One strategy to enhance electrochemical properties of Ni-based cathode materials under high cut-off voltage for Li-ion batteries

Abstract Well-distributed, nano-sized and amorphous or crystalized NaTi2(PO4)3 (NTP) coating layer with high ionic conductivity is successfully introduced onto the surface of LiNi0.6Co0.2Mn0.2O2 (LNCM) particles by a simple and effective mechanical activation method followed by adjusting the reheating temperature appropriately. The promoting influence of NTP coating on the structure stability, cycle life and high rate capability under elevated cut-off voltage has been investigated in-depth. Particularly for the crystalized NTP-coated LNCM, the main reason for the enhanced electrochemical performance can be attributed to the NTP layer with rhombohedral structure providing convenient and low activation barrier diffusion pathways for Li+ ions to insert/extract the interface of electrode/electrolyte. Besides, the NTP-coated layer with stable structure can effectively inhibit the surface side reaction during the long charge/discharge process under high cut-off voltage, which will reduce the harmful insulative by-products. It's worth mentioning that the cyclic stability of crystalized NTP-coated LNCM between 3.0 and 4.6 V is also improved significantly even under the rigorous test environment.

[1]  Seung Min Kim,et al.  Using real-time electron microscopy to explore the effects of transition-metal composition on the local thermal stability in charged LixNiyMnzCo1-y-zO2 cathode materials , 2015 .

[2]  Ning Li,et al.  Ultrathin spinel membrane-encapsulated layered lithium-rich cathode material for advanced Li-ion batteries. , 2014, Nano letters.

[3]  Juanjuan Qi,et al.  A High-Rate and Ultralong-Life Sodium-Ion Battery Based on NaTi2 (PO4 )3 Nanocubes with Synergistic Coating of Carbon and Rutile TiO2. , 2015, Small.

[4]  C. Masquelier,et al.  Lithium Insertion into Titanium Phosphates, Silicates, and Sulfates , 2002 .

[5]  Jaephil Cho,et al.  A new type of protective surface layer for high-capacity Ni-based cathode materials: nanoscaled surface pillaring layer. , 2013, Nano letters.

[6]  T. Leichtweiss,et al.  Degradation of NASICON-Type Materials in Contact with Lithium Metal: Formation of Mixed Conducting Interphases (MCI) on Solid Electrolytes , 2013 .

[7]  Min Gyu Kim,et al.  A new coating method for alleviating surface degradation of LiNi0.6Co0.2Mn0.2O2 cathode material: nanoscale surface treatment of primary particles. , 2015, Nano letters.

[8]  Yang‐Kook Sun,et al.  Effect of Residual Lithium Compounds on Layer Ni-Rich Li[Ni0.7Mn0.3]O2 , 2014 .

[9]  John B Goodenough,et al.  The Li-ion rechargeable battery: a perspective. , 2013, Journal of the American Chemical Society.

[10]  John B. Goodenough,et al.  Fast Na+-ion transport in skeleton structures , 1976 .

[11]  N. Kosova,et al.  Optimization of Ni2+/Ni3+ ratio in layered Li(Ni,Mn,Co)O2 cathodes for better electrochemistry , 2007 .

[12]  Jun Ho Song,et al.  Improved electrochemical and thermal properties of nickel rich LiNi 0.6 Co 0.2 Mn 0.2 O 2 cathode materials by SiO 2 coating , 2015 .

[13]  P. Lightfoot,et al.  Comparison of the structural behaviour of the low thermal expansion NZP phases MTi2(PO4)3 (M = Li, Na, K) , 1999 .

[14]  Jae-won Lee,et al.  Improved electrochemical properties of Li(Ni 0.6 Mn 0.2 Co 0.2 )O 2 by surface coating with Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , 2016 .

[15]  Xianyou Wang,et al.  The effects of LiTi2(PO4)3 modification on the performance of spherical Li1.5Ni0.25Mn0.75O2+δ cathode material , 2016 .

[16]  C. Delmas,et al.  Optimization of the Composition of the Li1 − z Ni1 + z O 2 Electrode Materials: Structural, Magnetic, and Electrochemical Studies , 1996 .

