Article
Engineering, Environmental
Rasu Muruganantham, Tzu-Hsin Tseng, Meng-Lun Lee, Soorathep Kheawhom, Wei-Ren Liu
Summary: This study proposes a method of plasma-modified TiN to improve the electrochemical performance and stabilize the cathode-electrolyte interface reaction of Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode material. The physicochemical properties, Li storage performance, and factors for improving the electrochemical performance were systematically investigated. The NCM811-TiN/graphite pouch cell showed high reversible capacity and cycle stability without changing the bulk structure and morphology, facilitating the practical use of safe and high-energy-density Li-ion batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Naoki Kimura, Eiji Seki, Tatsuya Tooyama, Shin Nishimura
Summary: Coating Al2O3 on NCM811 particles can improve the cycle performance of graphite lithium-ion cells by mainly suppressing the growth of surface deposit and NiO-like layer through the formation of solid solution and AlF3 layers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Jun Su Lee, Yong Joon Park
Summary: Surface coating is essential for stabilizing the cathode/sulfide interface in all-solid-state batteries, with LiTaO3 and LiNbO3 being popular coating materials. Different coating methods, such as postcoating and precursor-based (PB) coating, have varying effects on the cathode performance. The PB coating method, which offers additional doping effects, shows superior rate capability and cyclic performance in comparison to the postcoating method.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Wen Liu, Xifei Li, Youchen Hao, Dongbin Xiong, Hui Shan, Jingjing Wang, Wei Xiao, Huijuan Yang, Hong Yang, Liang Kou, Zhanyuan Tian, Le Shao, Cheng Zhang
Summary: By designing an ultrathin and stable interface, the capacity retention and operating voltage stability of the cathode at a high cut-off voltage are significantly enhanced, while detrimental factors are restrained, leading to improved cyclability and rate capability of the battery.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Sisi Zhou, Xianggong Zhang, Zhihao Zhang, Songting Liu, Rui Wang
Summary: LiNi1/3Co1/3Mn1/3O2 is a widely used commercial cathode material, but its energy density needs improvement. Coating a LiF layer on the surface of LiNi1/3Co1/3Mn1/3O2 can protect the material, improve interfacial stability, and enhance cyclic performance. The LiF-coated NCM exhibits higher capacity retention rates than the bare sample after 100 cycles. This study suggests that LiF surface layer is a promising method to enhance the electrochemical performance of NCM cathode materials.
Article
Nanoscience & Nanotechnology
Mingyue Gao, Yangyang Wang, Shaolun Cui, Sheng Liu, Xue-Ping Gao, Guoran Li
Summary: This article introduces a method for improving the energy density of Li-ion batteries by using an organic acid modification layer to address the surface and interface issues of Ni-rich layered oxides, thereby improving structural stability, mechanical integrity, and capacity retention.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Zhitao E, Huajun Guo, Jiexi Wang, Zhixing Wang, Xinhai Li, Guochun Yan
Summary: In this study, the stability of LiCoO2 (LCO) under high cutoff voltages was improved by modifying it with Al-Mg-Ti co-doping and Al2O3 coating. The modified LCO showed enhanced electrochemical and kinetic performances. A new phase, Al2Ti7O15 (ATO), was discovered near the surface of the modified LCO, which improved electron conductivity and transmission property of lithium ions. This work provides new insights into the effect of Al-Mg-Ti co-doping on LCO materials.
APPLIED SURFACE SCIENCE
(2022)
Article
Electrochemistry
S. Krishna Kumar, Sourav Ghosh, Madhushri Bhar, Ajay K. Kavala, Sivaraman Patchaiyappan, Surendra K. Martha
Summary: Li2MnSiO4 cathode material, coated with LiF and incorporated into a 3D-electrode architecture, shows significant improvement in electrochemical performance, including initial capacity, cycle life, and stability. The LiF coating enhances interface and structural stability, leading to better performance compared to pristine Li2MnSiO4.
ELECTROCHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Yang Zhang, Ye Song, Jie Liu
Summary: It is discovered that the electron donor functional groups of organic polymers can form stable coordination bonds with nickel atoms in LiNixCoyMn1-x-yO2 (NCM) cathode material, providing an empty orbit for electron transfer. This enhances the interface stability between the polymer coating and NCM and inhibits the decomposition of metal ions during the deintercalation/intercalation process. The modified material shows excellent cyclic stability and rate performance, with a capacity retention of 91.93% after 100 cycles and a capacity of 143.8 mA h g-1 at 5 C.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Shuping Zhang, Jianyang Wu, Guangyu Zhao, Jing Chen, Huanfang Yang, Xiaorui Jiang, Miao Li, Bin Wu, Wen Liu, Henghui Zhou, Hailei Zhao
Summary: By surface coating and heat annealing LiCoO2 with Li2CoP2O7, the high-voltage performance of LiCoO2 can be improved, achieving high-voltage stability and high lithium-ion conductivity.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Yang Zhang, Can Cui, Jie Liu, Yiying Bei, Yingying Li, Zheng Song, Yaxin Feng, Heng Xu, Suhuan Tian, Ye Song, Fengsheng Li
Summary: This study introduces a strategy of co-modification with Nb doping and LiBO2 coating to improve the electrochemical performance of LiNixCoyMn1-x-yO2 (NCM) materials. Experimental results demonstrate that this co-modification method can effectively stabilize the internal structure, reduce cation mixing, and improve the cycling stability of the materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Hongxiang Ji, Liubin Ben, Shan Wang, Zhongzhu Liu, Robson Monteiro, Rogerio Ribas, Hailong Yu, Peng Gao, Yongming Zhu, Xuejie Huang
Summary: The research demonstrates that by precisely controlling the coating concentration and temperature, Nb2O5 can effectively bond to the surface of LiMn2O4 spinel cathode material, significantly improving the electrochemical performance. However, at high coating concentrations, Nb5+ ions diffuse into the cathode structure, leading to a decrease in cycling performance.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
M. A. A. Mohamed, L. Singer, H. Hahn, D. Djendjur, A. Oezkara, E. Thauer, I. G. Gonzalez-Martinez, M. Hantusch, B. Buechner, S. Hampel, R. Klingeler, N. Graessler
Summary: In this study, an antiperovskite (Li2Fe)SeO material was synthesized using a one-step solid-state method. The material showed excellent thermal stability and high cycling performance, making it a promising cathode material for lithium-ion batteries.
JOURNAL OF POWER SOURCES
(2023)
Article
Engineering, Environmental
Fanghui Du, Zhongxu Fan, Lei Ding, Yan Wang, Wenjing Shi, Jie Zhang, Hanyu Qu, Xiaoxuan Yu, Yuling Chen, Junwei Zheng
Summary: The element interdiffusion and interfacial reactions between LiCoO2 and the Ti(SO4)2 coating precursor have been investigated. Li preferentially diffuses into the coating precursor and reacts with SO42- to form Li2SO4, while Co diffuses into the coating precursor and reacts with Ti-containing species to form Li2CoTi3O8 coating. The surface structure of LiCoO2 undergoes reconstruction and partially transforms into Co3O4. The stable Li2SO4 coating acts as a physical barrier, while the Li2CoTi3O8 coating stabilizes the cathode/electrolyte interface and promotes lithium-ion transport, and the Co3O4 phase bridges the Li2CoTi3O8 coating and the LiCoO2 host.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Xiaoling Cui, Kuanyou Tuo, Hong Dong, Xiaolan Fu, Shimin Wang, Ningshuang Zhang, Liping Mao, Shiyou Li
Summary: The modification of phosphorus-doped carbon coating on LFMP improves electronic conductivity and ion transmission, forming a three-dimensional conductive channel and maintaining excellent electrochemical performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
