Effect of micro carbon nanotubes coating on electrochemical properties of LiNi0.8Co0.1Mn0.1O2 cathode material
ZHANG Shu-xian1,2, DENG Ling-feng1,2,3, LIAN Xiao-hui1,2, TAN Jie-hui1,2, LI Jin-lei1,2
1. School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China;
2. Hunan Province Key Laboratory of Materials Surface and Interface Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China;
3. Hunan Xineng New Material Co., Ltd., Changsha 410205, China
Abstract：High nickel ternary cathode material LiNi0.8Co0.1Mn0.1O2 was prepared by high temperature sintering method, and the carbon nanotubes were treated in mixed acid. The single wall carbon nanotubes were obtained by centrifuging. Then dispersant (DMF)and LiNi0.8Co0.1Mn0.1O2 were mixed, and different amounts of carbon nanotubes were coated on the surface of LiNi0.8Co0.1Mn0.1O2by ultrasonic dispersion and spray drying method uniformly. CNTs/LiNi0.8Co0.1Mn0.1O2 composites were characterized and tested by SEM, XRD and electrochemical test system. The results show that the composite with 0.5%(mass fraction) carbon nanotubes has the best morphology and the best electrochemical performance. The first discharge specific capacities at different rates such as 0.1 C and 5 C are 215.587 mAh·g-1and 175.78 mAh·g-1, respectively. When charged at 0.1 C and discharged at a large rate of 5 C, the CNTs/LiNi0.8Co0.1Mn0.1O2 composites can still maintain the first discharge capacity of 81.54%, which is 10.48% higher than that of LiNi0.8Co0.1Mn0.1O2 which is not coated with carbon nanotubes. After 100 cycles at 1 C, the capacity retention rate is 93.02%, which is 15.42% higher than that of LiNi0.8Co0.1Mn0.1O2 which is not coated with carbon nanotubes.
张淑娴, 邓凌峰, 连晓辉, 谭洁慧, 李金磊. 微量CNTs包覆对LiNi0.8Co0.1Mn0.1O2正极材料电化学性能的影响[J]. 材料工程, 2020, 48(5): 68-74.
ZHANG Shu-xian, DENG Ling-feng, LIAN Xiao-hui, TAN Jie-hui, LI Jin-lei. Effect of micro carbon nanotubes coating on electrochemical properties of LiNi0.8Co0.1Mn0.1O2 cathode material. Journal of Materials Engineering, 2020, 48(5): 68-74.
[1] LIANG C, KONG F, LONGO R C, et al.Unraveling the origin of instability in Ni-rich LiNi1-2xCoxMnxO2 (NCM)cathode materials[J].The Journal of Physical Chemistry, 2016, 120(12):6383-6390.
[2] JU S H, KANG I S, LEE Y S, et al.Improvement of the cycling performance of LiNi0.6Co0.2Mn0.2O2 cathode active materials by a dual-conductive polymer coating[J]. ACS Applied Materials and Interfaces, 2014, 6(4):2546-2550.
[3] LIU W, OH P, LIU X, et al. Nickel-rich layered lithium transitional-metal oxide for high-energy lithium-ion batteries[J].Angewandte Chemic Electrode Materials, 2015, 54(15):4440-4457.
[4] YAN P, ZHENG J, LV D, et al. Atomic-resolution visualization of distinctive chemical mixing behavior of Ni, Co, and Mn with Li in layered lithium transition-metal oxide cathode materials[J]. Chemistry of Materials,2015, 27(15):5393-5401.
[5] 冯泽,孙旦,唐有根,等.富镍三元层状氧化物LiNi0.8Co0.1Mn0.1O2正极材料[J].化学进展,2019,31(2/3):442-454. FENG Z, SUN D, TANG Y G, et al. Rich-nickel ternary layered oxide LiNi0.8Co0.1Mn0.1O2 cathode material[J].Progress in Che-mistry, 2019, 31(2/3):442-454.
[6] LIM J M, HWANG T, KIM D, et al. Intrinsic origins of crack generation in Ni-rich LiNi0.8Co0.1Mn0.1O2 layered oxide cathode material[J]. Scientific Reports, 2017,7:39669-39677.
[7] 李想,葛武杰,王昊,等.高镍系三元层状氧化物正极材料容量衰减机理的研究进展[J].无机材料学报,2017,32(2):113-119. LI X, GE W J, WANG H, et al. Research progress on the capacity fading mechanisms of high-nickel ternary layered oxide cathode materials[J].Journal of Inorganic Materials, 2017, 32(2):113-119.
