged to cut-off potentials >= 4.8 V with a plateau at 4.7 V for nickel, the cell capacity degraded rapidly. Interestingly, when the cells were charged to 5.0 V, the content of P, F, Ni, and Mn increased with the thickness of the SEI film, indicating accelerated decomposition of the electrolyte due to the contribution of nickel. Thus, this work verifies the dependence of the capacity degradation and coulombic efficiency on the voltage plateau, and provides important information for further investigation of the effect of voltage plateaus on the characteristics and behavior of cathode materials. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页数:10
相关论文
共 38 条
[1]   Building better batteries [J].
Armand, M. ;
Tarascon, J. -M. .
NATURE, 2008, 451 (7179) :652-657
[2]   Roles of carbon dioxide and steam on the hydrogen embrittlement of 3Cr tube steel in synthetic natural gas environment [J].
Bai, Pengpeng ;
Zhou, Jie ;
Luo, Bingwei ;
Zheng, Shuqi ;
Chen, Changfeng .
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY, 2018, 53 (01) :1-10
[3]   Review-Manganese Dissolution from Spinel Cathode: Few Unanswered Questions [J].
Bhandari, Arihant ;
Bhattacharya, Jishnu .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2017, 164 (02) :A106-A127
[4]   Insights about the irreversible capacity of LiNi0.5Mn1.5O4 cathode materials in lithium batteries [J].
Brutti, Sergio ;
Greco, Giorgia ;
Reale, Priscilla ;
Panero, Stefania .
ELECTROCHIMICA ACTA, 2013, 106 :483-493
[5]   Understanding the Formation of the Truncated Morphology of High-Voltage Spinel LiNi0.5Mn1.5O4 via Direct Atomic-Level Structural Observations [J].
Chen, Bin ;
Ben, Liubin ;
Chen, Yuyang ;
Yu, Hailong ;
Zhang, Hua ;
Zhao, Wenwu ;
Huang, Xuejie .
CHEMISTRY OF MATERIALS, 2018, 30 (06) :2174-2182
[6]   High performance LiNi0.5Mn1.5O4 cathode material with a bi-functional coating for lithium ion batteries [J].
Chong, Jin ;
Zhang, Jingping ;
Xie, Haiming ;
Song, Xiangyun ;
Liu, Gao ;
Battaglia, Vincent ;
Xun, Shidi ;
Wang, Rongsun .
RSC ADVANCES, 2016, 6 (23) :19245-19251
[7]   Li3PO4-Coated LiNi0.5Mn1.5O4: A Stable High-Voltage Cathode Material for Lithium-Ion Batteries [J].
Chong, Jin ;
Xun, Shidi ;
Zhang, Jingping ;
Song, Xiangyun ;
Xie, Haiming ;
Battaglia, Vincent ;
Wang, Rongshun .
CHEMISTRY-A EUROPEAN JOURNAL, 2014, 20 (24) :7479-7485
[8]   High performance 5 V LiNi0.5Mn1.5O4 spinel cathode materials synthesized by an improved solid-state method [J].
Gao, Zhi-Gang ;
Sun, Kai ;
Cong, Li-Na ;
Zhang, Yu-Hang ;
Zhao, Qin ;
Wang, Rong-Shun ;
Xie, Hai-Ming ;
Sun, Li-Qun ;
Su, Zhong-Min .
JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 654 :257-263
[9]   Challenges for Rechargeable Li Batteries [J].
Goodenough, John B. ;
Kim, Youngsik .
CHEMISTRY OF MATERIALS, 2010, 22 (03) :587-603
[10]   Surface-modified carbon nanotube coating on high-voltage LiNi0.5Mn1.5O4 cathodes for lithium ion batteries [J].
Hwang, Taejin ;
Lee, Joong Kee ;
Mun, Junyoung ;
Choi, Wonchang .
JOURNAL OF POWER SOURCES, 2016, 322 :40-48