[17]  K. Du,et al.  Sodium additive to improve rate performance of Li[Li0.2Mn0.54Ni0.13Co0.13]O2 material for Li-ion batteries , 2013 .

[18]  Huajun Guo,et al.  Washing effects on electrochemical performance and storage characteristics of LiNi0.8Co0.1Mn0.1O2 as cathode material for lithium-ion batteries , 2013 .

[19]  Shin Fujitani,et al.  Study of LiFePO4 by Cyclic Voltammetry , 2007 .

[20]  Zhixing Wang,et al.  Effect of heat-treatment on electrochemical performance of Li3VO4-coated LiNi1/3Co1/3Mn1/3O2 cathode materials , 2015 .

[21]  K. Du,et al.  Enhanced storage property of LiNi0.8Co0.15Al0.05O2 coated with LiCoO2 , 2013 .

[22]  Yong Yang,et al.  Origin of deterioration for LiNiO2 cathode material during storage in air , 2004 .

[23]  Zongyi Wang,et al.  Improve the structure and electrochemical performance of LiNi0.6Co0.2Mn0.2O2 cathode material by nano-Al2O3 ultrasonic coating , 2014 .

[24]  Xunhui Xiong,et al.  Role of V2O5 coating on LiNiO2-based materials for lithium ion battery , 2014 .

[25]  J. Goodenough.  Challenges for Rechargeable Li Batteries , 2010 .

[26]  Heng Jiang,et al.  Synthesis of sodium titanium phosphate at ultra-low temperature , 2013, Research on Chemical Intermediates.

[27]  Na Yeon Kim,et al.  Microstructural study on degradation mechanism of layered LiNi0.6Co0.2Mn0.2O2 cathode materials by analytical transmission electron microscopy , 2016 .

[28]  Zhixing Wang,et al.  Investigation on the effect of Na doping on structure and Li-ion kinetics of layered LiNi0.6Co0.2Mn0.2O2 cathode material , 2016 .

[29]  Yangang Sun,et al.  An effective method to reduce residual lithium compounds on Ni-rich Li[Ni0.6Co0.2Mn0.2]O2 active material using a phosphoric acid derived Li3PO4 nanolayer , 2015, Nano Reseach.

[30]  Min-Joon Lee,et al.  Nickel-rich layered lithium transition-metal oxide for high-energy lithium-ion batteries. , 2015, Angewandte Chemie.

[31]  Haegyeom Kim,et al.  Understanding the Degradation Mechanisms of LiNi0.5Co0.2Mn0.3O2 Cathode Material in Lithium Ion Batteries , 2014 .

[32]  B. Scrosati,et al.  Electronic and Electrochemical Properties of LixNi1-yCoyO2 Cathodes Studied by Impedance Spectroscopy , 2001 .

[33]  J. Tu,et al.  Enhanced electrochemical performance of LiF-modified LiNi1/3Co1/3Mn1/3O2 cathode materials for Li-ion batteries , 2013 .

[34]  A. Manthiram,et al.  Role of Mn content on the electrochemical properties of nickel-rich layered LiNi(0.8-x)Co(0.1)Mn(0.1+x)O₂ (0.0 ≤ x ≤ 0.08) cathodes for lithium-ion batteries. , 2015, ACS applied materials & interfaces.

[35]  Yan Xu,et al.  Multifunctional Li2O-2B2O3 coating for enhancing high voltage electrochemical performances and thermal stability of layered structured LiNi0.5Co0.2Mn0.3O2 cathode materials for lithium ion batteries , 2015 .

[36]  M. Mitrić,et al.  High-rate intercalation capability of NaTi2(PO4)3/C composite in aqueous lithium and sodium nitrate solutions , 2015 .

[37]  K. Du,et al.  Enhanced electrochemical performance and storage property of LiNi 0.815 Co 0.15 Al 0.035 O 2 via Al gradient doping , 2016 .

[38]  J. Pereira‐Ramos,et al.  Electrochemical investigation of the Li insertion–extraction reaction as a function of lithium deficiency in Li1−xNi1+xO2 , 2001 .

[39]  Baojun Chen,et al.  An approach to application for LiNi0.6Co0.2Mn0.2O2 cathode material at high cutoff voltage by TiO2 coating , 2014 .