[8] 袁颂东,杨灿星,江国栋,等.锂离子电池高镍三元材料的研究进展[J].材料工程,2019,47(10):1-8. YUAN S D, YANG C X, JIANG G D, et al. Research progress in nickel-rich ternary materials for lithium-ion batteries[J]. Journal of Materials Engineering, 2019, 47(10):1-8.
[9] LU Y, PANG M, SHI S, et al.Enhanced electrochemical properties of Zr4+-doped Li1.20[Mn0.52Ni0.20Co0.08]O2 cathode material for lithium-ion battery at elevated temperature[J].Scientific Reports, 2018, 8:2981-2983.
[10] WEIGEL T, SCHIPPER F, ERICKSON E M, etal.Structural and electrochemical aspect of LiNi0.8Mn0.1Co0.1O2 cathode materials doped by various cations[J].ACS Energy Letters, 2019, 4(2):508-514.
[11] SUSAI F A, KOVACHEVA D, CHAKRABORTY A, et al. Improving performance of LiNi0.8Mn0.1Co0.1O2 cathode materials for lithium-ion batteries by doping with molybdenum-ions:theoretical and experimental studies[J].Applied Energy Materials, 2019, 2(6):4521-4532.
[12] BECKER D, BÖRNER M, NÖLLE R, et al. Surface modification of Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode material by tungsten oxide coating for improved electrochemical performance in lithium-ion batteries[J]. Applied Materials and Interfaces, 2019, 11(20):18404-18414.
[13] XU Y D, XIANG W, WU G Z, et al. Improving cycling performance and rate capability of Ni-rich LiNi0.8Co0.1Mn0.1O2 cathodematerials by Li4Ti5O12 coating[J]. Electrochemical Acta, 2018, 268:358-360.
[14] WU Z, HAN X, ZHENG J, et al. Depolarized and fully active cathode based on Li(Ni0.5Co0.2Mn0.3)O2 embedded in carbon nanotube network for advanced batteries[J].Nano Letters, 2014, 14(8):4700-4705.
[15] 胡成果,王万录.碳纳米管的电化学性质及其应用[J].功能材料,2005,36(5):730-733. HU C G, WANG W L. Investigation of electrochemical properties and their applications on CNT electrodes[J].Journal of Functional Materials, 2005, 36(5):730-733.
[16] 邓凌峰,彭辉艳,覃昱坤,等.碳纳米管包覆量对天然石墨负极材料的电化学性能的影响[J].功能材料,2016,47(12):12129-12132. DENG L F, PENG H Y, QIN Y K, et al. Effects of CNT content on electrochemical properties of nature graphite anode materials[J].Journal of Functional Materials, 2016, 47(12):12129-12132.
[17] CHENG Q, ZHOU J, KE C, et al. Method for synthesis of zeolitic imidazolate framework-derived LiCoO2/CNTs@AlF3 with enhanced lithium storage capacity[J].Inorganic Chemistry, 2019, 58(18):11993-11996.
[18] 阮泽文.LiNi(1-x-y)CoxAlyO2高镍三元正极材料的制备与改性研究[D].哈尔滨:哈尔滨工业大学,2016. RUAN Z W.Synthesis and modification of LiNi1-x-yCoxAlyO2 nickel rich cathode materials[D]. Harbin:Harbin Institute of Technology, 2016.
[19] 李龙.锂离子电池镍钴锰三元正极材料的合成与改性[D].北京:清华大学,2012. LI L. Synthesis and modification of LiNixCoyMnZO2cathode material for lithium battery[D].Beijing:Tsinghua University, 2012.
[20] 邓凌峰,彭辉艳,覃昱坤,等.碳纳米管与石墨烯协同改性天然石墨及其电化学性能[J].材料工程,2017,45(4):121-127. DENG L F, PENG H Y, QIN Y K, et al. Combination carbon nanotubes with graphene modified natural graphite and its electrochemical performance[J].Journal of Materials Engineering, 2017, 45(4):121-127.
[21] 刘力.锂硫电池正极材料的制备及其电化学性能的研究[D]. 石河子:石河子大学,2018. LIU L. Synthesis and electrochemical performance of sulfur-contained cathode materials for lithium sulfur batteries[D]. Shihezi:Shihezi University, 2018.
2020, Vol. 48 
