2025 01 v.29 13-18+23
ALD沉积超薄涂层改善高镍LiNi_(0.96)Co_(0.03)Mn_(0.01)O_2正极材料的电化学性能
基金项目(Foundation):
湖南省自然科学基金（2021JJ30794）;
湖南省科技创新计划（2022RC1086）
邮箱(Email):
ziliao2000@126.com;
DOI:
10.19996/j.cnki.ChinBatlnd.2025.01.004
中文作者单位:
中南大学材料科学与工程学院;湖南省正源储能材料与器件研究所;湖南理工学院机械工程学院;青岛科技大学化工学院;
摘要(Abstract):
富含镍的层状氧化物正极存在结构不稳定性等问题，特别是当镍含量（质量分数）超过90%时，其循环性能急剧恶化。为了解决高镍材料在长循环和大倍率下容量衰减的问题，本文以LiNi_(0.96)Co_(0.03)Mn_(0.01)O_2(NCM9631)正极材料为研究对象，对其进行包覆改性研究。使用原子层沉积技术对NCM9631进行包覆改性，其中具有TiO_2涂层的T-NCM9631样品表现出良好的电化学性能。与原始材料相比，T-NCM9631的初始放电比容量从226 mAh/g提高到239 mAh/g，在0.5 C下循环100圈后，容量保持率从73.9%提高至87.95%。超薄TiO_2包覆层可以减少活性材料NCM9631与电解质的直接接触，不受HF侵蚀，防止金属溶解，有效阻止材料表面的化学和结构变化，以提高结构稳定性与电化学性能。
关键词(KeyWords):
原子层沉积;锂离子电池;高镍正极材料;TiO_2;Al_2O_3;NCM9631
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参考文献
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[2] LEE W,MUHAMMAD S,SERGEY C,et al.Advances in the cathode materials for lithium rechargeable batteries[J]. Angewandte Chemie(International Ed.in English),2020,59(7):2578-2605.
[3] HE J N,YANG M,WANG J Y,et al.Ni-rich cathode materials for high-performance Li-ion batteries:Challenges,progress and perspectives[J]. ChemNanoMat,2023,9(7):e202300148.
[4] CHOI J U,VORONINA N,SUN Y K,et al. Recent progress and perspective of advanced high-energy Coless Ni-rich cathodes for Li-ion batteries:Yesterday,today,and tomorrow[J]. Advanced Energy Materials,2020,10(42):2002027.
[5] XIE H G,PENG H R,JIANG D T,et al.Structures,issues,and optimization strategies of Ni-rich and Co-low cathode materials for lithium-ion battery[J]. Chemical Engineering Journal,2023,470:144051.
[6] SCHIPPER F,BOUZAGLO H,DIXIT M,et al.From surface ZrO2 coating to bulk Zr doping by high temperature annealing of nickel-rich lithiated oxides and their enhanced electrochemical performance in lithium ion batteries[J]. Advanced Energy Materials,2018,8(4):1701682.
[7] RAMASAMY H, SINHA S, PARK J, et al. Enhancement of electrochemical activity of Ni-rich LiNi0.8Mn0.1Co0.1O2by precisely controlled Al2O3 nanocoatings via atomic layer deposition[J]. Journal of Electrochemical Science and Technology, 2019,10(2):196-205.
[8] ZHAO J Q,QU G Y,FLAKE J C,et al.Low temperature preparation of crystalline ZrO2 coatings for improved elevated-temperature performances of Li-ion battery cathodes[J]. Chemical Communications,2012,48(65):8108-8110.
[9] KIM D W,PARK D,KO C H,et al.Improving electrochemical performance of Ni-rich cathode using atomic layer deposition with particle by particle coating method[J]. Journal of Electrochemical Science and Technology,2021,12(2):237-245.
[10] QIN C C,CAO J L,CHEN J,et al.Improvement of electrochemical performance of nickel rich Li Ni0.6Co0.2Mn0.2O2cathode active material by ultrathin TiO2 coating[J].Dalton Transactions,2016,45(23):9669-9675.
[11] SHI J L,QI R,ZHANG X D,et al.High-thermal-and air-stability cathode material with concentration-gradient buffer for Li-ion batteries[J].ACS Applied Materials&Interfaces,2017,9(49):42829-42835.
[12] MANTHIRAM A,KNIGHT J C,MYUNG S T,et al.Nickel-rich and lithium-rich layered oxide cathodes:Progress and perspectives[J].Advanced Energy Materials,2016,6(1):1501010.
[13] WU K,LI W B,QIN J,et al.Controllable atomic layer deposition coatings to boost the performance of LiMnx Coy Ni1-x-yO2 in lithium-ion batteries:A review[J]. Journal of Materials Research,2020,35(7):762-774.
[14] ZHANG H,ZHOU M Y,LIN C E,et al. Progress in polymeric separators for lithium ion batteries[J]. RSC Advances,2015,5(109):89848-89860.
[15] WANG X,MENG X B. Surface modifications of layered LiNix Mny Coz O2 cathodes via atomic and molecular layer deposition[J]. Rare Metals,2023,42(7):2121-2156.
基本信息:
DOI：10.19996/j.cnki.ChinBatlnd.2025.01.004
中图分类号:TM912;O646;TB43
引用信息:
[1]郑瑶,李荐,王利华等.ALD沉积超薄涂层改善高镍LiNi_(0.96)Co_(0.03)Mn_(0.01)O_2正极材料的电化学性能[J].电池工业,2025,29(01):13-18+23.DOI:10.19996/j.cnki.ChinBatlnd.2025.01.004.
基金信息:
湖南省自然科学基金（2021JJ30794）; 湖南省科技创新计划（2022RC1086）