电源技术2025，Vol.49Issue(12)：2509-2516,8.DOI:10.3969/j.issn.1002-087X.2025.12.006
高空气耐受性碳包覆Li2NiO2的制备及正极补锂性能
Preparation and its cathode pre-lithiation performance of highly air-tolerant carbon-coated Li2NiO2
摘要
Abstract
Li2NiO2 offers the advantage of a high first-cycle charge capacity,and its delithiation volt-age is well-matcedh with most cathode materials,making it one of the research hotspots in the field of cathode pre-lithiation.However,Li2NiO2 is highly susceptible to degradation upon exposure to air due to reactions with H2O and CO2,which results in the formation of inactive byproducts and loss of its pre-lithiation functionality.The low air stability poses significant challenges in terms of storage and during manufacturing processes such as electrode coating and drying.In this work,we for the first time employed a novel dopamine dry-mixing technique followed by high-temperature calcina-tion to prepare a carbon-coated Li2NiO2 pre-lithiation agent.The resulting carbon coating effectively inhibits air-induced corrosion,substantially reducing the formation of byproducts such as Li2CO3 and LiOH.After 24 hours of air exposure,the first-cycle charge capacity attenuation of Li2NiO2 was dra-matically reduced from 51.9％to 14.2％.Furthermore,when the carbon-coated Li2NiO2 pre-lithiation agent was incorporated into NCM9055 cathodes,the full cell exhibits a 14.9％increase in first-cycle discharge capacity and an 11.5％improvement in capacity retention after 150 cycles.关键词
Li2NiO2/补锂剂/碳包覆/锂离子电池/正极材料Key words
Li2NiO2/pre-lithiation agent/carbon coating/Li-ion battery/cathode materials分类
信息技术与安全科学引用本文复制引用
王凯,王国贤,胡成志,黄超仁,宋晨,黄嗣杰,徐汶宇,陈章贤..高空气耐受性碳包覆Li2NiO2的制备及正极补锂性能[J].电源技术,2025,49(12):2509-2516,8.基金项目
安徽省自然科学基金(2208085MB34) （2208085MB34）
安徽省科技重大专项(202003a05020046) （202003a05020046）
