Li1.1Na0.1Mn0.534Ni0.133Co0.133O2 as cathode with ameliorated electrochemical performance based on dual Li+/Na+ electrolyte
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Layered Li-rich cathode materials Li1.2Mn0.534Ni0.133Co0.133O2 (LNCMN-0) and Na doping Li1.1Na0.1Mn0.534Ni0.133Co0.133O2 (LNCMN-0.1) are prepared successfully by a co-precipitation method and several consecutive calcination treatments. Besides, the phase structure, morphology, and electrochemical properties of the four samples are studied in detail using X-ray diffraction (XRD), scanning electron microscope (SEM), galvanostatic charge-discharge test, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). Although the discharge capacity of spherical LNCMN-0.1 decreases slightly at 0.1 C (1 C = 250 mA g−1), compared to the pristine LNCMN-0, it is noteworthy that the LNCMN-0.1 matched with dual Li+/Na+ electrolyte exhibit superior stability performance at 1 C, as well as enhanced rate capability. The LNCMN-0.1 (Li+/Na+) delivers an initial discharge specific capacity of 267.61 mAh g−1 at 0.1 C between 2.0 and 4.8 V at room temperature and initial coulombic efficiency of 83.51%, which is higher than the LNCMN-0 samples (76.42 and 81.54%). The experimental results verify that Na doping combined with dual Li+/Na+ electrolyte can generate a synergistic effect, which is a promising idea to ameliorate the electrochemical performance for this material.
KeywordsLi-rich layered cathode materials Na doping Dual Li+/Na+ electrolyte Synergistic effect
This work is financially supported by the union project of National Natural Science Foundation of China and Guangdong Province (No. U1601214), the Scientific and Technological Plan of Guangdong Province (2016B010114002, 2017B090901027), the Scientific and Technological Plan of Guangzhou City (201607010322), the LanDun information security technology open fund (LD20170210), and the Innovation Project of Graduate School of South China Normal University (2017LKXM081).
- 3.Chen HD, Hou XH, Qu LN, Qin H, Ru Q, Huang Y, Hu S, Lam KH (2017) Electrochemical properties of core–shell nano-Si@carbon composites as superior anode materials for high-performance Li-ion batteries. J Mater Sci Mater Electron 28:250–258. https://doi.org/10.1007/s10854-016-5518-x CrossRefGoogle Scholar
- 5.Kolek M, Otteny F, Schmidt P, Mück-Lichtenfeld C, Einholz C, Becking J, Schleicher E, Winter M, Bieker P, Esser B (2017) Ultra-high cycling stability of poly(vinylphenothiazine) as a battery cathode material resulting from π–π interactions. Energy Environ Sci 10:2334–2341. https://doi.org/10.1039/c7ee01473b CrossRefGoogle Scholar
- 9.Kobayashi G, Irii Y, Matsumoto F, Ito A, Ohsawa Y, Yamamoto S, Cui Y, Son JY, Sato Y (2016) Improving cycling performance of Li-rich layered cathode materials through combination of Al2O3-based surface modification and stepwise precycling. J Power Sources 303:250–256. https://doi.org/10.1016/j.jpowsour.2015.11.014 CrossRefGoogle Scholar
- 21.Kasnatscheew J, Evertz M, Streipert B, Wagner R, Klöpsch R, Vortmann B, Hahn H, Nowak S, Amereller M, Gentschev AC, Lamp P, Winter M (2016) The truth about the 1st cycle coulombic efficiency of LiNi1/3Co1/3Mn1/3O2 (NCM) cathodes. Phys Chem Chem Phys 18:3956–3965. https://doi.org/10.1039/c5cp07718d CrossRefGoogle Scholar
- 24.Lu C, Wu H, Zhang Y, Liu H, Chen B, Wu N, Wang S (2014) Cerium fluoride coated layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 as cathode materials with improved electrochemical performance for lithium ion batteries. J Power Sources 267:682–691. https://doi.org/10.1016/j.jpowsour.2014.05.122 CrossRefGoogle Scholar
- 29.Chen Z, Wang J, Chao DL, Baikie T, Bai L, Chen S, Zhao Y, Sum TC, Lin J, Shen Z (2016) Hierarchical porous LiNi1/3Co1/3Mn1/3O2 Nano−/micro spherical cathode material: minimized cation mixing and improved Li+ mobility for enhanced electrochemical performance. Sci Rep 6:25771. https://doi.org/10.1038/srep25771 CrossRefGoogle Scholar